CVE-2026-43113 wifi: wl1251: validate packet IDs before indexing tx_frames
A missing bounds check in the wl1251 Wi-Fi driver allows a null pointer dereference, potentially causing a system crash.
- 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-2026-43113?
CVE-2026-43113 is a high-severity vulnerability in Linux kernel, published on 6 May 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: wl1251: validate packet IDs before indexing tx_frames
wl1251_tx_packet_cb() uses the firmware completion ID directly to index the fixed 16-entry wl->tx_frames[] array. The ID is a raw u8 from the completion block, and the callback does not currently verify that it fits the array before dereferencing it.
Reject completion IDs that fall outside wl->tx_frames[] and keep the existing NULL check in the same guard. This keeps the fix local to the trust boundary and avoids touching the rest of the completion flow.
Weakness: CWE-476
Which versions are affected by CVE-2026-43113?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43113?
Apply the vendor's patch.
Is CVE-2026-43113 being exploited?
There is no known exploitation of CVE-2026-43113 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43113, DEBIAN-CVE-2026-43113, GHSA-4c54-jj6j-3j34, ROOT-OS-DEBIAN-11-CVE-2026-43113, ROOT-OS-DEBIAN-12-CVE-2026-43113, ROOT-OS-UBUNTU-2204-CVE-2026-43113 and 2 more.