CVE-2021-26336 Memory corruption in Athlon™ Series
Insufficient bounds checking in AMD SMU firmware allows invalid memory access, causing system hang and denial of service.
- 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-2021-26336?
CVE-2021-26336 is a medium-severity memory corruption vulnerability in Amd Epyc 7232p Firmware, published on 16 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Insufficient bounds checking in System Management Unit (SMU) may cause invalid memory accesses/updates that could result in SMU hang and subsequent failure to service any further requests from other components.
Weakness: CWE-119
Which versions are affected by CVE-2021-26336?
It affects 95 products.
Products include Amd Epyc 7002 Firmware, Amd Epyc 7003 Firmware, Amd Epyc 7232p Firmware, Amd Epyc 7252 Firmware, Amd Epyc 7262 Firmware, Amd Epyc 7272 Firmware and 89 more.
How do I fix CVE-2021-26336?
No fix has been published for CVE-2021-26336 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-2021-26336 being exploited?
There is no known exploitation of CVE-2021-26336 in the wild and no public exploit code.
Other vulnerabilities in Amd Epyc 7232p Firmware
Sources
Also known as GHSA-g84m-4q6r-8c89.