CVE-2023-52769

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

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Potential Mitigations

References

• https://git.kernel.org/stable/c/6afc57ea315e0f660b1f870a681737bb7b71faef
• https://git.kernel.org/stable/c/afd3425bd69610f318403084fe491e24a1357fb9
• https://git.kernel.org/stable/c/d908ca431e20b0e4bfc5d911d1744910ed779bdb
• https://git.kernel.org/stable/c/6afc57ea315e0f660b1f870a681737bb7b71faef
• https://git.kernel.org/stable/c/afd3425bd69610f318403084fe491e24a1357fb9
• https://git.kernel.org/stable/c/d908ca431e20b0e4bfc5d911d1744910ed779bdb