In the Linux kernel, the following vulnerability has been resolved: btrfs: fix the inode leak in btrfs_iget() [BUG] There is a bug report that a syzbot reproducer can lead to the following busy inode at unmount time: BTRFS info (device loop1): last unmount of filesystem 1680000e-3c1e-4c46-84b6-56bd3909af50 VFS: Busy inodes after unmount of loop1 (btrfs) ------------[ cut here ]------------ kernel BUG at fs/super.c:650! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 48168 Comm: syz-executor Not tainted 6.15.0-rc2-00471-g119009db2674 #2 PREEMPT(full) Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:generic_shutdown_super+0x2e9/0x390 fs/super.c:650 Call Trace: <TASK> kill_anon_super+0x3a/0x60 fs/super.c:1237 btrfs_kill_super+0x3b/0x50 fs/btrfs/super.c:2099 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super fs/super.c:506 [inline] deactivate_super+0xe2/0x100 fs/super.c:502 cleanup_mnt+0x21f/0x440 fs/namespace.c:1435 task_work_run+0x14d/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x269/0x290 kernel/entry/common.c:218 do_syscall_64+0xd4/0x250 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK> [CAUSE] When btrfs_alloc_path() failed, btrfs_iget() directly returned without releasing the inode already allocated by btrfs_iget_locked(). This results the above busy inode and trigger the kernel BUG. [FIX] Fix it by calling iget_failed() if btrfs_alloc_path() failed. If we hit error inside btrfs_read_locked_inode(), it will properly call iget_failed(), so nothing to worry about. Although the iget_failed() cleanup inside btrfs_read_locked_inode() is a break of the normal error handling scheme, let's fix the obvious bug and backport first, then rework the error handling later.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20287-1 advisory.

    The SUSE Linux Enterprise 16.0 and SL MIxro 6.2 kernel was updated to fix various security issues

    The following security issues were fixed:

