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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-98716

KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted Use the MSR permission bitmap of the active VMCB instead of assuming that KVM is always using vmcb02's bitmap when L2 is active, as KVM uses msrpm02 if and only if L1 wants to intercept MSR accesses, i.e. if and only if KVM needs to merge msprm01 with msrpm12. Don't bother tracking the virtual address of the bitmap that's being used, as __va() is cheap on x86, and caching the virtual address would introduce yet another source of potentially stale information.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • b2ac58f90540e39324e7a29a7ad471407ae0bf48 to < 84da7a0e92207444d9cbfe69965e17db29008f27affected
  • b2ac58f90540e39324e7a29a7ad471407ae0bf48 to < 74836ae4785b9754bb36d0b18fcc1dec4e5e98d2affected
  • b2ac58f90540e39324e7a29a7ad471407ae0bf48 to < 318ef696fa3c712e46bb62a1a828c3cd62f390c3affected
  • b2ac58f90540e39324e7a29a7ad471407ae0bf48 to < 55865b3ae03705aa39198783b9cb1f8b96eb44e4affected
  • b2ac58f90540e39324e7a29a7ad471407ae0bf48 to < 9e06bbb9ade7cdf28d4a3b5b14e5812881c8df85affected
  • f54d0bb8487d2f016fbc4f0e38ef9098f8eb8bd4affected
  • 89be8950bab799ddb9cc3777345e3c21bcb32dbaaffected
  • 3.16.57 to < 3.17affected
  • 4.4.168 to < 4.5affected

Linux Linux

Default version status: affected

  • 4.16affected
  • 0 to < 4.16unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.113 to ≤ 6.12.*unaffected
  • 6.18.56 to ≤ 6.18.*unaffected
  • 7.2.10 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References