CVE-2021-26338 Privilege escalation in 2nd Gen AMD EPYC™
An attacker with local access can override performance control tables in DRAM, potentially escalating privileges or causing resource exhaustion on AMD EPYC systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-26338?
CVE-2021-26338 is a high-severity vulnerability in Amd Epyc 7232p Firmware, published on 16 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control tables located in DRAM resulting in a potential lack of system resources.
Weakness: CWE-284
Which versions are affected by CVE-2021-26338?
It affects 44 products.
Products include Amd Epyc 7232p Firmware, Amd Epyc 7252 Firmware, Amd Epyc 7262 Firmware, Amd Epyc 7272 Firmware, Amd Epyc 7282 Firmware, Amd Epyc 72f3 Firmware and 38 more.
How do I fix CVE-2021-26338?
No fix has been published for CVE-2021-26338 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-26338 being exploited?
There is no known exploitation of CVE-2021-26338 in the wild and no public exploit code.
Other vulnerabilities in Amd Epyc 7232p Firmware
Sources
Also known as GHSA-42wg-wpqj-99fc.