In the Linux kernel, the following vulnerability has been resolved: dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list() syzbot was able to crash the kernel in rt6_uncached_list_flush_dev() in an interesting way [1] Crash happens in list_del_init()/INIT_LIST_HEAD() while writing list->prev, while the prior write on list->next went well. static inline void INIT_LIST_HEAD(struct list_head *list) { WRITE_ONCE(list->next, list); // This went well WRITE_ONCE(list->prev, list); // Crash, @list has been freed. } Issue here is that rt6_uncached_list_del() did not attempt to lock ul->lock, as list_empty(&rt->dst.rt_uncached) returned true because the WRITE_ONCE(list->next, list) happened on the other CPU. We might use list_del_init_careful() and list_empty_careful(), or make sure rt6_uncached_list_del() always grabs the spinlock whenever rt->dst.rt_uncached_list has been set. A similar fix is neeed for IPv4. [1] BUG: KASAN: slab-use-after-free in INIT_LIST_HEAD include/linux/list.h:46 [inline] BUG: KASAN: slab-use-after-free in list_del_init include/linux/list.h:296 [inline] BUG: KASAN: slab-use-after-free in rt6_uncached_list_flush_dev net/ipv6/route.c:191 [inline] BUG: KASAN: slab-use-after-free in rt6_disable_ip+0x633/0x730 net/ipv6/route.c:5020 Write of size 8 at addr ffff8880294cfa78 by task kworker/u8:14/3450 CPU: 0 UID: 0 PID: 3450 Comm: kworker/u8:14 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: netns cleanup_net Call Trace: <TASK> dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 INIT_LIST_HEAD include/linux/list.h:46 [inline] list_del_init include/linux/list.h:296 [inline] rt6_uncached_list_flush_dev net/ipv6/route.c:191 [inline] rt6_disable_ip+0x633/0x730 net/ipv6/route.c:5020 addrconf_ifdown+0x143/0x18a0 net/ipv6/addrconf.c:3853 addrconf_notify+0x1bc/0x1050 net/ipv6/addrconf.c:-1 notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2268 [inline] call_netdevice_notifiers net/core/dev.c:2282 [inline] netif_close_many+0x29c/0x410 net/core/dev.c:1785 unregister_netdevice_many_notify+0xb50/0x2330 net/core/dev.c:12353 ops_exit_rtnl_list net/core/net_namespace.c:187 [inline] ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:248 cleanup_net+0x4de/0x7b0 net/core/net_namespace.c:696 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 </TASK> Allocated by task 803: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x18d/0x6c0 mm/slub.c:5270 dst_alloc+0x105/0x170 net/core/dst.c:89 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x75/0x460 net/ipv6/route.c:3333 mld_sendpack+0x683/0xe60 net/ipv6/mcast.c:1844 mld_send_cr net/ipv6/mcast.c:2154 [inline] mld_ifc_work+0x83e/0xd60 net/ipv6/mcast.c:2693 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entr ---truncated---

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0984-1 advisory.

    The SUSE Linux Enterprise 15 SP4 kernel was updated to receive various security bugfixes.


    The following security bugs were fixed:

    - CVE-2025-21738: ata: libata-sff: Ensure that we cannot write outside the allocated buffer (bsc#1238917).
    - CVE-2025-40242: gfs2: Fix unlikely race in gdlm_put_lock (bsc#1255075).
    - CVE-2025-71066: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change     (bsc#1256645).
    - 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-2026-23191: 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-2026-23268: 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.

  - dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list() syzbot was able to crash the kernel     in rt6_uncached_list_flush_dev() in an interesting way [1] Crash happens in     list_del_init()/INIT_LIST_HEAD() while writing list->prev, while the prior write on list->next went well.
    static inline void INIT_LIST_HEAD(struct list_head *list) { WRITE_ONCE(list->next, list); // This went     well WRITE_ONCE(list->prev, list); // Crash, @list has been freed. } Issue here is that     rt6_uncached_list_del() did not attempt to lock ul->lock, as list_empty(&rt->dst.rt_uncached) returned     true because the WRITE_ONCE(list->next, list) happened on the other CPU. We might use     list_del_init_careful() and list_empty_careful(), or make sure rt6_uncached_list_del() always grabs the     spinlock whenever rt->dst.rt_uncached_list has been set. A similar fix is neeed for IPv4. [1] BUG: KASAN:
    slab-use-after-free in INIT_LIST_HEAD include/linux/list.h:46 [inline] BUG: KASAN: slab-use-after-free in     list_del_init include/linux/list.h:296 [inline] BUG: KASAN: slab-use-after-free in     rt6_uncached_list_flush_dev net/ipv6/route.c:191 [inline] BUG: KASAN: slab-use-after-free in     rt6_disable_ip+0x633/0x730 net/ipv6/route.c:5020 Write of size 8 at addr ffff8880294cfa78 by task     kworker/u8:14/3450 CPU: 0 UID: 0 PID: 3450 Comm: kworker/u8:14 Tainted: G L syzkaller #0     PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute     Engine, BIOS Google 10/25/2025 Workqueue: netns cleanup_net Call Trace: <TASK> dump_stack_lvl+0xe8/0x150     lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240     mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 INIT_LIST_HEAD     include/linux/list.h:46 [inline] list_del_init include/linux/list.h:296 [inline]     rt6_uncached_list_flush_dev net/ipv6/route.c:191 [inline] rt6_disable_ip+0x633/0x730 net/ipv6/route.c:5020     addrconf_ifdown+0x143/0x18a0 net/ipv6/addrconf.c:3853 addrconf_notify+0x1bc/0x1050 net/ipv6/addrconf.c:-1     notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2268     [inline] call_netdevice_notifiers net/core/dev.c:2282 [inline] netif_close_many+0x29c/0x410     net/core/dev.c:1785 unregister_netdevice_many_notify+0xb50/0x2330 net/core/dev.c:12353 ops_exit_rtnl_list     net/core/net_namespace.c:187 [inline] ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:248     cleanup_net+0x4de/0x7b0 net/core/net_namespace.c:696 process_one_work kernel/workqueue.c:3257 [inline]     process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0     kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50     arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 </TASK> Allocated     by task 803: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80     mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80     mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook     mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x18d/0x6c0     mm/slub.c:5270 dst_alloc+0x105/0x170 net/core/dst.c:89 ip6_dst_alloc net/ipv6/route.c:342 [inline]     icmp6_dst_alloc+0x75/0x460 net/ipv6/route.c:3333 mld_sendpack+0x683/0xe60 net/ipv6/mcast.c:1844     mld_send_cr net/ipv6/mcast.c:2154 [inline] mld_ifc_work+0x83e/0xd60 net/ipv6/mcast.c:2693 process_one_work     kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340     worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463     ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entr
    ---truncated--- (CVE-2026-23004)

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

ID	Name	Product	Family	Severity
303574	SUSE SLES15 : Recommended update for initial livepatch (SUSE-SU-2026:0984-1)	Nessus	SuSE Local Security Checks	high
303406	SUSE SLES15 Security Update : kernel (SUSE-SU-2026:0962-1)	Nessus	SuSE Local Security Checks	critical
296531	Linux Distros Unpatched Vulnerability : CVE-2026-23004	Nessus	Misc.	high

Detections

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CVE-2026-23004

high

Tenable Plugins

high

critical

high