Vulnerability · Published Feb 10, 2026 · Assigned by AMD
CVE-2025-52536
Medium 6.7
In plain English
A medium-severity security flaw in AMD EPYC™ 7003 Series Processors from AMD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)6.7Medium
Exploit odds (30 days)0.2%top 94.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper Prevention of Lock Bit Modification in SEV firmware could allow a privileged attacker to downgrade firmware potentially resulting in a loss of integrity.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | amd64-microcode | no fix listed | DEBIAN-CVE-2025-52536 |
| Debian:13 | amd64-microcode | no fix listed | DEBIAN-CVE-2025-52536 |
| Debian:14 | amd64-microcode | 3.20260923.1 | DEBIAN-CVE-2025-52536 |
| Ubuntu:24.04:LTS | amd64-microcode | no fix listed | UBUNTU-CVE-2025-52536 |
| Ubuntu:25.10 | amd64-microcode | no fix listed | UBUNTU-CVE-2025-52536 |
| Ubuntu:26.04:LTS | amd64-microcode | no fix listed | UBUNTU-CVE-2025-52536 |
| Ubuntu:26.10 | amd64-microcode | no fix listed | UBUNTU-CVE-2025-52536 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AMD | AMD EPYC™ 9004 Series Processors | see references |
| AMD | AMD EPYC™ 7003 Series Processors | see references |
| AMD | AMD EPYC™ 9005 Series Processors | see references |
| AMD | AMD EPYC™ 8004 Series Processors | see references |
| AMD | AMD EPYC™ Embedded 7003 Series Processors | see references |
| AMD | AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa") | see references |
| AMD | AMD EPYC™ Embedded 9005 Series Processors | see references |
| AMD | AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Bergamo") | see references |
| AMD | AMD EPYC™ Embedded 8004 Series Processors | see references |
Weakness: CWE-1231 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N