EUVD-2026-86171
GHSA-j7q2-v7q5-76jp
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In the Linux kernel, the following vulnerability has been resolved:
wifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()
The KASAN allocation trace shows that a malformed IE buffer is stored via SIOCSIWGENIE (cfg80211_wext_siwgenie()) without any validation. The crash trace shows that a subsequent SIOCSIWESSID triggers a connection attempt which calls cfg80211_sme_get_conn_ies() to process the stored IE buffer, causing:
- An out-of-bounds read in skip_ie() which reads ies[pos+1]
(the length byte) past the end of the 1-byte buffer.
- An integer underflow in the memcpy size argument when offs
returned by ieee80211_ie_split() exceeds ies_len, causing unsigned subtraction to wrap to SIZE_MAX and triggering a fortify panic.
Fix this by validating the IE buffer in cfg80211_wext_siwgenie() before storing it.
[drop unnecessary ie_len check, update commit message]
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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Lifecycle Timeline
2Threat Intelligence Overview
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How this decision was reached
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Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Exploit-DB