    - CVE-2025-40147: blk-throttle: fix access race during throttle policy activation (bsc#1253344).
    - CVE-2025-40257: mptcp: fix a race in mptcp_pm_del_add_timer() (bsc#1254842).
    - CVE-2025-40259: scsi: sg: Do not sleep in atomic context (bsc#1254845).
    - CVE-2025-40261: nvme: nvme-fc: Ensure ->ioerr_work is cancelled in nvme_fc_delete_ctrl() (bsc#1254839).
    - CVE-2025-40363: net: ipv6: fix field-spanning memcpy warning in AH output (bsc#1255102).
    - CVE-2025-68174: amd/amdkfd: enhance kfd process check in switch partition (bsc#1255327).
    - CVE-2025-68178: blk-cgroup: fix possible deadlock while configuring policy (bsc#1255266).
    - CVE-2025-68188: tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check() (bsc#1255269).
    - CVE-2025-68200: bpf: Add bpf_prog_run_data_pointers() (bsc#1255241).
    - CVE-2025-68211: ksm: use range-walk function to jump over holes in scan_get_next_rmap_item     (bsc#1255319).
    - CVE-2025-68218: nvme-multipath: fix lockdep WARN due to partition scan work (bsc#1255245).
    - CVE-2025-68227: mptcp: Fix proto fallback detection with BPF (bsc#1255216).
    - CVE-2025-68241: ipv4: route: Prevent rt_bind_exception() from rebinding stale fnhe (bsc#1255157).
    - CVE-2025-68245: net: netpoll: fix incorrect refcount handling causing incorrect cleanup (bsc#1255268).
    - CVE-2025-68261: ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock() (bsc#1255164).
    - CVE-2025-68296: drm, fbcon, vga_switcheroo: Avoid race condition in fbcon setup (bsc#1255128).
    - CVE-2025-68297: ceph: fix crash in process_v2_sparse_read() for encrypted directories (bsc#1255403).
    - CVE-2025-68320: lan966x: Fix sleeping in atomic context (bsc#1255172).
    - CVE-2025-68325: net/sched: sch_cake: Fix incorrect qlen reduction in cake_drop (bsc#1255417).
    - CVE-2025-68337: jbd2: avoid bug_on in jbd2_journal_get_create_access() when file system corrupted     (bsc#1255482).
    - CVE-2025-68341: veth: reduce XDP no_direct return section to fix race (bsc#1255506).
    - CVE-2025-68348: block: fix memory leak in __blkdev_issue_zero_pages (bsc#1255694).
    - CVE-2025-68349: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid     (bsc#1255544).
    - CVE-2025-68356: gfs2: Prevent recursive memory reclaim (bsc#1255593).
    - CVE-2025-68359: btrfs: fix double free of qgroup record after failure to add delayed ref head     (bsc#1255542).
    - CVE-2025-68360: wifi: mt76: wed: use proper wed reference in mt76 wed driver callabacks (bsc#1255536).
    - CVE-2025-68361: erofs: limit the level of fs stacking for file-backed mounts (bsc#1255526).
    - CVE-2025-68366: nbd: defer config unlock in nbd_genl_connect (bsc#1255622).
    - CVE-2025-68367: macintosh/mac_hid: fix race condition in mac_hid_toggle_emumouse (bsc#1255547).
    - CVE-2025-68368: md: init bioset in mddev_init (bsc#1255527).
    - CVE-2025-68372: nbd: defer config put in recv_work (bsc#1255537).
    - CVE-2025-68374: md: fix rcu protection in md_wakeup_thread (bsc#1255530).
    - CVE-2025-68376: coresight: ETR: Fix ETR buffer use-after-free issue (bsc#1255529).
    - CVE-2025-68379: RDMA/rxe: Fix null deref on srq->rq.queue after resize failure (bsc#1255695).
    - CVE-2025-68735: drm/panthor: Prevent potential UAF in group creation (bsc#1255811).
    - CVE-2025-68741: scsi: qla2xxx: Fix improper freeing of purex item (bsc#1255703).
    - CVE-2025-68743: mshv: Fix create memory region overlap check (bsc#1255708).
    - CVE-2025-68764: NFS: Automounted filesystems should inherit ro,noexec,nodev,sync flags (bsc#1255930).
    - CVE-2025-68768: inet: frags: add inet_frag_queue_flush() (bsc#1256579).
    - CVE-2025-68770: bnxt_en: Fix XDP_TX path (bsc#1256584).
    - CVE-2025-68771: ocfs2: fix kernel BUG in ocfs2_find_victim_chain (bsc#1256582).
    - CVE-2025-68775: net/handshake: duplicate handshake cancellations leak socket (bsc#1256665).
    - CVE-2025-68776: net/hsr: fix NULL pointer dereference in prp_get_untagged_frame() (bsc#1256659).
    - CVE-2025-68784: xfs: fix a UAF problem in xattr repair (bsc#1256793).
    - CVE-2025-68788: fsnotify: do not generate ACCESS/MODIFY events on child for special files (bsc#1256638).
    - CVE-2025-68792: tpm2-sessions: Fix out of range indexing in name_size (bsc#1256656).
    - CVE-2025-68795: ethtool: Avoid overflowing userspace buffer on stats query (bsc#1256688).
    - CVE-2025-68798: perf/x86/amd: Check event before enable to avoid GPF (bsc#1256689).
    - CVE-2025-68799: caif: fix integer underflow in cffrml_receive() (bsc#1256643).
    - CVE-2025-68800: mlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats     (bsc#1256646).
    - CVE-2025-68801: mlxsw: spectrum_router: Fix neighbour use-after-free (bsc#1256653).
    - CVE-2025-68803: NFSD: NFSv4 file creation neglects setting ACL (bsc#1256770).
