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: KVM: x86: Immediately reset the MMU     context when the SMM flag is cleared Immediately reset the MMU context when the vCPU's SMM flag is cleared     so that the SMM flag in the MMU role is always synchronized with the vCPU's flag. If RSM fails (which     isn't correctly emulated), KVM will bail without calling post_leave_smm() and leave the MMU in a bad     state. The bad MMU role can lead to a NULL pointer dereference when grabbing a shadow page's rmap for a     page fault as the initial lookups for the gfn will happen with the vCPU's SMM flag (=0), whereas the rmap     lookup will use the shadow page's SMM flag, which comes from the MMU (=1). SMM has an entirely different     set of memslots, and so the initial lookup can find a memslot (SMM=0) and then explode on the rmap memslot     lookup (SMM=1). general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1]     PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 8410     Comm: syz-executor382 Not tainted 5.13.0-rc5-syzkaller #0 Hardware name: Google Google Compute     Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__gfn_to_rmap arch/x86/kvm/mmu/mmu.c:935     [inline] RIP: 0010:gfn_to_rmap+0x2b0/0x4d0 arch/x86/kvm/mmu/mmu.c:947 Code: <42> 80 3c 20 00 74 08 4c 89     ff e8 f1 79 a9 00 4c 89 fb 4d 8b 37 44 RSP: 0018:ffffc90000ffef98 EFLAGS: 00010246 RAX: 0000000000000000     RBX: ffff888015b9f414 RCX: ffff888019669c40 RDX: 0000000000000000 RSI: 0000000000000001 RDI:
    0000000000000001 RBP: 0000000000000001 R08: ffffffff811d9cdb R09: ffffed10065a6002 R10: ffffed10065a6002     R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000003 R14: 0000000000000001 R15:
    0000000000000000 FS: 000000000124b300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS:
    0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000028e31000 CR4: 00000000001526e0 DR0:
    0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0     DR7: 0000000000000400 Call Trace: rmap_add arch/x86/kvm/mmu/mmu.c:965 [inline] mmu_set_spte+0x862/0xe60     arch/x86/kvm/mmu/mmu.c:2604 __direct_map arch/x86/kvm/mmu/mmu.c:2862 [inline]     direct_page_fault+0x1f74/0x2b70 arch/x86/kvm/mmu/mmu.c:3769 kvm_mmu_do_page_fault arch/x86/kvm/mmu.h:124     [inline] kvm_mmu_page_fault+0x199/0x1440 arch/x86/kvm/mmu/mmu.c:5065 vmx_handle_exit+0x26/0x160     arch/x86/kvm/vmx/vmx.c:6122 vcpu_enter_guest+0x3bdd/0x9630 arch/x86/kvm/x86.c:9428 vcpu_run+0x416/0xc20     arch/x86/kvm/x86.c:9494 kvm_arch_vcpu_ioctl_run+0x4e8/0xa40 arch/x86/kvm/x86.c:9722     kvm_vcpu_ioctl+0x70f/0xbb0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3460 vfs_ioctl fs/ioctl.c:51 [inline]
    __do_sys_ioctl fs/ioctl.c:1069 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:1055 do_syscall_64+0x3f/0xb0     arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x440ce9 (CVE-2021-47230)

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

Detections

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Linux Distros Unpatched Vulnerability : CVE-2021-47230

medium Nessus Plugin ID 230107

Version 1.9

Version 1.8

Version 1.4

Version 1.1

Version 1.9 Oct 28, 2025, 5:56 PM Detection (updated detection logic) Plugin Feed: 202510281756
Version 1.8 Oct 27, 2025, 11:56 PM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:U/RL:U/RC:C") CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:U/RL:U/RC:C") Detection (updated detection logic) Plugin Feed: 202510272356
Version 1.4 Sep 5, 2025, 4:38 PM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202509051638
Version 1.1 Mar 6, 2025, 7:23 AM New Plugin Feed: 202503060723