CVE-2026-31779 wifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()
An out-of-bounds read in the iwlwifi driver allows attackers to potentially access sensitive kernel memory via crafted Wi-Fi packets.
- 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-2026-31779?
CVE-2026-31779 is a high-severity memory corruption vulnerability in Linux kernel, published on 1 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: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()
The memcpy function assumes the dynamic array notif->matches is at least as large as the number of bytes to copy. Otherwise, results->matches may contain unwanted data. To guarantee safety, extend the validation in one of the checks to ensure sufficient packet length.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Weakness: CWE-125
Which versions are affected by CVE-2026-31779?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-31779?
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-2026-31779 being exploited?
There is no known exploitation of CVE-2026-31779 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-31779, DEBIAN-CVE-2026-31779, GHSA-4qpj-7mpx-3h2f, ROOT-OS-UBUNTU-2404-CVE-2026-31779, UBUNTU-CVE-2026-31779.