    - CVE-2025-68811: svcrdma: use rc_pageoff for memcpy byte offset (bsc#1256677).
    - CVE-2025-68813: ipvs: fix ipv4 null-ptr-deref in route error path (bsc#1256641).
    - CVE-2025-68814: io_uring: fix filename leak in __io_openat_prep() (bsc#1256651).
    - CVE-2025-68815: net/sched: ets: Remove drr class from the active list if it changes to strict     (bsc#1256680).
    - CVE-2025-68816: net/mlx5: fw_tracer, Validate format string parameters (bsc#1256674).
    - CVE-2025-68820: ext4: xattr: fix null pointer deref in ext4_raw_inode() (bsc#1256754).
    - CVE-2025-68821: fuse: fix readahead reclaim deadlock (bsc#1256667).
    - CVE-2025-71064: net: hns3: using the num_tqps in the vf driver to apply for resources (bsc#1256654).
    - CVE-2025-71066: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change     (bsc#1256645).
    - CVE-2025-71077: tpm: Cap the number of PCR banks (bsc#1256613).
    - CVE-2025-71080: ipv6: fix a BUG in rt6_get_pcpu_route() under PREEMPT_RT (bsc#1256608).
    - CVE-2025-71084: RDMA/cm: Fix leaking the multicast GID table reference (bsc#1256622).
    - CVE-2025-71085: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() (bsc#1256623).
    - CVE-2025-71087: iavf: fix off-by-one issues in iavf_config_rss_reg() (bsc#1256628).
    - CVE-2025-71088: mptcp: fallback earlier on simult connection (bsc#1256630).
    - CVE-2025-71089: iommu: disable SVA when CONFIG_X86 is set (bsc#1256612).
    - CVE-2025-71091: team: fix check for port enabled in team_queue_override_port_prio_changed()     (bsc#1256773).
    - CVE-2025-71093: e1000: fix OOB in e1000_tbi_should_accept() (bsc#1256777).
    - CVE-2025-71094: net: usb: asix: ax88772: Increase phy_name size (bsc#1256597).
    - CVE-2025-71095: net: stmmac: fix the crash issue for zero copy XDP_TX action (bsc#1256605).
    - CVE-2025-71097: ipv4: Fix reference count leak when using error routes with nexthop objects     (bsc#1256607).
    - CVE-2025-71098: ip6_gre: make ip6gre_header() robust (bsc#1256591).
    - CVE-2025-71112: net: hns3: add VLAN id validation before using (bsc#1256726).
    - CVE-2025-71116: libceph: make decode_pool() more resilient against corrupted osdmaps (bsc#1256744).
    - CVE-2025-71120: SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf     (bsc#1256779).
    - CVE-2025-71123: ext4: fix string copying in parse_apply_sb_mount_options() (bsc#1256757).
    - CVE-2025-71126: mptcp: avoid deadlock on fallback while reinjecting (bsc#1256755).
    - CVE-2025-71132: smc91x: fix broken irq-context in PREEMPT_RT (bsc#1256737).
    - CVE-2025-71133: RDMA/irdma: avoid invalid read in irdma_net_event (bsc#1256733).
    - CVE-2025-71135: md/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt()     (bsc#1256761).
    - CVE-2025-71137: octeontx2-pf: fix UBSAN: shift-out-of-bounds error (bsc#1256760).
    - CVE-2025-71148: net/handshake: restore destructor on submit failure (bsc#1257159).
    - CVE-2025-71149: io_uring/poll: correctly handle io_poll_add() return value on update (bsc#1257164).
    - CVE-2025-71156: gve: defer interrupt enabling until NAPI registration (bsc#1257167).
    - CVE-2025-71157: RDMA/core: always drop device refcount in ib_del_sub_device_and_put() (bsc#1257168).
    - CVE-2026-22976: net/sched: sch_qfq: Fix NULL deref when deactivating inactive aggregate in qfq_reset     (bsc#1257035).
    - CVE-2026-22977: net: sock: fix hardened usercopy panic in sock_recv_errqueue (bsc#1257053).
    - CVE-2026-22981: idpf: detach and close netdevs while handling a reset (bsc#1257225).
    - CVE-2026-22982: net: mscc: ocelot: Fix crash when adding interface under a lag (bsc#1257179).
    - CVE-2026-22984: libceph: prevent potential out-of-bounds reads in handle_auth_done() (bsc#1257217).
    - CVE-2026-22986: gpiolib: fix race condition for gdev->srcu (bsc#1257276).
    - CVE-2026-22990: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (bsc#1257221).
    - CVE-2026-22991: libceph: make free_choose_arg_map() resilient to partial allocation (bsc#1257220).
    - CVE-2026-22992: libceph: return the handler error from mon_handle_auth_done() (bsc#1257218).
    - CVE-2026-22993: idpf: Fix RSS LUT NULL pointer crash on early ethtool operations (bsc#1257180).
    - CVE-2026-22996: net/mlx5e: Don't store mlx5e_priv in mlx5e_dev devlink priv.
    - CVE-2026-22999: net/sched: sch_qfq: do not free existing class in qfq_change_class() (bsc#1257236).
    - CVE-2026-23000: net/mlx5e: Fix crash on profile change rollback failure (bsc#1257234).
    - CVE-2026-23001: macvlan: fix possible UAF in macvlan_forward_source() (bsc#1257232).
    - CVE-2026-23005: x86/fpu: Clear XSTATE_BV in guest XSAVE state whenever XFD[i]=1 (bsc#1257245).
    - CVE-2026-23011: ipv4: ip_gre: make ipgre_header() robust (bsc#1257207).

