CVE-2026-93784 Affecting linux-6.12 package, versions <6.12.111-1~deb12u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-LINUX612-20506809
- published5 Oct 2026
- disclosed24 Sept 2026
Introduced: 24 Sep 2026
NewCVE-2026-93784 (opens in a new tab)How to fix?
Upgrade Debian:12 linux-6.12 to version 6.12.111-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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]
References
- https://security-tracker.debian.org/tracker/CVE-2026-93784
- https://git.kernel.org/stable/c/01cc395cecfaa73134d39fb9a401d9605d8bb2c5
- https://git.kernel.org/stable/c/a2f5286ca4f304d3fd469f01b96b518608912a5c
- https://git.kernel.org/stable/c/c970879e03b23a27df42caf7ba506485a165fb96
- https://git.kernel.org/stable/c/269498ce6c1e2132b072aa0c8660404926008f03
- https://git.kernel.org/stable/c/685082f4be77f4657b498ebbe9f942ef65c492cf
- https://git.kernel.org/stable/c/8b921a8993469a3482e0c67b5ce5cb6ce93f5f61
- https://git.kernel.org/stable/c/d01f1600e8b075aa17adb751ac9881bb6ee40dcc