CVE-2026-23152 wifi: mac80211: correctly decode TTLM with default link map
A buffer over-read in the Linux kernel Wi-Fi driver allows attackers to cause denial of service or potentially execute code via malformed TTLM elements.
- 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-2026-23152?
CVE-2026-23152 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: mac80211: correctly decode TTLM with default link map
TID-To-Link Mapping (TTLM) elements do not contain any link mapping presence indicator if a default mapping is used and parsing needs to be skipped.
Note that access points should not explicitly report an advertised TTLM with a default mapping as that is the implied mapping if the element is not included, this is even the case when switching back to the default mapping. However, mac80211 would incorrectly parse the frame and would also read one byte beyond the end of the element.
Which versions are affected by CVE-2026-23152?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23152?
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-2026-23152 being exploited?
There is no known exploitation of CVE-2026-23152 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-23152, DEBIAN-CVE-2026-23152, GHSA-hqxw-2v34-r7g3, ROOT-OS-DEBIAN-13-CVE-2026-23152, ROOT-OS-UBUNTU-2404-CVE-2026-23152, UBUNTU-CVE-2026-23152.