In the Linux kernel, the following vulnerability has been resolved: btrfs: do not strictly require dirty metadata threshold for metadata writepages [BUG] There is an internal report that over 1000 processes are waiting at the io_schedule_timeout() of balance_dirty_pages(), causing a system hang and trigger a kernel coredump. The kernel is v6.4 kernel based, but the root problem still applies to any upstream kernel before v6.18. [CAUSE] From Jan Kara for his wisdom on the dirty page balance behavior first. This cgroup dirty limit was what was actually playing the role here because the cgroup had only a small amount of memory and so the dirty limit for it was something like 16MB. Dirty throttling is responsible for enforcing that nobody can dirty (significantly) more dirty memory than there's dirty limit. Thus when a task is dirtying pages it periodically enters into balance_dirty_pages() and we let it sleep there to slow down the dirtying. When the system is over dirty limit already (either globally or within a cgroup of the running task), we will not let the task exit from balance_dirty_pages() until the number of dirty pages drops below the limit. So in this particular case, as I already mentioned, there was a cgroup with relatively small amount of memory and as a result with dirty limit set at 16MB. A task from that cgroup has dirtied about 28MB worth of pages in btrfs btree inode and these were practically the only dirty pages in that cgroup. So that means the only way to reduce the dirty pages of that cgroup is to writeback the dirty pages of btrfs btree inode, and only after that those processes can exit balance_dirty_pages(). Now back to the btrfs part, btree_writepages() is responsible for writing back dirty btree inode pages. The problem here is, there is a btrfs internal threshold that if the btree inode's dirty bytes are below the 32M threshold, it will not do any writeback. This behavior is to batch as much metadata as possible so we won't write back those tree blocks and then later re-COW them again for another modification. This internal 32MiB is higher than the existing dirty page size (28MiB), meaning no writeback will happen, causing a deadlock between btrfs and cgroup: - Btrfs doesn't want to write back btree inode until more dirty pages - Cgroup/MM doesn't want more dirty pages for btrfs btree inode Thus any process touching that btree inode is put into sleep until the number of dirty pages is reduced. Thanks Jan Kara a lot for the analysis of the root cause. [ENHANCEMENT] Since kernel commit b55102826d7d ("btrfs: set AS_KERNEL_FILE on the btree_inode"), btrfs btree inode pages will only be charged to the root cgroup which should have a much larger limit than btrfs' 32MiB threshold. So it should not affect newer kernels. But for all current LTS kernels, they are all affected by this problem, and backporting the whole AS_KERNEL_FILE may not be a good idea. Even for newer kernels I still think it's a good idea to get rid of the internal threshold at btree_writepages(), since for most cases cgroup/MM has a better view of full system memory usage than btrfs' fixed threshold. For internal callers using btrfs_btree_balance_dirty() since that function is already doing internal threshold check, we don't need to bother them. But for external callers of btree_writepages(), just respect their requests and write back whatever they want, ignoring the internal btrfs threshold to avoid such deadlock on btree inode dirty page balancing.

An update of the linux package has been released.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1543 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    fs/xattr: missing fdput() in fremovexattr error path (CVE-2024-14027)

    In the Linux kernel, the following vulnerability has been resolved:

    audit: add fchmodat2() to change attributes class (CVE-2025-71239)

    In the Linux kernel, the following vulnerability has been resolved:

    fs: ntfs3: fix infinite loop in attr_load_runs_range on inconsistent metadata (CVE-2025-71265)

    In the Linux kernel, the following vulnerability has been resolved:

    fs: ntfs3: check return value of indx_find to avoid infinite loop (CVE-2025-71266)

    In the Linux kernel, the following vulnerability has been resolved:

    fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST (CVE-2025-71267)

    In the Linux kernel, the following vulnerability has been resolved:

    btrfs: do not strictly require dirty metadata threshold for metadata writepages (CVE-2026-23157)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: nf_tables: fix use-after-free in nf_tables_addchain() (CVE-2026-23231)

    In the Linux kernel, the following vulnerability has been resolved:

    espintcp: Fix race condition in espintcp_close() (CVE-2026-23239)

    In the Linux kernel, the following vulnerability has been resolved:

    tls: Fix race condition in tls_sw_cancel_work_tx() (CVE-2026-23240)

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/umad: Reject negative data_len in ib_umad_write (CVE-2026-23243)

    In the Linux kernel, the following vulnerability has been resolved:

    nvme: fix memory allocation in nvme_pr_read_keys() (CVE-2026-23244)

    In the Linux kernel, the following vulnerability has been resolved:

    xfs: check for deleted cursors when revalidating two btrees (CVE-2026-23249)

