In the Linux kernel, the following vulnerability has been resolved: fs/mbcache: cancel shrink work before destroying the cache mb_cache_destroy() calls shrinker_free() and then frees all cache entries and the cache itself, but it does not cancel the pending c_shrink_work work item first. If mb_cache_entry_create() schedules c_shrink_work via schedule_work() and the work item is still pending or running when mb_cache_destroy() runs, mb_cache_shrink_worker() will access the cache after its memory has been freed, causing a use-after-free. This is only reachable by a privileged user (root or CAP_SYS_ADMIN) who can trigger the last put of a mounted ext2/ext4/ocfs2 filesystem. Cancel the work item with cancel_work_sync() before calling shrinker_free(), ensuring the worker has finished and will not be rescheduled before the cache is torn down.

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3594-1 advisory.

    The SUSE Linux Enterprise 12 SP5 kernel was updated to fix various security issues:

    The following security issues were fixed:

    - CVE-2026-31450: ext4: publish jinode after initialization (bsc#1262618).
    - CVE-2026-31510: Bluetooth: L2CAP: Fix null-ptr-deref on l2cap_sock_ready_cb (bsc#1262603).
    - CVE-2026-31624: HID: core: clamp report_size in s32ton() to avoid undefined shift (bsc#1263657).
    - CVE-2026-43068: ext4: avoid allocate block from corrupted group in ext4_mb_find_by_goal() (bsc#1264255).
    - CVE-2026-43069: Bluetooth: hci_ll: Fix firmware leak on error path (bsc#1264190).
    - CVE-2026-43123: fbcon: check return value of con2fb_acquire_newinfo() (bsc#1264598).
    - CVE-2026-43124: pstore: ram_core: fix incorrect success return when vmap() fails (bsc#1264545).
    - CVE-2026-43156: net: usb: pegasus: enable basic endpoint checking (bsc#1265092).
    - CVE-2026-43168: ocfs2: fix reflink preserve cleanup issue (bsc#1264537).
    - CVE-2026-43180: net: usb: kaweth: remove TX queue manipulation in kaweth_set_rx_mode (bsc#1265093).
    - CVE-2026-43211: PCI: Fix pci_slot_trylock() error handling (bsc#1264387).
    - CVE-2026-43216: net: Drop the lock in skb_may_tx_timestamp() (bsc#1264319).
    - CVE-2026-43226: net/rds: No shortcut out of RDS_CONN_ERROR (bsc#1264544).
    - CVE-2026-43230: net/rds: Clear reconnect pending bit (bsc#1264539).
    - CVE-2026-43244: kcm: fix zero-frag skb in frag_list on partial sendmsg error (bsc#1264321).
    - CVE-2026-43253: iommu/amd: move wait_on_sem() out of spinlock (bsc#1264419).
    - CVE-2026-43266: EFI/CPER: don't go past the ARM processor CPER record buffer (bsc#1264418).
    - CVE-2026-43268: hfsplus: pretend special inodes as regular files (bsc#1265083).
    - CVE-2026-43273: ceph: supply snapshot context in ceph_zero_partial_object() (bsc#1264446).
    - CVE-2026-43281: mailbox: Prevent out-of-bounds access in fw_mbox_index_xlate() (bsc#1264534).
    - CVE-2026-43287: drm: Account property blob allocations to memcg (bsc#1265037).
    - CVE-2026-43308: btrfs: don't BUG() on unexpected delayed ref type in run_one_delayed_ref()     (bsc#1264712).
    - CVE-2026-43309: md raid: fix hang when stopping arrays with metadata through dm-raid (bsc#1264827).
    - CVE-2026-43313: ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()     (bsc#1264821).
    - CVE-2026-43370: drm/amdgpu: Fix use-after-free race in VM acquire (bsc#1264782).
    - CVE-2026-43373: net: ncsi: fix skb leak in error paths (bsc#1265079).
    - CVE-2026-43383: net/tcp-md5: Fix MAC comparison to be constant-time (bsc#1264744).
    - CVE-2026-43425: usb: image: mdc800: kill download URB on timeout (bsc#1265133).
    - CVE-2026-43427: usb: class: cdc-wdm: fix reordering issue in read code path (bsc#1264746).
    - CVE-2026-43445: e1000/e1000e: Fix leak in DMA error cleanup (bsc#1265041).
    - CVE-2026-43449: nvme-pci: Fix slab-out-of-bounds in nvme_dbbuf_set (bsc#1265023).
    - CVE-2026-43450: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (bsc#1264794).
    - CVE-2026-43451: netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path (bsc#1265009).
    - CVE-2026-43452: netfilter: x_tables: guard option walkers against 1-byte tail reads (bsc#1265142).
    - CVE-2026-43466: net/mlx5e: Fix DMA FIFO desync on error CQE SQ recovery (bsc#1264790).
