CVE-2026-23135 wifi: ath12k: fix dma_free_coherent() pointer
A pointer misuse in the ath12k WiFi driver causes memory corruption, potentially leading to system crashes or arbitrary code execution.
- 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-2026-23135?
CVE-2026-23135 is a medium-severity memory corruption vulnerability in Linux kernel, published on 14 Feb 2026. 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 dma_free_coherent() pointer
dma_alloc_coherent() allocates a DMA mapped buffer and stores the addresses in XXX_unaligned fields. Those should be reused when freeing the buffer rather than the aligned addresses.
Which versions are affected by CVE-2026-23135?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23135?
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-2026-23135 being exploited?
There is no known exploitation of CVE-2026-23135 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-77688, BELL-CVE-2026-23135, DEBIAN-CVE-2026-23135, GHSA-88jw-j953-862r, ROOT-OS-UBUNTU-2404-CVE-2026-23135, UBUNTU-CVE-2026-23135.