Out-of-bounds write in AMD products - CVE-2021-26344
Published: October 2, 2024
Vulnerability identifier: #VU97944
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-26344
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: AMD
Affected software:
1st Gen AMD EPYC Processors
2nd Gen AMD EPYC Processors
3rd Gen AMD EPYC Processors
1st Gen AMD EPYC Processors
2nd Gen AMD EPYC Processors
3rd Gen AMD EPYC Processors
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error when processing the AMD PSP1 Configuration Block (APCB). A local user can trigger an out-of-bounds write, modify the APCB block and execute arbitrary code on the target system.
How to mitigate CVE-2021-26344
Install updates from vendor's website.