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

  - net: watchdog: fix refcount tracking races Blamed commit converted the untracked dev_hold()/dev_put()     calls in the watchdog code to use the tracked dev_hold_track()/dev_put_track() (which were later     renamed/interfaced to netdev_hold() and netdev_put()). By introducing dev->watchdog_dev_tracker to store     the reference tracking information without adding synchronization between netdev_watchdog_up() and     dev_watchdog(), it enabled the race condition where this pointer could be overwritten or freed     concurrently, leading to the list corruption crash syzbot reported: list_del corruption,     ffff888114a18c00->next is NULL kernel BUG at lib/list_debug.c:52 ! Oops: invalid opcode: 0000 [#1] SMP     KASAN PTI CPU: 1 UID: 0 PID: 91 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name:
    Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: events_unbound     linkwatch_event RIP: 0010:__list_del_entry_valid_or_report.cold+0x22/0x2a lib/list_debug.c:52 Call Trace:
    <TASK> __list_del_entry_valid include/linux/list.h:132 [inline] __list_del_entry include/linux/list.h:246     [inline] list_move_tail include/linux/list.h:341 [inline] ref_tracker_free+0x1a7/0x6c0     lib/ref_tracker.c:329 netdev_tracker_free include/linux/netdevice.h:4491 [inline] netdev_put     include/linux/netdevice.h:4508 [inline] netdev_put include/linux/netdevice.h:4504 [inline]     netdev_watchdog_down net/sched/sch_generic.c:600 [inline] dev_deactivate_many+0x28c/0xfe0     net/sched/sch_generic.c:1363 dev_deactivate+0x109/0x1d0 net/sched/sch_generic.c:1397 linkwatch_do_dev     net/core/link_watch.c:184 [inline] linkwatch_do_dev+0xd3/0x120 net/core/link_watch.c:166
    __linkwatch_run_queue+0x3a5/0x810 net/core/link_watch.c:240 linkwatch_event+0x8f/0xc0     net/core/link_watch.c:314 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314 process_scheduled_works     kernel/workqueue.c:3397 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478 kthread+0x370/0x450     kernel/kthread.c:436 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30     arch/x86/entry/entry_64.S:245 This patch has three coordinated parts: 1) Add dev->watchdog_lock and     dev->watchdog_ref_held to serialize watchdog operations. 2) Remove netdev_watchdog_up() call from     netif_carrier_on(): This ensures netdev_watchdog_up() is only called from process/BH context (via     linkwatch workqueue dev_activate()), allowing us to use spin_lock_bh() for synchronization. 3) Synchronize     watchdog up and watchdog timer: Protect netdev_watchdog_up() with tx_global_lock and watchdog_lock. Only     allocate a new tracker in netdev_watchdog_up() if one is not already present. In dev_watchdog(), ensure we     don't release the tracker if the timer was rescheduled either by dev_watchdog() itself or concurrently by     netdev_watchdog_up(). (CVE-2026-74264)

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

ID	Name	Product	Family	Published	Updated	Severity
341880	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-2071)	Nessus	Amazon Linux Local Security Checks	8/31/2026	9/9/2026	high
335625	Linux Distros Unpatched Vulnerability : CVE-2026-74264	Nessus	Misc.	8/15/2026	9/2/2026	high

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