    In the Linux kernel, the following vulnerability has been resolved:

    net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks (CVE-2026-23270)

    In the Linux kernel, the following vulnerability has been resolved:

    perf: Fix __perf_event_overflow() vs perf_remove_from_context() race (CVE-2026-23271)

    In the Linux kernel, the following vulnerability has been resolved:

    macvlan: observe an RCU grace period in macvlan_common_newlink() error path (CVE-2026-23273)

    In the Linux kernel, the following vulnerability has been resolved:

    drbd: fix null-pointer dereference on local read error (CVE-2026-23285)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: target: Fix recursive locking in __configfs_open_file() (CVE-2026-23292)

    In the Linux kernel, the following vulnerability has been resolved:

    net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled (CVE-2026-23293)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: core: Fix refcount leak for tagset_refcnt (CVE-2026-23296)

    In the Linux kernel, the following vulnerability has been resolved:

    nfsd: Fix cred ref leak in nfsd_nl_threads_set_doit(). (CVE-2026-23297)

    In the Linux kernel, the following vulnerability has been resolved:

    net: ipv6: fix panic when IPv4 route references loopback IPv6 nexthop (CVE-2026-23300)

    In the Linux kernel, the following vulnerability has been resolved:

    smb: client: Don't log plaintext credentials in cifs_set_cifscreds (CVE-2026-23303)

    In the Linux kernel, the following vulnerability has been resolved:

    ipv6: fix NULL pointer deref in ip6_rt_get_dev_rcu() (CVE-2026-23304)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf/bonding: reject vlan+srcmac xmit_hash_policy change when XDP is loaded (CVE-2026-23310)

    In the Linux kernel, the following vulnerability has been resolved:

    i40e: Fix preempt count leak in napi poll tracepoint (CVE-2026-23313)

    In the Linux kernel, the following vulnerability has been resolved:

    net: ipv4: fix ARM64 alignment fault in multipath hash seed (CVE-2026-23316)

    In the Linux kernel, the following vulnerability has been resolved:

    drm/vmwgfx: Return the correct value in vmw_translate_ptr functions (CVE-2026-23317)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix a UAF issue in bpf_trampoline_link_cgroup_shim (CVE-2026-23319)

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/irdma: Fix kernel stack leak in irdma_create_user_ah() (CVE-2026-23335)

    In the Linux kernel, the following vulnerability has been resolved:

    net: sched: avoid qdisc_reset_all_tx_gt() vs dequeue race for lockless qdiscs (CVE-2026-23340)

    In the Linux kernel, the following vulnerability has been resolved:

    xdp: produce a warning when calculated tailroom is negative (CVE-2026-23343)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: nft_set_pipapo: split gc into unlink and reclaim phase (CVE-2026-23351)

    In the Linux kernel, the following vulnerability has been resolved:

    x86/efi: defer freeing of boot services memory (CVE-2026-23352)

    In the Linux kernel, the following vulnerability has been resolved:

    x86/fred: Correct speculative safety in fred_extint() (CVE-2026-23354)

    In the Linux kernel, the following vulnerability has been resolved:

    drbd: fix LOGIC BUG in drbd_al_begin_io_nonblock() (CVE-2026-23356)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix stack-out-of-bounds write in devmap (CVE-2026-23359)

    In the Linux kernel, the following vulnerability has been resolved:

    nvme: fix admin queue leak on controller reset (CVE-2026-23360)

    In the Linux kernel, the following vulnerability has been resolved:

    PCI: dwc: ep: Flush MSI-X write before unmapping its ATU entry (CVE-2026-23361)

    In the Linux kernel, the following vulnerability has been resolved:

    can: bcm: fix locking for bcm_op runtime updates (CVE-2026-23362)

    In the Linux kernel, the following vulnerability has been resolved:

    i2c: i801: Revert i2c: i801: replace acpi_lock with I2C bus lock (CVE-2026-23369)

    In the Linux kernel, the following vulnerability has been resolved:

    net/sched: ets: fix divide by zero in the offload path (CVE-2026-23379)

    In the Linux kernel, the following vulnerability has been resolved:

    tracing: Fix WARN_ON in tracing_buffers_mmap_close (CVE-2026-23380)

    In the Linux kernel, the following vulnerability has been resolved:

    net: bridge: fix nd_tbl NULL dereference when IPv6 is disabled (CVE-2026-23381)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing (CVE-2026-23383)

    In the Linux kernel, the following vulnerability has been resolved:

    Squashfs: check metadata block offset is within range (CVE-2026-23388)

    In the Linux kernel, the following vulnerability has been resolved:

    net/rds: Fix circular locking dependency in rds_tcp_tune (CVE-2026-23419)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20416-1 advisory.

