CVE-2023-53589: wifi: iwlwifi: mvm: don't trust firmware n_channels

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-04 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mvm: don't trust firmware n_channels If the firmware sends us a corrupted MCC response with n_channels much larger than the command response can be, we might copy far too much (uninitialized) memory and even crash if the n_channels is large enough to make it run out of the one page allocated for the FW response. Fix that by checking the lengths. Doing a < comparison would be sufficient, but the firmware should be doing it correctly, so check more strictly.

Affected products

Linux kernel: from 4.1 before 5.4.244; from 5.5 before 5.10.181; from 5.11 before 5.15.113; from 5.16 before 6.1.30; from 6.2 before 6.3.4; 6.4-rc1, 6.4-rc2 — fixed in 5.10.181, 5.15.113, 5.4.244, 6.1.30, 6.3.4

How to fix

Upgrade to a fixed version: Linux kernel 5.10.181, 5.15.113, 5.4.244, 6.1.30. Check the vendor advisory for mitigations.

References

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