CVE-2021-26382 Security feature bypass in Athlon™ Series
A root user can bypass firmware signing checks on AMD Audio Co-Processors, potentially causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-26382?
CVE-2021-26382 is a medium-severity vulnerability in AMD Athlon™ Series, published on 14 Jul 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An attacker with root account privileges can load any legitimately signed firmware image into the Audio Co-Processor (ACP,) irrespective of the respective signing key being declared as usable for authenticating an ACP firmware image, potentially resulting in a denial of service.
Which versions are affected by CVE-2021-26382?
It affects 35 products.
Products include Amd Ryzen 3 3200u Firmware, Amd Ryzen 3 3250u Firmware, Amd Ryzen 3 3300u Firmware, Amd Ryzen 3 5125c Firmware, Amd Ryzen 3 5300g Firmware, Amd Ryzen 3 5300ge Firmware and 29 more.
How do I fix CVE-2021-26382?
No fix has been published for CVE-2021-26382 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-26382 being exploited?
There is no known exploitation of CVE-2021-26382 in the wild and no public exploit code.
Other vulnerabilities in AMD Athlon™ Series
Sources
Also known as GHSA-w6fw-9866-83f5.