    The SUSE Linux Enterprise 16.0 kernel was updated to fix various security issues.

    The following security issues were fixed:

    - CVE-2025-39753: gfs2: Set .migrate_folio in gfs2_{rgrp,meta}_aops (bsc#1249590).
    - CVE-2025-39964: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg (bsc#1251966).
    - CVE-2025-40099: cifs: parse_dfs_referrals: prevent oob on malformed input (bsc#1252911).
    - CVE-2025-40103: smb: client: Fix refcount leak for cifs_sb_tlink (bsc#1252924).
    - CVE-2025-40230: mm: prevent poison consumption when splitting THP (bsc#1254817).
    - CVE-2025-68173: ftrace: Fix softlockup in ftrace_module_enable (bsc#1255311).
    - CVE-2025-68186: ring-buffer: Do not warn in ring_buffer_map_get_reader() when reader catches up     (bsc#1255144).
    - CVE-2025-68292: mm/memfd: fix information leak in hugetlb folios (bsc#1255148).
    - CVE-2025-68295: smb: client: fix memory leak in cifs_construct_tcon() (bsc#1255129).
    - CVE-2025-68329: tracing: Fix WARN_ON in tracing_buffers_mmap_close for split VMAs (bsc#1255490).
    - CVE-2025-68371: scsi: smartpqi: Fix device resources accessed after device removal (bsc#1255572).
    - CVE-2025-68745: scsi: qla2xxx: Clear cmds after chip reset (bsc#1255721).
    - CVE-2025-68785: net: openvswitch: fix middle attribute validation in push_nsh() action (bsc#1256640).
    - CVE-2025-68810: KVM: Disallow toggling KVM_MEM_GUEST_MEMFD on an existing memslot (bsc#1256679).
    - CVE-2025-71071: iommu/mediatek: fix use-after-free on probe deferral (bsc#1256802).
    - CVE-2025-71104: KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer     (bsc#1256708).
    - CVE-2025-71125: tracing: Do not register unsupported perf events (bsc#1256784).
    - CVE-2025-71134: mm/page_alloc: change all pageblocks migrate type on coalescing (bsc#1256732).
    - CVE-2025-71161: dm-verity: disable recursive forward error correction (bsc#1257174).
    - CVE-2025-71184: btrfs: tracepoints: use btrfs_root_id() to get the id of a root (bsc#1257635).
    - CVE-2025-71193: phy: qcom-qusb2: Fix NULL pointer dereference on early suspend (bsc#1257686).
    - CVE-2025-71225: md: suspend array while updating raid_disks via sysfs (bsc#1258411).
    - CVE-2026-22979: net: fix memory leak in skb_segment_list for GRO packets (bsc#1257228).
    - CVE-2026-22998: nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec (bsc#1257209).
    - CVE-2026-23003: ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv() (bsc#1257246).
    - CVE-2026-23004: dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list() (bsc#1257231).
    - CVE-2026-23010: ipv6: Fix use-after-free in inet6_addr_del() (bsc#1257332).
    - CVE-2026-23017: idpf: fix error handling in the init_task on load (bsc#1257552).
    - CVE-2026-23022: idpf: fix memory leak in idpf_vc_core_deinit() (bsc#1257581).
    - CVE-2026-23023: idpf: fix memory leak in idpf_vport_rel() (bsc#1257556).
    - CVE-2026-23024: idpf: fix memory leak of flow steer list on rmmod (bsc#1257572).
    - CVE-2026-23035: net/mlx5e: Pass netdev to mlx5e_destroy_netdev instead of priv (bsc#1257559).
    - CVE-2026-23042: idpf: fix aux device unplugging when rdma is not supported by vport (bsc#1257705).
    - CVE-2026-23047: libceph: make calc_target() set t->paused, not just clear it (bsc#1257682).
    - CVE-2026-23053: NFS: Fix a deadlock involving nfs_release_folio() (bsc#1257718).
    - CVE-2026-23057: vsock/virtio: Coalesce only linear skb (bsc#1257740).
    - CVE-2026-23064: net/sched: act_ife: avoid possible NULL deref (bsc#1257765).
    - CVE-2026-23066: rxrpc: Fix recvmsg() unconditional requeue (bsc#1257726).
    - CVE-2026-23068: spi: spi-sprd-adi: Fix double free in probe error path (bsc#1257805).
    - CVE-2026-23069: vsock/virtio: fix potential underflow in virtio_transport_get_credit() (bsc#1257755).
