CVE-2024-42446 TOCTOU in SmmWhea
A local attacker can exploit a TOCTOU race condition in AMI AptioV BIOS to achieve arbitrary code execution.
- 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-2024-42446?
CVE-2024-42446 is a high-severity vulnerability in AMI AptioV, published on 13 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
APTIOV contains a vulnerability in BIOS where an attacker may cause a Time-of-check Time-of-use (TOCTOU) Race Condition by local means. Successful exploitation of this vulnerability may lead to arbitrary code execution.
Weakness: CWE-367
Which versions are affected by CVE-2024-42446?
It affects 1 product.
Products include Ami Aptio V.
How do I fix CVE-2024-42446?
No fix has been published for CVE-2024-42446 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-42446 being exploited?
There is no known exploitation of CVE-2024-42446 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-pgm8-5pfj-3v9h.