CVE-2026-23133 wifi: ath10k: fix dma_free_coherent() pointer
A use-after-free vulnerability in the ath10k Wi-Fi driver allows attackers to potentially execute code or escalate privileges via improper DMA buffer handling.
- 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-2026-23133?
CVE-2026-23133 is a medium-severity use after free 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: ath10k: 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.
Weakness: CWE-416
Which versions are affected by CVE-2026-23133?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23133?
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-2026-23133 being exploited?
There is no known exploitation of CVE-2026-23133 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-77754, BELL-CVE-2026-23133, DEBIAN-CVE-2026-23133, GHSA-f6qx-9px5-6w93, ROOT-OS-UBUNTU-2204-CVE-2026-23133, ROOT-OS-UBUNTU-2404-CVE-2026-23133 and 1 more.