CVE-2024-36922 wifi: iwlwifi: read txq->read_ptr under lock
A race condition in the iwlwifi driver allows double reclamation of entries, potentially causing a kernel warning and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-36922?
CVE-2024-36922 is a high-severity vulnerability in Linux kernel, published on 30 May 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: iwlwifi: read txq->read_ptr under lock
If we read txq->read_ptr without lock, we can read the same value twice, then obtain the lock, and reclaim from there to two different places, but crucially reclaim the same entry twice, resulting in the WARN_ONCE() a little later. Fix that by reading txq->read_ptr under lock.
Which versions are affected by CVE-2024-36922?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-36922?
Apply the vendor's patch.
Is CVE-2024-36922 being exploited?
There is no known exploitation of CVE-2024-36922 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-68063, BELL-CVE-2024-36922, DEBIAN-CVE-2024-36922, ROOT-OS-DEBIAN-11-CVE-2024-36922, ROOT-OS-DEBIAN-12-CVE-2024-36922, ROOT-OS-UBUNTU-2204-CVE-2024-36922 and 1 more.