    The following non security issues were fixed:

    - ALSA: usb-audio: Update for native DSD support quirks (stable-fixes).
    - Add bugnumber to an existing hv_netvsc change (bsc#1257473).
    - Fix locking issue introduced by a CVE backport (bsc#1256975 bsc#1254977).
    - Update config files: disable CONFIG_DEVPORT for arm64 (bsc#1256792)
    - arm64: Update config files. Disable DEVPORT (bsc#1256792)
    - bpf/selftests: test_select_reuseport_kern: Remove unused header (bsc#1257603).
    - bpf: Do not let BPF test infra emit invalid GSO types to stack (bsc#1255569).
    - btrfs: pass fs_info to btrfs_delete_ref_head() (git-fixes).
    - btrfs: scrub: always update btrfs_scrub_progress::last_physical (git-fixes).
    - bus: fsl-mc: Constify fsl_mc_device_match() (jsc#PED-10906 git-fixes).
    - drm/imagination: Wait for FW trace update command completion (git-fixes).
    - drm/msm/a6xx: fix bogus hwcg register updates (git-fixes).
    - ice: use netif_get_num_default_rss_queues() (bsc#1247712).
    - libbpf: Fix -Wdiscarded-qualifiers under C23 (bsc#1257309).
    - mm, page_alloc, thp: prevent reclaim for __GFP_THISNODE THP allocations (bsc#1254447 bsc#1253087).
    - net: mana: Fix incorrect speed reported by debugfs (bsc#1255232).
    - net: mana: Support HW link state events (bsc#1253049).
    - nfsd: adjust WARN_ON_ONCE in revoke_delegation (bsc#1257015).
    - nvme: nvme-fc: move tagset removal to nvme_fc_delete_ctrl() (git-fixes).
    - powerpc/addnote: Fix overflow on 32-bit builds (bsc#1215199).
    - sched/fair: Disable scheduler feature NEXT_BUDDY (bsc#1255459).
    - scsi: lpfc: Rework lpfc_sli4_fcf_rr_next_index_get() (bsc#1256864).
    - scsi: lpfc: Update lpfc version to 14.4.0.13 (bsc#1256864).
    - scsi: qla2xxx: Add Speed in SFP print information (bsc#1256865 bsc#1256867 jsc#PED-14156).
    - scsi: qla2xxx: Add bsg interface to support firmware img validation (bsc#1256865 bsc#1256867     jsc#PED-14156).
    - scsi: qla2xxx: Add load flash firmware mailbox support for 28xxx (bsc#1256865 bsc#1256867     jsc#PED-14156).
    - scsi: qla2xxx: Add support for 64G SFP speed (bsc#1256865 bsc#1256867 jsc#PED-14156).
    - scsi: qla2xxx: Allow recovery for tape devices (bsc#1256865 bsc#1256867 jsc#PED-14156).
    - scsi: qla2xxx: Delay module unload while fabric scan in progress (bsc#1256865 bsc#1256867     jsc#PED-14156).
    - scsi: qla2xxx: Fix bsg_done() causing double free (bsc#1256865 bsc#1256867 jsc#PED-14156).
    - scsi: qla2xxx: Free sp in error path to fix system crash (bsc#1256865 bsc#1256867 jsc#PED-14156).
    - scsi: qla2xxx: Query FW again before proceeding with login (bsc#1256865 bsc#1256867 jsc#PED-14156).
    - scsi: qla2xxx: Update version to 10.02.10.100-k (bsc#1256865 bsc#1256867 jsc#PED-14156).
    - scsi: qla2xxx: Validate MCU signature before executing MBC 03h (bsc#1256865 bsc#1256867 jsc#PED-14156).
    - scsi: qla2xxx: Validate sp before freeing associated memory (bsc#1256865 bsc#1256867 jsc#PED-14156).
    - scsi: storvsc: Process unsupported MODE_SENSE_10 (bsc#1257296).
    - selftests: net: fib-onlink-tests: Convert to use namespaces by default (bsc#1255346).
    - slimbus: core: Constify slim_eaddr_equal() (jsc#PED-10906 git-fixes).
    - smb: client: split cached_fid bitfields to avoid shared-byte RMW races (bsc#1250748,bsc#1257154).
    - smb: client: update cfid->last_access_time in open_cached_dir_by_dentry() (git-fixes).
    - smb: improve directory cache reuse for readdir operations (bsc#1252712).
    - tsm-mr: Add TVM Measurement Register support (bsc#1257504).
    - tsm-mr: Add tsm-mr sample code (bsc#1257504).
    - virt: tdx-guest: Expose TDX MRs as sysfs attributes (bsc#1257504).
    - virt: tdx-guest: Refactor and streamline TDREPORT generation (bsc#1257504).
    - virt: tdx-guest: Transition to scoped_cond_guard for mutex operations (bsc#1257504).
    - wifi: mwifiex: Fix a loop in mwifiex_update_ampdu_rxwinsize() (git-fixes).
    - x86/tdx: Add tdx_mcall_extend_rtmr() interface (bsc#1257504).
    - x86/tdx: tdx_mcall_get_report0: Return -EBUSY on TDCALL_OPERAND_BUSY error (bsc#1257504).