    - CVE-2026-43493: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (bsc#1265627).
    - CVE-2026-43496: net/sched: sch_red: Replace direct dequeue call with peek and qdisc_dequeue_peeked     (bsc#1266000).
    - CVE-2026-45857: scsi: csiostor: Fix dereference of null pointer rn (bsc#1266458).
    - CVE-2026-45858: ext4: subdivide EXT4_EXT_DATA_VALID1 (bsc#1266773).
    - CVE-2026-45871: tpm: st33zp24: Fix missing cleanup on get_burstcount() error (bsc#1266755).
    - CVE-2026-45877: HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients (bsc#1266468).
    - CVE-2026-45899: ext4: drop extent cache when splitting extent fails (bsc#1266883).
    - CVE-2026-45905: xfrm: fix ip_rt_bug race in icmp_route_lookup reverse path (bsc#1266685).
    - CVE-2026-45915: fat: avoid parent link count underflow in rmdir (bsc#1266896).
    - CVE-2026-45917: ipvs: do not keep dest_dst if dev is going down (bsc#1266900).
    - CVE-2026-45920: ext4: fix dirtyclusters double decrement on fs shutdown (bsc#1266893).
    - CVE-2026-45923: net: usb: catc: enable basic endpoint checking (bsc#1266894).
    - CVE-2026-45981: s390/cio: Fix device lifecycle handling in css_alloc_subchannel() (bsc#1267204).
    - CVE-2026-45985: ext4: don't set EXT4_GET_BLOCKS_CONVERT when splitting before submitting I/O     (bsc#1266700).
    - CVE-2026-45994: ibmasm: fix OOB reads in command_file_write due to missing size checks (bsc#1267432).
    - CVE-2026-45997: scsi: sd: fix missing put_disk() when device_add(&disk_dev) fails (bsc#1266740).
    - CVE-2026-46018: ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES (bsc#1266751).
    - CVE-2026-46023: dm mirror: fix integer overflow in create_dirty_log() (bsc#1267449).
    - CVE-2026-46027: net/smc: avoid early lgr access in smc_clc_wait_msg (bsc#1266744).
    - CVE-2026-46033: crypto: authencesn - reject short ahash digests during instance creation (bsc#1266692).
    - CVE-2026-46040: inotify: fix watch count leak when fsnotify_add_inode_mark_locked() fails (bsc#1267472).
    - CVE-2026-46049: ALSA: ctxfi: Add fallback to default RSR for S/PDIF (bsc#1267448).
    - CVE-2026-46051: md/raid5: fix soft lockup in retry_aligned_read() (bsc#1267360).
    - CVE-2026-46056: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers (bsc#1267435).
    - CVE-2026-46064: ibmasm: fix heap over-read in ibmasm_send_i2o_message() (bsc#1267497).
    - CVE-2026-46068: crypto: nx - fix bounce buffer leaks in nx842_crypto_{alloc,free}_ctx (bsc#1267592).
    - CVE-2026-46086: net: bridge: use a stable FDB dst snapshot in RCU readers (bsc#1267524).
    - CVE-2026-46088: ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()     (bsc#1267226).
    - CVE-2026-46102: net: strparser: fix skb_head leak in strp_abort_strp() (bsc#1267502).
    - CVE-2026-46146: ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3() (bsc#1267571).
    - CVE-2026-46149: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()     (bsc#1267648).
    - CVE-2026-46161: md/raid10: fix divide-by-zero in setup_geo() with zero far_copies (bsc#1266838).
    - CVE-2026-46167: usb: usblp: fix uninitialized heap leak via LPGETSTATUS ioctl (bsc#1266832).
    - CVE-2026-46177: ipmi: Add limits to event and receive message requests (bsc#1267725).
    - CVE-2026-46178: RDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq() (bsc#1267493).
    - CVE-2026-46180: wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task     (bsc#1266813).
    - CVE-2026-46184: sound: ua101: fix division by zero at probe (bsc#1266864).
    - CVE-2026-46189: RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path (bsc#1266918).
    - CVE-2026-46191: fbcon: Avoid OOB font access if console rotation fails (bsc#1267690).
    - CVE-2026-46193: xfrm: ah: account for ESN high bits in async callbacks (bsc#1267656).
    - CVE-2026-46220: drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission (bsc#1267704).
    - CVE-2026-46245: drm/amd/display: Fix dc_link NULL handling in HPD init (bsc#1267678).
    - CVE-2026-46252: regulator: core: fix locking in regulator_resolve_supply() error path (bsc#1267676).
    - CVE-2026-46294: dm: fix a buffer overflow in ioctl processing (bsc#1267939).
