CVE-2026-98164(linux / linux_kernel)

LOWCVSS 5.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Check write tracking in all address spaces kvm_gfn_is_write_tracked() checks only the supplied memslot, but page tracking is per-address-space and shadow pages are shared across all address spaces. With SMM, a GFN can therefore be write-tracked in one address space and appear untracked through the other. Check the supplied slot first, then the slot for the other address space. This ensures all callers honor write tracking regardless of the active address space. In particular, it prevents mmu_try_to_unsync_pages() from marking an upper-level shadow page unsync and eventually triggering the BUG in pte_list_remove(). [invert direction of the conditional. - Paolo]

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-670

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • linux_kernel

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Affected systems

Vendors
Products
linux_kernel

1 version affected across 1 product

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-10-30: 110-30
Referenced assets1 URL
By indicator
Full discourse1 post
  • Kim Jinu@uz56764

    A few months ago, I reported several KVM vulnerabilities. More details may be disclosed soon through kvmCTF. 🚨 CVE-2026-98164 (CVSS: 7.1 HIGH) Trail of Bits (@trailofbits) has already publicly demonstrated that this vulnerability can be exploited to achieve a VM escape. https://blog.trailofbits.com/2026/08/26/vms-wont-contain-cyber-capable-agents/ This vulnerability can also independently trigger a guest-to-host kernel panic. Affected services should prioritize patching it. 🚨 CVE-2026-99082 (CVSS: 8.8 HIGH) This vulnerability allowed a full VM escape on older kernel versions used in kvmCTF. However, its impact is relatively minor on most modern kernels, so it is considered a lower priority. Nevertheless, patching is still recommended, as it could potentially be chained with other vulnerabilities, similar to the exploit chain demonstrated by Trail of Bits.

    0202871.2K
    1.2K followersView on X
CPE platform detail6 entries

6 of 6 entries

PartVendorProductVersionTarget SWTarget HW
OSlinuxlinux_kernel---
OSlinuxlinux_kernel7.2--
OSlinuxlinux_kernel7.2--
OSlinuxlinux_kernel7.2--
OSlinuxlinux_kernel7.2--
OSlinuxlinux_kernel7.2--

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