CVE-2024-39493 crypto: qat - Fix ADF_DEV_RESET_SYNC memory leak
A memory leak and potential use-after-free in the Linux kernel's QAT crypto driver allows attackers to cause denial of service or execute code.
- 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-2024-39493?
CVE-2024-39493 is a medium-severity memory corruption vulnerability in Linux kernel, published on 10 Jul 2024. 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:
crypto: qat - Fix ADF_DEV_RESET_SYNC memory leak
Using completion_done to determine whether the caller has gone away only works after a complete call. Furthermore it's still possible that the caller has not yet called wait_for_completion, resulting in another potential UAF.
Fix this by making the caller use cancel_work_sync and then freeing the memory safely.
Weakness: CWE-401
Which versions are affected by CVE-2024-39493?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-39493?
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-2024-39493 being exploited?
There is no known exploitation of CVE-2024-39493 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-39493, DEBIAN-CVE-2024-39493, GHSA-vc5j-jhxm-jh4w, UBUNTU-CVE-2024-39493.