CVE-2021-26347 Integer overflow in Ryzen 5000 Series
An integer overflow in the AMD Secure Processor bootloader allows attackers to cause a denial of service via SPI flash manipulation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-26347?
CVE-2021-26347 is a medium-severity vulnerability in Amd Epyc 7232p Firmware, published on 11 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Failure to validate the integer operand in ASP (AMD Secure Processor) bootloader may allow an attacker to introduce an integer overflow in the L2 directory table in SPI flash resulting in a potential denial of service.
Weakness: CWE-1284
Which versions are affected by CVE-2021-26347?
It affects 49 products.
Products include Amd Epyc 7002 Firmware, Amd Epyc 7232p Firmware, Amd Epyc 7252 Firmware, Amd Epyc 7262 Firmware, Amd Epyc 7272 Firmware, Amd Epyc 7282 Firmware and 43 more.
How do I fix CVE-2021-26347?
Apply the vendor's patch.
Is CVE-2021-26347 being exploited?
There is no known exploitation of CVE-2021-26347 in the wild and no public exploit code.
Other vulnerabilities in Amd Epyc 7232p Firmware
Sources
Also known as GHSA-3mg2-q757-f3m2.