CVE-2021-26398 Memory corruption in 1st Gen EPYC
Insufficient input validation in the SYS_KEY_DERIVE system call allows attackers to corrupt AMD Secure Processor memory, potentially leading to arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-26398?
CVE-2021-26398 is a high-severity memory corruption vulnerability in Amd Epyc 7232p Firmware, published on 10 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Insufficient input validation in SYS_KEY_DERIVE system call in a compromised user application or ABL may allow an attacker to corrupt ASP (AMD Secure Processor) OS memory which may lead to potential arbitrary code execution.
Weakness: CWE-787
Which versions are affected by CVE-2021-26398?
It affects 64 products.
Products include Amd Epyc 7001 Firmware, Amd Epyc 7002 Firmware, Amd Epyc 7003 Firmware, Amd Epyc 7232p Firmware, Amd Epyc 7251 Firmware, Amd Epyc 7252 Firmware and 58 more.
How do I fix CVE-2021-26398?
No fix has been published for CVE-2021-26398 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-2021-26398 being exploited?
There is no known exploitation of CVE-2021-26398 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-2021-26331 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
- CVE-2020-12988 Denial of service in 1st/2nd/3rd Gen AMD EPYC™ Processors
Sources
Also known as GHSA-j4gm-gvp6-xh87.