CVE-2026-93784
CVE CVE-2026-93784EUVD EUVD-2026-86171Published 2026-09-24T16:02:18.000ZLast changed 2026-09-25T12:42:49.000Z
What the advisory describes
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]
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux f21293549f60f88c74fcb9944737f11048896dc4 <01cc395cecfaa73134d39fb9a401d9605d8bb2c5; 2.6.32; patch: 7.2; patch: 6.18.53; f21293549f60f88c74fcb9944737f11048896dc4 <a2f5286ca4f304d3fd469f01b96b518608912a5c; patch: 6.12.111; f21293549f60f88c74fcb9944737f11048896dc4 <c970879e03b23a27df42caf7ba506485a165fb96; patch: 0
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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