CVE-2026-98164

CVE CVE-2026-98164EUVD EUVD-2026-88753Published 2026-09-29T12:02:12.000Z

What the advisory describes

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]

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 699023e239658e62da6f42f47d31b54788521ec1 <d8636c8f9f95d0fd1e2f6f1cad0d5757aa6f212a; patch: 7.2; patch: 6.1.187; patch: 6.18.49; patch: 0; 699023e239658e62da6f42f47d31b54788521ec1 <429b6f43b4d8c98988fdca99e02dc156134e3d77; 699023e239658e62da6f42f47d31b54788521ec1 <c0a9bd5fca0b5f2dea32b0fc31350e71e8648112; patch: 6.6.156; 699023e239658e62da6f42f47d31b54788521ec1 <09aa68552d2542cc6c23edd1568ac265dc5d886f; patch: 6.12.108; 699023e239658e62da6f42f47d31b54788521ec1 <0f38453cdb2e17566ccb7c0f3dabd5bd21caca26; patch: 7.1.13; 4.2; 699023e239658e62da6f42f47d31b54788521ec1 <ec8fcaf354c1cbb36755d48e9f5a00c9591349e5

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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