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 Ubuntu 25.04 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7721-1 advisory.

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to     compromise the system. This update corrects flaws in the following subsystems:

    - ARM64 architecture;

    - PA-RISC architecture;

    - PowerPC architecture;

    - RISC-V architecture;

    - S390 architecture;

    - x86 architecture;

    - Compute Acceleration Framework;

    - Ublk userspace block driver;

    - Bluetooth drivers;

    - Buffer Sharing and Synchronization framework;

    - DMA engine subsystem;

    - ARM SCMI message protocol;

    - GPU drivers;

    - HID subsystem;

    - IIO ADC drivers;

    - IIO subsystem;

    - InfiniBand drivers;

    - Input Device core drivers;

    - IOMMU subsystem;

    - IRQ chip drivers;

    - Multiple devices driver;

    - Network drivers;

    - Mellanox network drivers;

    - PCI subsystem;

    - PHY drivers;

    - PTP clock framework;

    - Voltage and Current Regulator drivers;

    - SPI subsystem;

    - VideoCore services drivers;

    - USB Type-C Connector System Software Interface driver;

    - Xen hypervisor drivers;

    - BTRFS file system;

    - EROFS file system;

    - Network file system (NFS) client;

    - File systems infrastructure;

    - SMB network file system;

    - Network traffic control;

    - eXpress Data Path;

    - Universal MIDI packet (UMP) support module;

    - io_uring subsystem;

    - Kernel command line parsing driver;

    - Scheduler infrastructure;

    - Tracing infrastructure;

    - Memory management;

    - Networking core;

    - IPv4 networking;

    - IPv6 networking;

    - MAC80211 subsystem;

    - Management Component Transport Protocol (MCTP);

    - Netfilter;

    - Open vSwitch;

    - TLS protocol;

    - Wireless networking;

    - AMD SoC Alsa drivers;

    - SoC Audio generic drivers;