    - CVE-2026-23070: Octeontx2-af: Add proper checks for fwdata (bsc#1257709).
    - CVE-2026-23074: net/sched: Enforce that teql can only be used as root qdisc (bsc#1257749).
    - CVE-2026-23083: tools: ynl-gen: use big-endian netlink attribute types (bsc#1257745).
    - CVE-2026-23084: be2net: Fix NULL pointer dereference in be_cmd_get_mac_from_list (bsc#1257830).
    - CVE-2026-23085: irqchip/gic-v3-its: Avoid truncating memory addresses (bsc#1257758).
    - CVE-2026-23086: vsock/virtio: cap TX credit to local buffer size (bsc#1257757).
    - CVE-2026-23088: tracing: Fix crash on synthetic stacktrace field usage (bsc#1257814).
    - CVE-2026-23095: gue: Fix skb memleak with inner IP protocol 0 (bsc#1257808).
    - CVE-2026-23097: migrate: correct lock ordering for hugetlb file folios (bsc#1257815).
    - CVE-2026-23099: bonding: limit BOND_MODE_8023AD to Ethernet devices (bsc#1257816).
    - CVE-2026-23100: mm/hugetlb: fix hugetlb_pmd_shared() (bsc#1257817).
    - CVE-2026-23102: arm64/fpsimd: signal: Fix restoration of SVE context (bsc#1257772).
    - CVE-2026-23104: ice: fix devlink reload call trace (bsc#1257763).
    - CVE-2026-23105: net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag     (bsc#1257775).
    - CVE-2026-23107: arm64/fpsimd: signal: Allocate SSVE storage when restoring ZA (bsc#1257762).
    - CVE-2026-23110: scsi: core: Wake up the error handler when final completions race against each other     (bsc#1257761).
    - CVE-2026-23111: netfilter: nf_tables: fix inverted genmask check in nft_map_catchall_activate()     (bsc#1258181).
    - CVE-2026-23112: nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec (bsc#1258184).
    - CVE-2026-23116: pmdomain: imx8m-blk-ctrl: Remove separate rst and clk mask for 8mq vpu (bsc#1258277).
    - CVE-2026-23119: bonding: provide a net pointer to __skb_flow_dissect() (bsc#1258273).
    - CVE-2026-23136: libceph: reset sparse-read state in osd_fault() (bsc#1258303).
    - CVE-2026-23139: netfilter: nf_conncount: update last_gc only when GC has been performed (bsc#1258304).
    - CVE-2026-23141: btrfs: send: check for inline extents in range_is_hole_in_parent() (bsc#1258377).
    - CVE-2026-23142: mm/damon/sysfs-scheme: cleanup access_pattern subdirs on scheme dir setup failure     (bsc#1258289).
    - CVE-2026-23144: mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure (bsc#1258290).
    - CVE-2026-23148: nvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference (bsc#1258258).
    - CVE-2026-23154: net: fix segmentation of forwarding fraglist GRO (bsc#1258286).
    - CVE-2026-23161: mm/shmem, swap: fix race of truncate and swap entry split (bsc#1258355).
    - CVE-2026-23166: ice: Fix NULL pointer dereference in ice_vsi_set_napi_queues (bsc#1258272).
    - CVE-2026-23169: mptcp: fix race in mptcp_pm_nl_flush_addrs_doit() (bsc#1258389).
    - CVE-2026-23171: bonding: fix use-after-free due to enslave fail after slave array update (bsc#1258349).
    - CVE-2026-23173: net/mlx5e: TC, delete flows only for existing peers (bsc#1258520).
    - CVE-2026-23179: nvmet-tcp: fixup hang in nvmet_tcp_listen_data_ready() (bsc#1258394).
    - CVE-2026-23189: ceph: fix NULL pointer dereference in ceph_mds_auth_match() (bsc#1258308).
    - CVE-2026-23198: KVM: Don't clobber irqfd routing type when deassigning irqfd (bsc#1258321).
    - CVE-2026-23208: ALSA: usb-audio: Prevent excessive number of frames (bsc#1258468).
    - CVE-2026-23209: macvlan: fix error recovery in macvlan_common_newlink() (bsc#1258518).
    - CVE-2026-23210: ice: Fix PTP NULL pointer dereference during VSI rebuild (bsc#1258517).
    - CVE-2026-23214: btrfs: reject new transactions if the fs is fully read-only (bsc#1258464).
    - CVE-2026-23223: xfs: fix UAF in xchk_btree_check_block_owner (bsc#1258483).
    - CVE-2026-23224: erofs: fix UAF issue for file-backed mounts w/ directio option (bsc#1258461).

