CVE catalog

CVE-2025-52536

amd64-microcode: CVE-2025-52536

[CVE catalog]

Severity
Medium
Published
Source
[NVD] · [CVE record]
EPSS
0.16% · Oct 25, 2026

Improper Prevention of Lock Bit Modification in SEV firmware could allow a privileged attacker to downgrade firmware potentially resulting in a loss of integrity.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debianamd64-microcodesid3.20251202.1vulnerable
Debianamd64-microcodeforky3.20251202.1vulnerable
Debianamd64-microcodetrixie3.20250311.1vulnerable
Debianamd64-microcodebookworm3.20250311.1~deb12u1vulnerable
Debianamd64-microcodebookworm-security3.20230719.1~deb12u1vulnerable

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debianamd64-microcodesourcesid(unfixed)not yet assignedNot reportedNot reported
Debianamd64-microcodesourceforky(unfixed)not yet assignedNot reportedNot reported
Debianamd64-microcodesourcetrixie(unfixed)not yet assignedNot reportedNot reported
Debianamd64-microcodesourcebookworm(unfixed)not yet assignedNot reportedNot reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

  • [amd64-microcode]Affected
    Details (1)

    • 3.20250311.1~deb12u1 · amd64 · bookworm

      Affected

      dsa · amd64-microcode · debian · bookworm; dsa · amd64-microcode · debian · 12

[Debian 13 (Trixie)]

  • [amd64-microcode]Affected
    Details (1)

    • 3.20250311.1 · amd64 · trixie

      Affected

      dsa · amd64-microcode · debian · 13

Observed:

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]