Vulnerability · Published Jan 16, 2026 · Assigned by AMD
CVE-2025-29943
Medium 4.6
In plain English
A medium-severity security flaw in AMD EPYC™ 8004 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 13% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
Write what were condition within AMD CPUs may allow an admin-privileged attacker to modify the configuration of the CPU pipeline potentially resulting in the corruption of the stack pointer inside an SEV-SNP guest.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | amd64-microcode | no fix listed | DEBIAN-CVE-2025-29943 |
| Debian:13 | amd64-microcode | no fix listed | DEBIAN-CVE-2025-29943 |
| Debian:14 | amd64-microcode | 3.20251202.1 | DEBIAN-CVE-2025-29943 |
| Ubuntu:22.04:LTS | amd64-microcode | no fix listed | UBUNTU-CVE-2025-29943 |
| Ubuntu:24.04:LTS | amd64-microcode | 3.20251202.1ubuntu0.24.04.1 | UBUNTU-CVE-2025-29943 |
| Ubuntu:25.10 | amd64-microcode | 3.20251202.1ubuntu0.25.10.1 | UBUNTU-CVE-2025-29943 |
| Ubuntu:26.04:LTS | amd64-microcode | 3.20251202.1ubuntu1 | UBUNTU-CVE-2025-29943 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AMD | AMD EPYC™ 9004 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 9005 Series Processors | see references |
Weakness: CWE-123 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N