    The following non security issues were fixed:

    - ALSA: usb-audio: Update the number of packets properly at receiving (stable-fixes).
    - ALSA: usb-audio: fix broken logic in snd_audigy2nx_led_update() (git-fixes).
    - ASoC: SOF: ipc4-control: If there is no data do not send bytes update (git-fixes).
    - Add bugnumber to existing mana and mana_ib changes (bsc#1251135 bsc#1251971).
    - HID: apple: Add EPOMAKER TH87 to the non-apple keyboards list (bsc#1258455).
    - HID: intel-ish-hid: Update ishtp bus match to support device ID table (stable-fixes).
    - PCI/DOE: Poll DOE Busy bit for up to 1 second in pci_doe_send_req() (bsc#1255868).
    - PCI: Add ASPEED vendor ID to pci_ids.h (bsc#1258672)
    - PCI: Add PCI_BRIDGE_NO_ALIAS quirk for ASPEED AST1150 (bsc#1258672)
    - PM: sleep: wakeirq: Update outdated documentation comments (git-fixes).
    - Refresh and move upstreamed ath12k patch into sorted section
    - Update drm/mgag200: fix mgag200_bmc_stop_scanout() bug number (bsc#1258153)
    - add bugnumber to existing mana change (bsc#1252266).
    - arm64: contpte: fix set_access_flags() no-op check for SMMU/ATS (bsc#1259329)
    - bonding: only set speed/duplex to unknown, if getting speed failed (bsc#1253691).
    - can: bcm: fix locking for bcm_op runtime updates (git-fixes).
    - clk: qcom: gcc-sm8450: Update the SDCC RCGs to use shared_floor_ops (git-fixes).
    - clocksource: Fix the CPUs' choice in the watchdog per CPU verification (bsc#1257818).
    - clocksource: Print durations for sync check unconditionally (bsc#1257818).
    - clocksource: Reduce watchdog readout delay limit to prevent false positives (bsc#1257818).
    - clocksource: Use pr_info() for Checking clocksource synchronization message (bsc#1257818).
    - dm: Fix deadlock when reloading a multipath table (bsc#1254928).
    - drm/i915/display: Add quirk to skip retraining of dp link (bsc#1253129).
    - ext4: fix iloc.bh leak in ext4_xattr_inode_update_ref (git-fixes).
    - gpiolib-acpi: Update file references in the Documentation and MAINTAINERS (git-fixes).
    - i3c: master: Update hot-join flag only on success (git-fixes).
    - ktls, sockmap: Fix missing uncharge operation (bsc#1252008).
    - media: qcom: camss: vfe: Fix out-of-bounds access in vfe_isr_reg_update() (git-fixes).
    - modpost: Ensure exported symbol namespaces are not quoted (bsc#1258489).
    - net: mana: Handle hardware recovery events when probing the device (bsc#1257466).
    - net: mana: Implement ndo_tx_timeout and serialize queue resets per port (bsc#1257472).
    - platform/x86/amd: amd_3d_vcache: Add AMD 3D V-Cache optimizer driver (jsc#PED-11563).
    - sched/core: Avoid direct access to hrtimer clockbase (bsc#1234634).
    - sched/deadline: Fix race in push_dl_task() (bsc#1234634).
    - sched/deadline: Stop dl_server before CPU goes offline (bsc#1234634).
    - sched/fair: Fix pelt clock sync when entering idle (bsc#1234634).
    - sched/fair: Fix pelt lost idle time detection (bsc#1234634).
    - staging: rtl8723bs: fix missing status update on sdio_alloc_irq() failure (stable-fixes).
    - wifi: cfg80211: Fix use_for flag update on BSS refresh (git-fixes).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1041-1 advisory.

    The SUSE Linux Enterprise 15 SP6 kernel was updated to receive various security bugfixes.


    The following security bugs were fixed:

