CVE-2022-49906 ibmvnic: Free rwi on reset success
A memory leak in the ibmvnic driver allows attackers to cause denial of service by exhausting kernel memory through repeated reset operations.
- 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-2022-49906?
CVE-2022-49906 is a medium-severity memory corruption vulnerability in Linux kernel, published on 1 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ibmvnic: Free rwi on reset success
Free the rwi structure in the event that the last rwi in the list processed successfully. The logic in commit 4f408e1fa6e1 ("ibmvnic: retry reset if there are no other resets") introduces an issue that results in a 32 byte memory leak whenever the last rwi in the list gets processed.
Weakness: CWE-401
Which versions are affected by CVE-2022-49906?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49906?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-49906 being exploited?
There is no known exploitation of CVE-2022-49906 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49906, GHSA-4pmq-325h-rx32, UBUNTU-CVE-2022-49906.