CVE-2024-50235 wifi: cfg80211: clear wdev->cqm_config pointer on free
A double-free vulnerability in the Linux kernel Wi-Fi subsystem allows attackers to cause a denial of service or potentially 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-2024-50235?
CVE-2024-50235 is a high-severity use after free vulnerability in Linux kernel, published on 9 Nov 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:
wifi: cfg80211: clear wdev->cqm_config pointer on free
When we free wdev->cqm_config when unregistering, we also need to clear out the pointer since the same wdev/netdev may get re-registered in another network namespace, then destroyed later, running this code again, which results in a double-free.
Weakness: CWE-415
Which versions are affected by CVE-2024-50235?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-50235?
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-2024-50235 being exploited?
There is no known exploitation of CVE-2024-50235 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-53133, BELL-CVE-2024-50235, DEBIAN-CVE-2024-50235, GHSA-88gp-ph45-wpx4, UBUNTU-CVE-2024-50235.