VDB

DEBIAN-CVE-2021-29657

DEBIAN-CVE-2021-29657 PUBLISHED CVSS 7.400000095367432 HIGH

arch/x86/kvm/svm/nested.c in the Linux kernel before 5.11.12 has a use-after-free in which an AMD KVM guest can bypass access control on host OS MSRs when there are nested guests, aka CID-a58d9166a756. This occurs because of a TOCTOU race condition associated with a VMCB12 double fetch in nested_svm_vmrun.

Risk Scores

CVSS v3.1
7.400000095367432
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products

VendorProductVersions
Debian:13linux0, 0, 0
Debian:12linux0, 0, 0
Debian:14linux0, 0, 0
Debian:11linux0, 0, 0

Timeline

  • Jul 22, 2021 CVE Published
  • Apr 28, 2026 CVE Updated
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