    - CVE-2023-53817: crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() (bsc#1254992).
    - CVE-2024-38542: RDMA/mana_ib: boundary check before installing cq callbacks (bsc#1226591).
    - CVE-2025-37861: scsi: mpi3mr: Synchronous access b/w reset and tm thread for reply queue (bsc#1243055).
    - CVE-2025-39817: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare (bsc#1249998).
    - CVE-2025-39964: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg (bsc#1251966).
    - CVE-2025-40099: cifs: parse_dfs_referrals: prevent oob on malformed input (bsc#1252911).
    - CVE-2025-40103: smb: client: Fix refcount leak for cifs_sb_tlink (bsc#1252924).
    - CVE-2025-40253: s390/ctcm: Fix double-kfree (bsc#1255084).
    - CVE-2025-71066: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change     (bsc#1256645).
    - CVE-2025-71113: crypto: af_alg - zero initialize memory allocated via sock_kmalloc (bsc#1256716).
    - CVE-2025-71231: crypto: iaa - Fix out-of-bounds index in find_empty_iaa_compression_mode (bsc#1258424).
    - CVE-2026-23004: dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list() (bsc#1257231).
    - CVE-2026-23060: crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec     (bsc#1257735).
    - CVE-2026-23074: net/sched: Enforce that teql can only be used as root qdisc (bsc#1257749).
    - CVE-2026-23089: ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free() (bsc#1257790).
    - CVE-2026-23111: netfilter: nf_tables: fix inverted genmask check in nft_map_catchall_activate()     (bsc#1258181).
    - CVE-2026-23141: btrfs: send: check for inline extents in range_is_hole_in_parent() (bsc#1258377).
    - CVE-2026-23191: ALSA: aloop: Fix racy access at PCM trigger (bsc#1258395).
    - CVE-2026-23204: net/sched: cls_u32: use skb_header_pointer_careful() (bsc#1258340).
    - CVE-2026-23209: macvlan: fix error recovery in macvlan_common_newlink() (bsc#1258518).
    - CVE-2026-23214: btrfs: reject new transactions if the fs is fully read-only (bsc#1258464).
    - CVE-2026-23268: apparmor: fix unprivileged local user can do privileged policy management (bsc#1258850).
    - CVE-2026-23269: apparmor: validate DFA start states are in bounds in unpack_pdb (bsc#1259857).


Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0962-1 advisory.

    The SUSE Linux Enterprise 15 SP7 RT kernel was updated to receive various security bugfixes.


    The following security bugs were fixed:

