CVE-2026-93805: Linux kernel · wifi: cfg80211: validate rx/tx MLME callback frame lengths before access
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix has been implemented in the Linux kernel to validate frame lengths properly before processing MLME management frames. Users and administrators should update to a patched Linux kernel version that includes this fix. Since this is a kernel-level vulnerability, applying the official kernel updates from the Linux distribution vendor is the recommended remediation. No additional mitigations are indicated.
Description
A vulnerability in the Linux kernel's wifi cfg80211 subsystem was resolved that involved improper validation of management frame lengths before processing. Specifically, certain management frames shorter than expected for their subtype could cause out-of-bounds reads when accessing fixed fields, such as the reason code in deauthentication frames. The fix added precise length checks per subtype and removed a misleading warning, ensuring malformed frames are dropped silently. This vulnerability affects specific Linux kernel versions listed and has a medium severity rating.
References
- ubuntu.com/security/CVE-2026-93805 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-93805 (opens in a new tab)
- git.kernel.org/stable/c/8f4127a93cf60d561ad39849a9ac763ba0e14db5 (opens in a new tab)
- git.kernel.org/stable/c/d5e4586546974179feca305a94e07fac3e9727fe (opens in a new tab)
- git.kernel.org/stable/c/0ec738a0d361d7eb37188117166d201f9df622d3 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-93805 (opens in a new tab)
- git.kernel.org/stable/c/6bdf4dcff98df634e04ebf99f52027a48d7f78ff (opens in a new tab)
- git.kernel.org/stable/c/6eb4bd50be53f5afbabb3a3b5153276e08fa7a4a (opens in a new tab)
- git.kernel.org/stable/c/ce2a3be6909462f49c34de96be71f0ad5f0d573f (opens in a new tab)