    - CVE-2026-46307: wifi: ath5k: do not access array OOB (bsc#1267987).
    - CVE-2026-46321: tun: free page on short-frame rejection in tun_xdp_one() (bsc#1268024).
    - CVE-2026-46322: tun: free page on build_skb failure in tun_xdp_one() (bsc#1267994).
    - CVE-2026-52910: bpf: Free reuseport cBPF prog after RCU grace period (bsc#1268659).
    - CVE-2026-52915: netfilter: ip6t_hbh: reject oversized option lists (bsc#1269001).
    - CVE-2026-52927: netfilter: ebtables: fix OOB read in compat_mtw_from_user (bsc#1269027).
    - CVE-2026-52930: ipc/shm: serialize orphan cleanup with shm_nattch updates (bsc#1269003).
    - CVE-2026-52942: netfilter: nf_log: validate MAC header was set before dumping it (bsc#1268967).
    - CVE-2026-52948: i2c: dev: prevent integer overflow in I2C_TIMEOUT ioctl (bsc#1269116).
    - CVE-2026-52956: libceph: Fix potential out-of-bounds access in __ceph_x_decrypt() (bsc#1269172).
    - CVE-2026-52958: libceph: Fix potential out-of-bounds access in osdmap_decode() (bsc#1269174).
    - CVE-2026-52981: neigh: let neigh_xmit take skb ownership (bsc#1269254).
    - CVE-2026-52982: net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit() (bsc#1269258).
    - CVE-2026-52984: net/sched: netem: fix queue limit check to include reordered packets (bsc#1269272).
    - CVE-2026-52986: netfilter: nf_conntrack_sip: don't use simple_strtoul (bsc#1269289).
    - CVE-2026-52995: net/rds: zero per-item info buffer before handing it to visitors (bsc#1269124).
    - CVE-2026-52998: netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check (bsc#1269118).
    - CVE-2026-53002: netfilter: conntrack: remove sprintf usage (bsc#1269112).
    - CVE-2026-53004: sctp: fix OOB write to userspace in sctp_getsockopt_peer_auth_chunks (bsc#1269106).
    - CVE-2026-53006: ipv6: fix possible UAF in icmpv6_rcv() (bsc#1269104).
    - CVE-2026-53016: crypto: ccp - copy IV using skcipher ivsize (bsc#1269090).
    - CVE-2026-53021: scsi: target: core: Fix integer overflow in UNMAP bounds check (bsc#1269151).
    - CVE-2026-53036: bpf, arm64: Reject out-of-range B.cond targets (bsc#1269389).
    - CVE-2026-53039: ocfs2: validate group add input before caching (bsc#1269392).
    - CVE-2026-53060: dm cache metadata: fix memory leak on metadata abort retry (bsc#1269164).
    - CVE-2026-53062: dm cache policy smq: fix missing locks in invalidating cache blocks (bsc#1269658).
    - CVE-2026-53063: dm cache: fix write hang in passthrough mode (bsc#1269659).
    - CVE-2026-53064: dm cache: fix null-deref with concurrent writes in passthrough mode (bsc#1269132).
    - CVE-2026-53093: wifi: brcmfmac: Fix error pointer dereference (bsc#1269414).
    - CVE-2026-53129: fs/mbcache: cancel shrink work before destroying the cache (bsc#1269633).
    - CVE-2026-53131: netfilter: require Ethernet MAC header before using eth_hdr() (bsc#1269773).
    - CVE-2026-53134: netfilter: nft_fib: fix stale stack leak via the OIFNAME register (bsc#1269819).
    - CVE-2026-53146: thunderbolt: Limit XDomain response copy to actual frame size (bsc#1269826).
    - CVE-2026-53147: thunderbolt: Validate XDomain request packet size before type cast (bsc#1269709).
    - CVE-2026-53149: thunderbolt: Bound root directory content to block size (bsc#1269733).
    - CVE-2026-53167: fuse: limit FUSE_NOTIFY_RETRIEVE to uptodate folios (bsc#1269768).
    - CVE-2026-53176: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN (bsc#1269710).
    - CVE-2026-53181: vsock/vmci: fix sk_ack_backlog leak on failed handshake (bsc#1269886).
    - CVE-2026-53186: RDMA/srp: bound SRP_RSP sense copy by the received length (bsc#1269663).
    - CVE-2026-53196: USB: serial: io_ti: fix heap overflow in get_manuf_info() (bsc#1269986).
    - CVE-2026-53208: Bluetooth: L2CAP: reject BR/EDR signaling packets over MTUsig (bsc#1269899).
    - CVE-2026-53213: drm/vc4: fix krealloc() memory leak (bsc#1269283).
    - CVE-2026-53218: netfilter: nft_exthdr: fix register tracking for F_PRESENT flag (bsc#1269273).
    - CVE-2026-53224: sctp: validate embedded INIT chunk and address list lengths in cookie (bsc#1269997).
    - CVE-2026-53225: sctp: fix uninit-value in __sctp_rcv_asconf_lookup() (bsc#1269711).
    - CVE-2026-53227: net: openvswitch: fix possible kfree_skb of ERR_PTR (bsc#1269877).
