CVE-2023-53589: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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 Linux Kernel: from 4.1, before 5.4.244 (fixed in 5.4.244); from 5.5, before 5.10.181 (fixed in 5.10.181); from 5.11, before 5.15.113 (fixed in 5.15.113); from 5.16, before 6.1.30 (fixed in 6.1.30); from 6.2, before 6.3.4 (fixed in 6.3.4); version 6.4 only

Published 2025-10-04. Last modified 2026-08-04.