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

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-06 · updated 2026-10-21
Weakness: CWE-129

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.

Affected products

Linux kernel: from 5.8 before 6.18.16; from 6.19 before 6.19.6 — fixed in 6.18.16, 6.19.6

How to fix

Upgrade to a fixed version: Linux kernel 6.18.16, 6.19.6. Check the vendor advisory for mitigations.

References

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

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