Bug 2367587 (CVE-2025-37973)

Summary: CVE-2025-37973 kernel: wifi: cfg80211: fix out-of-bounds access during multi-link element defragmentation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-20 17:02:12 UTC 
In the Linux kernel, the following vulnerability has been resolved:

wifi: cfg80211: fix out-of-bounds access during multi-link element defragmentation

Currently during the multi-link element defragmentation process, the
multi-link element length added to the total IEs length when calculating
the length of remaining IEs after the multi-link element in
cfg80211_defrag_mle(). This could lead to out-of-bounds access if the
multi-link element or its corresponding fragment elements are the last
elements in the IEs buffer.

To address this issue, correctly calculate the remaining IEs length by
deducting the multi-link element end offset from total IEs end offset.
Comment 1 Jon Moroney 2025-05-21 02:47:07 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025052046-CVE-2025-37973-3687@gregkh/T