    - CVE-2023-53817: crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() (bsc#1254992).
    - CVE-2025-39748: bpf: Forget ranges when refining tnum after JSET (bsc#1249587).
    - CVE-2025-39817: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare (bsc#1249998).
    - CVE-2025-39964: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg (bsc#1251966).
    - CVE-2025-40099: cifs: parse_dfs_referrals: prevent oob on malformed input (bsc#1252911).
    - CVE-2025-40103: smb: client: Fix refcount leak for cifs_sb_tlink (bsc#1252924).
    - CVE-2025-40201: kernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64()     paths
    - CVE-2025-40253: s390/ctcm: Fix double-kfree (bsc#1255084).
    - CVE-2025-68283: libceph: replace BUG_ON with bounds check for map->max_osd (bsc#1255379).
    - CVE-2025-68295: smb: client: fix memory leak in cifs_construct_tcon() (bsc#1255129).
    - CVE-2025-68374: md: fix rcu protection in md_wakeup_thread (bsc#1255530).
    - CVE-2025-68735: drm/panthor: Prevent potential UAF in group creation (bsc#1255811).
    - CVE-2025-68736: landlock: Fix handling of disconnected directories (bsc#1255698).
    - CVE-2025-68778: btrfs: don't log conflicting inode if it's a dir moved in the current transaction     (bsc#1256683).
    - CVE-2025-68785: net: openvswitch: fix middle attribute validation in push_nsh() action (bsc#1256640).
    - CVE-2025-68810: KVM: Disallow toggling KVM_MEM_GUEST_MEMFD on an existing memslot (bsc#1256679).
    - CVE-2025-71071: iommu/mediatek: fix use-after-free on probe deferral (bsc#1256802).
    - CVE-2025-71104: KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer     (bsc#1256708).
    - CVE-2025-71113: crypto: af_alg - zero initialize memory allocated via sock_kmalloc (bsc#1256716).
    - CVE-2025-71125: tracing: Do not register unsupported perf events (bsc#1256784).
    - CVE-2025-71126: mptcp: reset fallback status gracefully at disconnect() time (bsc#1256755).
    - CVE-2025-71148: net/handshake: restore destructor on submit failure (bsc#1257159).
    - CVE-2025-71184: btrfs: fix NULL dereference on root when tracing inode eviction (bsc#1257635).
    - CVE-2025-71194: btrfs: fix deadlock in wait_current_trans() due to ignored transaction type     (bsc#1257687).
    - CVE-2025-71225: md: suspend array while updating raid_disks via sysfs (bsc#1258411).
    - CVE-2026-22979: net: fix memory leak in skb_segment_list for GRO packets (bsc#1257228).
    - CVE-2026-22982: net: mscc: ocelot: Fix crash when adding interface under a lag (bsc#1257179).
    - CVE-2026-22998: nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec (bsc#1257209).
    - CVE-2026-23003: geneve: Fix incorrect inner network header offset when innerprotoinherit is set     (bsc#1257246).
    - CVE-2026-23004: dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list() (bsc#1257231).
    - CVE-2026-23010: ipv6: Fix use-after-free in inet6_addr_del() (bsc#1257332).
    - CVE-2026-23017: idpf: fix error handling in the init_task on load (bsc#1257552).
    - CVE-2026-23023: idpf: fix memory leak in idpf_vport_rel() (bsc#1257556).
    - CVE-2026-23035: net/mlx5e: Pass netdev to mlx5e_destroy_netdev instead of priv (bsc#1257559).
    - CVE-2026-23053: NFS: Fix a deadlock involving nfs_release_folio() (bsc#1257718).
    - CVE-2026-23057: vsock/virtio: Coalesce only linear skb (bsc#1257740).
    - CVE-2026-23060: crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec     (bsc#1257735).
    - CVE-2026-23064: net/sched: act_ife: avoid possible NULL deref (bsc#1257765).
    - CVE-2026-23069: vsock/virtio: fix potential underflow in virtio_transport_get_credit() (bsc#1257755).
    - CVE-2026-23070: Octeontx2-af: Add proper checks for fwdata (bsc#1257709).
    - CVE-2026-23074: net/sched: Enforce that teql can only be used as root qdisc (bsc#1257749).
    - CVE-2026-23083: fou: Don't allow 0 for FOU_ATTR_IPPROTO (bsc#1257745).
    - CVE-2026-23084: be2net: Fix NULL pointer dereference in be_cmd_get_mac_from_list (bsc#1257830).
    - CVE-2026-23085: irqchip/gic-v3-its: Avoid truncating memory addresses (bsc#1257758).
    - CVE-2026-23086: vsock/virtio: cap TX credit to local buffer size (bsc#1257757).
    - CVE-2026-23088: tracing: Fix crash on synthetic stacktrace field usage (bsc#1257814).
    - CVE-2026-23089: ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free() (bsc#1257790).
    - CVE-2026-23095: gue: Fix skb memleak with inner IP protocol 0 (bsc#1257808).
    - CVE-2026-23099: bonding: limit BOND_MODE_8023AD to Ethernet devices (bsc#1257816).
    - CVE-2026-23102: arm64/fpsimd: signal: Mandate SVE payload for streaming-mode state (bsc#1257772).
    - CVE-2026-23104: ice: fix devlink reload call trace (bsc#1257763).
    - CVE-2026-23105: net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag     (bsc#1257775).
    - CVE-2026-23107: arm64/fpsimd: signal: Allocate SSVE storage when restoring ZA (bsc#1257762).
    - CVE-2026-23110: scsi: core: Wake up the error handler when final completions race against each other     (bsc#1257761).
    - CVE-2026-23111: netfilter: nf_tables: fix inverted genmask check in nft_map_catchall_activate()     (bsc#1258181).
    - CVE-2026-23112: nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec (bsc#1258184).
    - CVE-2026-23113: io_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop (bsc#1258278).
    - CVE-2026-23116: pmdomain: imx8m-blk-ctrl: Remove separate rst and clk mask for 8mq vpu (bsc#1258277).
    - CVE-2026-23119: bonding: provide a net pointer to __skb_flow_dissect() (bsc#1258273).
    - CVE-2026-23125: sctp: move SCTP_CMD_ASSOC_SHKEY right after SCTP_CMD_PEER_INIT (bsc#1258293).
    - CVE-2026-23139: netfilter: nf_conncount: update last_gc only when GC has been performed (bsc#1258304).
    - CVE-2026-23141: btrfs: send: check for inline extents in range_is_hole_in_parent() (bsc#1258377).
    - CVE-2026-23154: net: fix segmentation of forwarding fraglist GRO (bsc#1258286).
    - CVE-2026-23166: ice: Fix NULL pointer dereference in ice_vsi_set_napi_queues (bsc#1258272).
    - CVE-2026-23169: mptcp: fix race in mptcp_pm_nl_flush_addrs_doit() (bsc#1258389).
    - CVE-2026-23171: net: bonding: update the slave array for broadcast mode (bsc#1258349).
    - CVE-2026-23173: net/mlx5e: TC, delete flows only for existing peers (bsc#1258520).
    - CVE-2026-23179: nvmet-tcp: fixup hang in nvmet_tcp_listen_data_ready() (bsc#1258394).
    - CVE-2026-23191: ALSA: aloop: Fix racy access at PCM trigger (bsc#1258395).
    - CVE-2026-23198: KVM: Don't clobber irqfd routing type when deassigning irqfd (bsc#1258321).
    - CVE-2026-23204: net/sched: cls_u32: use skb_header_pointer_careful() (bsc#1258340).
    - CVE-2026-23208: ALSA: usb-audio: Prevent excessive number of frames (bsc#1258468).
    - CVE-2026-23209: macvlan: fix error recovery in macvlan_common_newlink() (bsc#1258518).
    - CVE-2026-23210: ice: Fix PTP NULL pointer dereference during VSI rebuild (bsc#1258517).
    - CVE-2026-23213: drm/amd/pm: Disable MMIO access during SMU Mode 1 reset (bsc#1258465).
    - CVE-2026-23214: btrfs: reject new transactions if the fs is fully read-only (bsc#1258464).
    - CVE-2026-23268: apparmor: fix unprivileged local user can do privileged policy management
    - CVE-2026-23269: apparmor: validate DFA start states are in bounds in unpack_pdb


Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - btrfs: do not strictly require dirty metadata threshold for metadata writepages [BUG] There is an internal     report that over 1000 processes are waiting at the io_schedule_timeout() of balance_dirty_pages(), causing     a system hang and trigger a kernel coredump. The kernel is v6.4 kernel based, but the root problem still     applies to any upstream kernel before v6.18. [CAUSE] From Jan Kara for his wisdom on the dirty page     balance behavior first. This cgroup dirty limit was what was actually playing the role here because the     cgroup had only a small amount of memory and so the dirty limit for it was something like 16MB. Dirty     throttling is responsible for enforcing that nobody can dirty (significantly) more dirty memory than     there's dirty limit. Thus when a task is dirtying pages it periodically enters into balance_dirty_pages()     and we let it sleep there to slow down the dirtying. When the system is over dirty limit already (either     globally or within a cgroup of the running task), we will not let the task exit from balance_dirty_pages()     until the number of dirty pages drops below the limit. So in this particular case, as I already mentioned,     there was a cgroup with relatively small amount of memory and as a result with dirty limit set at 16MB. A     task from that cgroup has dirtied about 28MB worth of pages in btrfs btree inode and these were     practically the only dirty pages in that cgroup. So that means the only way to reduce the dirty pages of     that cgroup is to writeback the dirty pages of btrfs btree inode, and only after that those processes can     exit balance_dirty_pages(). Now back to the btrfs part, btree_writepages() is responsible for writing back     dirty btree inode pages. The problem here is, there is a btrfs internal threshold that if the btree     inode's dirty bytes are below the 32M threshold, it will not do any writeback. This behavior is to batch     as much metadata as possible so we won't write back those tree blocks and then later re-COW them again for     another modification. This internal 32MiB is higher than the existing dirty page size (28MiB), meaning no     writeback will happen, causing a deadlock between btrfs and cgroup: - Btrfs doesn't want to write back     btree inode until more dirty pages - Cgroup/MM doesn't want more dirty pages for btrfs btree inode Thus     any process touching that btree inode is put into sleep until the number of dirty pages is reduced. Thanks     Jan Kara a lot for the analysis of the root cause. [ENHANCEMENT] Since kernel commit b55102826d7d (btrfs:
    set AS_KERNEL_FILE on the btree_inode), btrfs btree inode pages will only be charged to the root cgroup     which should have a much larger limit than btrfs' 32MiB threshold. So it should not affect newer kernels.
    But for all current LTS kernels, they are all affected by this problem, and backporting the whole     AS_KERNEL_FILE may not be a good idea. Even for newer kernels I still think it's a good idea to get rid of     the internal threshold at btree_writepages(), since for most cases cgroup/MM has a better view of full     system memory usage than btrfs' fixed threshold. For internal callers using btrfs_btree_balance_dirty()     since that function is already doing internal threshold check, we don't need to bother them. But for     external callers of btree_writepages(), just respect their requests and write back whatever they want,     ignoring the internal btrfs threshold to avoid such deadlock on btree inode dirty page balancing.
    (CVE-2026-23157)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
306005	Photon OS 5.0: Linux PHSA-2026-5.0-0813	Nessus	PhotonOS Local Security Checks	high
305231	Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-1543)	Nessus	Amazon Linux Local Security Checks	high
304219	openSUSE 16 Security Update : kernel (openSUSE-SU-2026:20416-1)	Nessus	SuSE Local Security Checks	critical
303965	SUSE SLED15 / SLES15 : Recommended update for initial livepatch (SUSE-SU-2026:1081-1)	Nessus	SuSE Local Security Checks	critical
303788	SUSE SLES15 / openSUSE 15 : Recommended update for initial livepatch (SUSE-SU-2026:1041-1)	Nessus	SuSE Local Security Checks	high
303406	SUSE SLES15 Security Update : kernel (SUSE-SU-2026:0962-1)	Nessus	SuSE Local Security Checks	critical
299067	Linux Distros Unpatched Vulnerability : CVE-2026-23157	Nessus	Misc.	medium

Detections

Analytics

CVE-2026-23157

medium

Tenable Plugins

high

high

critical

critical

high

critical

medium