CVE-2021-26344 Memory corruption in AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics
An attacker with BIOS modification capabilities can exploit an out-of-bounds write in AMD PSP firmware to achieve arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-26344?
CVE-2021-26344 is a high-severity memory corruption vulnerability in Amd Epyc 7232p Firmware, published on 13 Aug 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
An out of bounds memory write when processing the AMD PSP1 Configuration Block (APCB) could allow an attacker with access the ability to modify the BIOS image, and the ability to sign the resulting image, to potentially modify the APCB block resulting in arbitrary code execution.
Weakness: CWE-787
Which versions are affected by CVE-2021-26344?
It affects 69 products.
Products include Amd Epyc 7001 Firmware, Amd Epyc 7203 Firmware, Amd Epyc 7203p Firmware, Amd Epyc 7232p Firmware, Amd Epyc 7251 Firmware, Amd Epyc 7252 Firmware and 63 more.
How do I fix CVE-2021-26344?
No fix has been published for CVE-2021-26344 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-26344 being exploited?
There is no known exploitation of CVE-2021-26344 in the wild and no public exploit code.
Other vulnerabilities in Amd Epyc 7232p Firmware
- CVE-2021-26340 A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation
- CVE-2021-26398 Memory corruption in 1st Gen EPYC
- CVE-2021-26331 Code injection in 1st Gen AMD EPYC™
- CVE-2021-26335 Code injection in Athlon™ Series
- CVE-2023-20578 Race condition in AMD EPYC™ 7001 Processors
Sources
Also known as GHSA-9h7f-r33v-rw4r.