Vulnerability · Published Feb 10, 2026 · Assigned by AMD
CVE-2024-21953
Medium 5.9
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 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)5.9Medium
Exploit odds (30 days)0.2%top 91.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper input validation in IOMMU could allow a malicious hypervisor to reconfigure IOMMU registers resulting in loss of guest data integrity.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | amd64-microcode | no fix listed | DEBIAN-CVE-2024-21953 |
| Debian:13 | amd64-microcode | no fix listed | DEBIAN-CVE-2024-21953 |
| Debian:14 | amd64-microcode | 3.20260923.1 | DEBIAN-CVE-2024-21953 |
| Ubuntu:24.04:LTS | amd64-microcode | no fix listed | UBUNTU-CVE-2024-21953 |
| Ubuntu:25.10 | amd64-microcode | no fix listed | UBUNTU-CVE-2024-21953 |
| Ubuntu:26.04:LTS | amd64-microcode | no fix listed | UBUNTU-CVE-2024-21953 |
| Ubuntu:26.10 | amd64-microcode | no fix listed | UBUNTU-CVE-2024-21953 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AMD | AMD EPYC™ 9004 Series Processors | see references |
| AMD | AMD EPYC™ 8004 Series Processors | see references |
| AMD | AMD EPYC™ Embedded 9004 Series Processors | see references |
Weakness: CWE-1284 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N