CVE-2025-52536 Security feature bypass in AMD EPYC™ 7003 Series Processors
A privileged attacker can downgrade SEV firmware due to improper lock bit prevention, compromising system integrity on AMD EPYC processors.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-52536?
CVE-2025-52536 is a medium-severity vulnerability in AMD EPYC™ 7003 Series Processors, published on 10 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
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.
Weakness: CWE-1231
Which versions are affected by CVE-2025-52536?
How do I fix CVE-2025-52536?
No fix has been published for CVE-2025-52536 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-52536 being exploited?
There is no known exploitation of CVE-2025-52536 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-52536, GHSA-546x-462h-qqw8, UBUNTU-CVE-2025-52536.