CVE-2023-52769 wifi: ath12k: fix htt mlo-offset event locking
A missing RCU lock in the ath12k WiFi driver allows use-after-free, potentially leading to code execution or system crashes.
- 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-2023-52769?
CVE-2023-52769 is a high-severity use after free vulnerability in Linux kernel, published on 21 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: ath12k: fix htt mlo-offset event locking
The ath12k active pdevs are protected by RCU but the htt mlo-offset event handling code calling ath12k_mac_get_ar_by_pdev_id() was not marked as a read-side critical section.
Mark the code in question as an RCU read-side critical section to avoid any potential use-after-free issues.
Compile tested only.
Weakness: CWE-416
Which versions are affected by CVE-2023-52769?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-52769?
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-2023-52769 being exploited?
There is no known exploitation of CVE-2023-52769 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-52769, DEBIAN-CVE-2023-52769, GHSA-ccfj-2gvm-cf3r, UBUNTU-CVE-2023-52769.