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

  - KVM: x86/mmu: WARN and clear role.invalid when creating a child shadow page Explicitly clear role.invalid     when deriving a child shadow page's role from its parent to harden against bugs elsewhere in KVM, as     violating KVM's invariant that invalid pages are NOT on the list of active MMU pages leads to use-after-     free due to __kvm_mmu_prepare_zap_page() using list_add() instead of list_move() when processing an     invalid shadow page, i.e. makes a bad situation far worse. Yell loudly if the parent is invalid, as it     means KVM has missed a validity check, i.e. KVM is attempting to map memory using an invalid/obsolete     root, but continue on as the child is otherwise still a valid shadow page.
    ================================================================== BUG: KASAN: slab-use-after-free in
    __kvm_mmu_get_shadow_page+0x1817/0x1860 [kvm] Write of size 8 at addr ff11000153dd1368 by task repro/853     CPU: 1 UID: 1000 PID: 853 Comm: repro Not tainted 7.2.0-rc2-3aec122bdcaf-next-vm #5 PREEMPT Hardware name:
    QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 Call Trace: <TASK> dump_stack_lvl+0x4b/0x70     print_report+0x153/0x49c kasan_report+0xbc/0xf0 __kvm_mmu_get_shadow_page+0x1817/0x1860 [kvm]     mmu_alloc_root+0x141/0x320 [kvm] kvm_mmu_load+0x612/0x20f0 [kvm] kvm_arch_vcpu_ioctl_run+0x3dd5/0x6150     [kvm] kvm_vcpu_ioctl+0x5e4/0x10d0 [kvm] __x64_sys_ioctl+0x131/0x1b0 do_syscall_64+0x67/0x5f0     entry_SYSCALL_64_after_hwframe+0x4b/0x53 </TASK> Allocated by task 853: kasan_save_stack+0x20/0x40     kasan_save_track+0x14/0x30 __kasan_slab_alloc+0x5f/0x70 kmem_cache_alloc_noprof+0xfe/0x2e0
    __kvm_mmu_topup_memory_cache+0x135/0x530 [kvm] paging64_page_fault+0x318/0x1e30 [kvm]     kvm_mmu_do_page_fault+0x21d/0x630 [kvm] kvm_mmu_page_fault+0x18c/0x17b0 [kvm]     kvm_arch_vcpu_ioctl_run+0x1f35/0x6150 [kvm] kvm_vcpu_ioctl+0x5e4/0x10d0 [kvm] __x64_sys_ioctl+0x131/0x1b0     do_syscall_64+0x67/0x5f0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 Freed by task 853:
    kasan_save_stack+0x20/0x40 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x60
    __kasan_slab_free+0x43/0x70 kmem_cache_free+0xe2/0x400 kvm_mmu_commit_zap_page.part.0+0x1e2/0x310 [kvm]     kvm_mmu_free_roots+0x283/0x560 [kvm] kvm_arch_vcpu_ioctl_run+0x33c8/0x6150 [kvm]     kvm_vcpu_ioctl+0x5e4/0x10d0 [kvm] __x64_sys_ioctl+0x131/0x1b0 do_syscall_64+0x67/0x5f0     entry_SYSCALL_64_after_hwframe+0x4b/0x53 (CVE-2026-80726)

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

Detections

Analytics

Linux Distros Unpatched Vulnerability : CVE-2026-80726

critical Nessus Plugin ID 342739

Version 1.5

Version 1.4

Version 1.3

Version 1.3

Version 1.2

Version 1.1

Version 1.5 Sep 10, 2026, 3:20 PM CVSS metrics ("CVSSv2 score" set to 7.2) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C") CVSSv2 severity (based on CVE-2026-80726, severity increased from "Medium" to "High") Plugin Feed: 202609101520
Version 1.4 Sep 9, 2026, 2:39 AM CVSS metrics ("CVSSv2 score" set to 6.6) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:L/Au:N/C:N/I:C/A:C") CVSSv2 severity (based on CVE-2026-80726, severity decreased from "High" to "Medium") Detection (updated detection logic) Plugin metadata Plugin Feed: 202609090239
Version 1.3 Sep 7, 2026, 9:43 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202609070943
Version 1.3 Sep 7, 2026, 2:57 PM CVSS metrics ("CVSSv2 score" set to 7.2) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C") CVSSv2 severity (based on CVE-2026-80726, severity increased from "Medium" to "High") Plugin Feed: 202609071457
Version 1.2 Sep 5, 2026, 1:14 PM CVSS metrics ("CVSSv2 score" set to 6.2) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:C") CVSS metrics ("CVSSv3 score" set to 9.3) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H") CVSSv2 severity (based on CVE-2026-80726, severity decreased from "High" to "Medium") Detection (updated detection logic) Plugin metadata Plugin Feed: 202609051314
Version 1.1 Sep 4, 2026, 7:34 AM New Plugin Feed: 202609040734