    - SOF drivers; (CVE-2025-37959, CVE-2025-37927, CVE-2025-37891, CVE-2025-37906, CVE-2025-37962,     CVE-2025-37972, CVE-2025-37919, CVE-2025-37958, CVE-2025-37929, CVE-2025-37969, CVE-2025-37949,     CVE-2025-37916, CVE-2025-38027, CVE-2025-37968, CVE-2025-37931, CVE-2025-37923, CVE-2025-37918,     CVE-2025-37998, CVE-2025-37907, CVE-2025-37894, CVE-2025-38028, CVE-2025-37915, CVE-2025-38008,     CVE-2025-37946, CVE-2025-38020, CVE-2025-37926, CVE-2025-37950, CVE-2025-38216, CVE-2025-37973,     CVE-2025-38014, CVE-2025-37963, CVE-2025-38009, CVE-2025-38010, CVE-2025-37971, CVE-2025-38012,     CVE-2025-38094, CVE-2025-37955, CVE-2025-37904, CVE-2025-38095, CVE-2025-37951, CVE-2025-37964,     CVE-2025-37901, CVE-2025-37956, CVE-2025-38016, CVE-2025-37960, CVE-2025-37898, CVE-2025-37992,     CVE-2025-38006, CVE-2025-37993, CVE-2025-37921, CVE-2025-38007, CVE-2025-37930, CVE-2025-37895,     CVE-2025-37897, CVE-2025-37933, CVE-2025-37899, CVE-2025-37967, CVE-2025-38019, CVE-2025-37966,     CVE-2025-37961, CVE-2025-37934, CVE-2025-37952, CVE-2025-37994, CVE-2025-37914, CVE-2025-38083,     CVE-2025-37970, CVE-2025-37965, CVE-2025-38025, CVE-2025-38023, CVE-2025-38015, CVE-2025-37911,     CVE-2025-38056, CVE-2025-37995, CVE-2025-37991, CVE-2025-37920, CVE-2025-38011, CVE-2025-37910,     CVE-2025-37924, CVE-2025-37996, CVE-2025-37948, CVE-2025-37922, CVE-2025-37947, CVE-2025-37912,     CVE-2025-37990, CVE-2025-37909, CVE-2025-38021, CVE-2025-38022, CVE-2025-37908, CVE-2025-37900,     CVE-2025-37999, CVE-2025-37905, CVE-2025-37954, CVE-2025-37974, CVE-2025-38005, CVE-2025-37913,     CVE-2025-37903, CVE-2025-37896, CVE-2025-38002, CVE-2025-37935, CVE-2025-38018, CVE-2025-37936,     CVE-2025-38013, CVE-2025-37957, CVE-2025-37928, CVE-2025-37917, CVE-2025-38024)

Tenable has extracted the preceding description block directly from the Ubuntu 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.

  - In the Linux kernel, the following vulnerability has been resolved: btrfs: fix the inode leak in     btrfs_iget() [BUG] There is a bug report that a syzbot reproducer can lead to the following busy inode at     unmount time: BTRFS info (device loop1): last unmount of filesystem 1680000e-3c1e-4c46-84b6-56bd3909af50     VFS: Busy inodes after unmount of loop1 (btrfs) ------------[ cut here ]------------ kernel BUG at     fs/super.c:650! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 48168 Comm: syz-     executor Not tainted 6.15.0-rc2-00471-g119009db2674 #2 PREEMPT(full) Hardware name: QEMU Ubuntu 24.04 PC     (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:generic_shutdown_super+0x2e9/0x390     fs/super.c:650 Call Trace: <TASK> kill_anon_super+0x3a/0x60 fs/super.c:1237 btrfs_kill_super+0x3b/0x50     fs/btrfs/super.c:2099 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super fs/super.c:506     [inline] deactivate_super+0xe2/0x100 fs/super.c:502 cleanup_mnt+0x21f/0x440 fs/namespace.c:1435     task_work_run+0x14d/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50     [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare     include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207     [inline] syscall_exit_to_user_mode+0x269/0x290 kernel/entry/common.c:218 do_syscall_64+0xd4/0x250     arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK> [CAUSE] When     btrfs_alloc_path() failed, btrfs_iget() directly returned without releasing the inode already allocated by     btrfs_iget_locked(). This results the above busy inode and trigger the kernel BUG. [FIX] Fix it by calling     iget_failed() if btrfs_alloc_path() failed. If we hit error inside btrfs_read_locked_inode(), it will     properly call iget_failed(), so nothing to worry about. Although the iget_failed() cleanup inside     btrfs_read_locked_inode() is a break of the normal error handling scheme, let's fix the obvious bug and     backport first, then rework the error handling later. (CVE-2025-37904)