    - CVE-2026-53236: tcp: restrict SO_ATTACH_FILTER to priv users (bsc#1269994).
    - CVE-2026-53242: ALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams     (bsc#1269236).
    - CVE-2026-53245: net/802/mrp: fix vector attribute parsing in mrp_pdu_parse_vecattr (bsc#1269675).
    - CVE-2026-53246: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing (bsc#1269988).
    - CVE-2026-53249: ipv4: restrict IPOPT_SSRR and IPOPT_LSRR options (bsc#1269992).
    - CVE-2026-53252: adaption to srcu change of hci_dev in hci_sysfs (bsc#1269307).
    - CVE-2026-53254: Bluetooth: RFCOMM: validate skb length in MCC handlers (bsc#1269996).
    - CVE-2026-53255: Bluetooth: MGMT: validate advertising TLV before type checks (bsc#1269378).
    - CVE-2026-53256: Bluetooth: RFCOMM: hold listener socket in rfcomm_connect_ind() (bsc#1269993).
    - CVE-2026-53262: l2tp: remove pppol2tp_session_close() (bsc#1270000).
    - CVE-2026-53267: netfilter: nft_ct: bail out on template ct in get eval (bsc#1269577).
    - CVE-2026-53268: netfilter: conntrack_irc: fix possible out-of-bounds read (bsc#1269257).
    - CVE-2026-53270: ipvs: clear the svc scheduler ptr early on edit (bsc#1269240).
    - CVE-2026-53273: tee: optee: prevent use-after-free when the client exits before the supplicant     (bsc#1269713).
    - CVE-2026-53275: ipv6: mcast: Fix use-after-free when processing MLD queries (bsc#1269810).
    - CVE-2026-53306: tty: hvc_iucv: fix off-by-one in number of supported devices (bsc#1269814).
    - CVE-2026-53325: agp/amd64: Fix broken error propagation in agp_amd64_probe() (bsc#1269726).
    - CVE-2026-53354: arm64: errata: Mitigate TLBI errata on various Arm CPUs (bsc#1270230).
    - CVE-2026-53355: net: rds: clear i_sends on setup unwind (bsc#1270249).
    - CVE-2026-53369: udf: reject descriptors with oversized CRC length (bsc#1271818).
    - CVE-2026-53374: drm/amdgpu: zero-initialize GART table on allocation (bsc#1271827).
    - CVE-2026-53375: drm/amdgpu/vce: Prevent partial address patches (bsc#1271899).
    - CVE-2026-53376: drm/amdkfd: Add upper bound check for num_of_nodes (bsc#1271831).
    - CVE-2026-53388: fuse: re-lock request before replacing page cache folio (bsc#1271825).
    - CVE-2026-53391: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr (bsc#1271904).
    - CVE-2026-53392: NFSv4/flexfiles: reject zero filehandle version count (bsc#1271826).
    - CVE-2026-53397: nfsd: fix posix_acl leak on SETACL decode failure (bsc#1271869).
    - CVE-2026-53399: nfsd: release layout stid on setlease failure (bsc#1271832).
    - CVE-2026-63794: KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path (bsc#1271964).
    - CVE-2026-63806: KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned()     (bsc#1272268).
    - CVE-2026-63826: fbdev: fix use-after-free in store_modes() (bsc#1272183).
    - CVE-2026-63829: net: ip_gre: require CAP_NET_ADMIN in the device netns for changelink (bsc#1272176).
    - CVE-2026-63893: thunderbolt: property: Reject u32 wrap in tb_property_entry_valid() (bsc#1272607).
    - CVE-2026-63899: USB: serial: mxuport: fix memory corruption with small endpoint (bsc#1272494).
    - CVE-2026-63901: USB: serial: digi_acceleport: fix memory corruption with small endpoints (bsc#1272501).
    - CVE-2026-63915: nfc: hci: fix out-of-bounds read in HCP header parsing (bsc#1272897).
    - CVE-2026-63922,CVE-2026-63924: ipv6: exthdrs: recompute network header pointer once (bsc#1272855).
    - CVE-2026-63927: usb: dwc2: Fix use after free in debug code (bsc#1272892).
    - CVE-2026-63928: USB: serial: omninet: fix memory corruption with small endpoint (bsc#1272891).
    - CVE-2026-63958: usb: typec: ucsi: validate connector number in ucsi_connector_change() (bsc#1272467).
    - CVE-2026-64298: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC (bsc#1273550).
    - CVE-2026-64330: usb: typec: tcpm: Validate SVID index in svdm_consume_modes() (bsc#1272681).
    - CVE-2026-64465: usb: xhci: Fix sleep in atomic context in xhci_free_streams() (bsc#1272843).
    - CVE-2026-64564: sctp: don't free the ASCONF's own transport in DEL-IP processing (bsc#1274072).
    - CVE-2026-64600: xfs: resample the data fork mapping after cycling ILOCK (bsc#1271526).

