CVE-2024-56161
Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious CPU microcode resulting in loss of confidentiality and integrity of a confidential guest running under AMD…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.53%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious CPU microcode resulting in loss of confidentiality and integrity of a confidential guest running under AMD SEV-SNP.
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
- EPSS
- 0.53% probability · 43th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-347
- Source
- psirt@amd.com
References
- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3019.html
- http://www.openwall.com/lists/oss-security/2025/02/04/1
- http://www.openwall.com/lists/oss-security/2025/03/06/2
- https://lists.debian.org/debian-lts-announce/2025/03/msg00024.html
- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7033.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.