CVE-2024-33659 BiosGuard Buffer Overflow and TOCTOU Vulnerability
A local attacker can exploit a buffer overflow in AMI AptioV BIOS to execute arbitrary code at System Management Mode level.
- 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-2024-33659?
CVE-2024-33659 is a medium-severity memory corruption vulnerability in AMI AptioV, published on 11 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
AMI APTIOV contains a vulnerability in BIOS where an attacker may cause an Improper Input Validation by a local attacker. Successful exploitation of these vulnerabilities may lead to overwriting arbitrary memory and execute arbitrary code at SMM level, also impacting Confidentiality, Integrity, and Availability.
Weakness: CWE-20
Which versions are affected by CVE-2024-33659?
It affects 1 product.
Products include Ami Aptio V.
How do I fix CVE-2024-33659?
No fix has been published for CVE-2024-33659 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-2024-33659 being exploited?
There is no known exploitation of CVE-2024-33659 in the wild and no public exploit code.
Other vulnerabilities in AMI AptioV
- CVE-2022-40250 Stack overflow vulnerability in SMI handler on SmmSmbiosElog.
- CVE-2025-33045 Legacy Serial Redirection SMRAM Vulnerabilities
- CVE-2022-26873 Memory corruption in Aptio
- CVE-2022-40261 SMM memory corruption vulnerability in OverClockSmiHandler SMM driver
- CVE-2022-40262 The arbitrary write vulnerability in S3Resume2Pei leads to arbitrary code execution during PEI phase.
Sources
Also known as GHSA-r8rq-6jrf-gqrw.