    The following non security issues were fixed:

    - ACPI: processor: Fix previous acpi_processor_errata_piix4() fix (bsc#1264821).
    - dm cache policy smq: check allocation under invalidate lock (git-fixes).
    - dm cache: fix missing return in invalidate_committed's error path (git-fixes).
    - HID: Intel-ish-hid: Ishtp: Fix sensor reads after ACPI S3 suspend (bsc#1266468).
    - KVM: nVMX: use vm_exit_controls_init() to write exit controls for vmcs02 (bsc#1249414).
    - kvm: vmx: Fix entry number check for add_atomic_switch_msr() (git-fixes).
    - mkspec-dtb: Skip missing DTBs.
    - pkspec-dtb: Fix dtb-al rename.
    - sctp: validate embedded address parameter length (git-fixes).
    - tee: fix possible error pointer ctx dereferencing (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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - fs/mbcache: cancel shrink work before destroying the cache mb_cache_destroy() calls shrinker_free() and     then frees all cache entries and the cache itself, but it does not cancel the pending c_shrink_work work     item first. If mb_cache_entry_create() schedules c_shrink_work via schedule_work() and the work item is     still pending or running when mb_cache_destroy() runs, mb_cache_shrink_worker() will access the cache     after its memory has been freed, causing a use-after-free. This is only reachable by a privileged user     (root or CAP_SYS_ADMIN) who can trigger the last put of a mounted ext2/ext4/ocfs2 filesystem. Cancel the     work item with cancel_work_sync() before calling shrinker_free(), ensuring the worker has finished and     will not be rescheduled before the cache is torn down. (CVE-2026-53129)

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

ID	Name	Product	Family	Type	Severity
335089	SUSE SLES12: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2026:3594-1)	Nessus	SuSE Local Security Checks	Local	high
322707	Linux Distros Unpatched Vulnerability : CVE-2026-53129	Nessus	Misc.	Local	high
322107	Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-1894)	Nessus	Amazon Linux Local Security Checks	Local	high
322020	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1866)	Nessus	Amazon Linux Local Security Checks	Local	high

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CVE-2026-53129

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