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

The remote Ubuntu 25.04 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7665-1 advisory.

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to     compromise the system. This update corrects flaws in the following subsystems:

    - ARM64 architecture;

    - PA-RISC architecture;

    - PowerPC architecture;

    - S390 architecture;

    - x86 architecture;

    - Compute Acceleration Framework;

    - Ublk userspace block driver;

    - Bluetooth drivers;

    - ARM SCMI message protocol;

    - GPU drivers;

    - IOMMU subsystem;

    - IRQ chip drivers;

    - Multiple devices driver;

    - Network drivers;

    - PCI subsystem;

    - PTP clock framework;

    - SPI subsystem;

    - BTRFS file system;

    - SMB network file system;

    - eXpress Data Path;

    - Universal MIDI packet (UMP) support module;

    - Tracing infrastructure;

    - Memory management;

    - IPv4 networking;

    - IPv6 networking;

    - Network traffic control;

    - AMD SoC Alsa drivers;

    - SoC Audio generic drivers; (CVE-2025-37901, CVE-2025-37990, CVE-2025-37891, CVE-2025-37918,     CVE-2025-37930, CVE-2025-37909, CVE-2025-37906, CVE-2025-37913, CVE-2025-37927, CVE-2025-37922,     CVE-2025-37899, CVE-2025-37894, CVE-2025-37934, CVE-2025-37911, CVE-2025-37912, CVE-2025-37933,     CVE-2025-37924, CVE-2025-37900, CVE-2025-37907, CVE-2025-37974, CVE-2025-37928, CVE-2025-37914,     CVE-2025-37905, CVE-2025-37921, CVE-2025-37919, CVE-2025-37915, CVE-2025-37910, CVE-2025-37903,     CVE-2025-37936, CVE-2025-37904, CVE-2025-38216, CVE-2025-37923, CVE-2025-37931, CVE-2025-37895,     CVE-2025-37917, CVE-2025-37926, CVE-2025-37916, CVE-2025-37935, CVE-2025-37898, CVE-2025-37897,     CVE-2025-37929, CVE-2025-37908, CVE-2025-37946, CVE-2025-37896, CVE-2025-37920, CVE-2025-37991)

Tenable has extracted the preceding description block directly from the Ubuntu 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 Ubuntu 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7650-1 advisory.

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to     compromise the system. This update corrects flaws in the following subsystems:

    - ARM64 architecture;

    - PA-RISC architecture;

    - PowerPC architecture;

    - S390 architecture;

    - x86 architecture;

    - Compute Acceleration Framework;

    - Ublk userspace block driver;

    - ARM SCMI message protocol;

    - GPU drivers;

    - IOMMU subsystem;

    - IRQ chip drivers;

    - Multiple devices driver;

    - Network drivers;

    - PCI subsystem;

    - PTP clock framework;

    - SPI subsystem;

    - BTRFS file system;

    - SMB network file system;

    - eXpress Data Path;

    - Universal MIDI packet (UMP) support module;

    - Tracing infrastructure;

    - Memory management;

    - IPv4 networking;

    - IPv6 networking;

    - Network traffic control;

    - AMD SoC Alsa drivers;

