Bug 2401572 (CVE-2023-53589)

Summary: CVE-2023-53589 kernel: wifi: iwlwifi: mvm: don't trust firmware n_channels
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-10-04 16:08:07 UTC 
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.
Comment 1 Alexander B 2025-10-06 11:12:27 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100426-CVE-2023-53589-22f7@gregkh/T