CVE-2023-20519 Use after free in 3rd Gen AMD EPYC™ Processors
A malicious hypervisor can exploit a use-after-free flaw in AMD EPYC processors to masquerade as a migration agent, compromising guest integrity.
- 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-2023-20519?
CVE-2023-20519 is a low-severity use after free vulnerability in 3rd Gen AMD EPYC™ Processors, published on 14 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A Use-After-Free vulnerability in the management of an SNP guest context page may allow a malicious hypervisor to masquerade as the guest's migration agent resulting in a potential loss of guest integrity.
Weakness: CWE-416
Which versions are affected by CVE-2023-20519?
It affects 2 products.
Products include Amd Genoapi Firmware, Amd Milanpi Firmware.
How do I fix CVE-2023-20519?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2023-20519 being exploited?
There is no known exploitation of CVE-2023-20519 in the wild and no public exploit code.
Sources
Also known as GHSA-3pww-pqg2-m2hm.