    - SoC Audio generic drivers; (CVE-2025-37899, CVE-2025-37905, CVE-2025-37916, CVE-2025-37935,     CVE-2025-37923, CVE-2025-37906, CVE-2025-37929, CVE-2025-37907, CVE-2025-37909, CVE-2025-37910,     CVE-2025-37921, CVE-2025-37927, CVE-2025-38216, CVE-2025-37914, CVE-2025-37928, CVE-2025-37915,     CVE-2025-37990, CVE-2025-37917, CVE-2025-37936, CVE-2025-37946, CVE-2025-37934, CVE-2025-37894,     CVE-2025-37898, CVE-2025-37911, CVE-2025-37912, CVE-2025-37920, CVE-2025-37926, CVE-2025-37919,     CVE-2025-37900, CVE-2025-37908, CVE-2025-37924, CVE-2025-37974, CVE-2025-37901, CVE-2025-37903,     CVE-2025-37891, CVE-2025-37922, CVE-2025-37991, CVE-2025-37930, CVE-2025-37896, CVE-2025-37897,     CVE-2025-37913, CVE-2025-37895, CVE-2025-37933, CVE-2025-37904, CVE-2025-37931)

Tenable has extracted the preceding description block directly from the Ubuntu 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 Ubuntu 25.04 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7649-1 advisory.

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to     compromise the system. This update corrects flaws in the following subsystems:

    - ARM64 architecture;

    - PA-RISC architecture;

    - PowerPC architecture;

    - S390 architecture;

    - x86 architecture;

    - Compute Acceleration Framework;

    - Ublk userspace block driver;

    - Bluetooth drivers;

    - ARM SCMI message protocol;

    - GPU drivers;

    - IOMMU subsystem;

    - IRQ chip drivers;

    - Multiple devices driver;

    - Network drivers;

    - PCI subsystem;

    - PTP clock framework;

    - SPI subsystem;

    - BTRFS file system;

    - SMB network file system;

    - eXpress Data Path;

    - Universal MIDI packet (UMP) support module;

    - Tracing infrastructure;

    - Memory management;

    - IPv4 networking;

    - IPv6 networking;

    - Network traffic control;

    - AMD SoC Alsa drivers;

    - SoC Audio generic drivers; (CVE-2025-37898, CVE-2025-37990, CVE-2025-37974, CVE-2025-37991,     CVE-2025-37894, CVE-2025-37906, CVE-2025-37896, CVE-2025-37909, CVE-2025-37923, CVE-2025-37899,     CVE-2025-37901, CVE-2025-37914, CVE-2025-38216, CVE-2025-37931, CVE-2025-37928, CVE-2025-37916,     CVE-2025-37908, CVE-2025-37915, CVE-2025-37917, CVE-2025-37921, CVE-2025-37903, CVE-2025-37922,     CVE-2025-37895, CVE-2025-37936, CVE-2025-37933, CVE-2025-37891, CVE-2025-37926, CVE-2025-37912,     CVE-2025-37920, CVE-2025-37924, CVE-2025-37927, CVE-2025-37946, CVE-2025-37907, CVE-2025-37930,     CVE-2025-37911, CVE-2025-37905, CVE-2025-37900, CVE-2025-37929, CVE-2025-37910, CVE-2025-37913,     CVE-2025-37935, CVE-2025-37919, CVE-2025-37918, CVE-2025-37897, CVE-2025-37904, CVE-2025-37934)

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

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

ID	Name	Product	Family	Severity
300556	openSUSE 16 Security Update : kernel (openSUSE-SU-2026:20287-1)	Nessus	SuSE Local Security Checks	high
258130	Ubuntu 25.04 : Linux kernel (Azure) vulnerabilities (USN-7721-1)	Nessus	Ubuntu Local Security Checks	high
244541	Linux Distros Unpatched Vulnerability : CVE-2025-37904	Nessus	Misc.	medium
242587	Ubuntu 25.04 : Linux kernel (Oracle) vulnerabilities (USN-7665-1)	Nessus	Ubuntu Local Security Checks	medium
242283	Ubuntu 24.04 LTS : Linux kernel (OEM) vulnerabilities (USN-7650-1)	Nessus	Ubuntu Local Security Checks	medium
242280	Ubuntu 25.04 : Linux kernel vulnerabilities (USN-7649-1)	Nessus	Ubuntu Local Security Checks	medium

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CVE-2025-37904

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