CVE-2026-93784: Linux kernel · wifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 14:05 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 that validates the IE buffer in cfg80211_wext_siwgenie() before storing it, preventing malformed buffers from causing unsafe memory operations. Users should apply the official Linux kernel updates that include this fix. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor advisory or Linux kernel mailing lists for the exact fixed versions and update accordingly.
Description
A vulnerability in the Linux kernel's wifi cfg80211 subsystem was resolved involving improper validation of Information Elements (IEs) in the cfg80211_wext_siwgenie() function. Malformed IE buffers could be stored without validation, leading to out-of-bounds reads and integer underflows during subsequent processing. This could cause kernel crashes due to fortify panics triggered by unsafe memory operations.
References
- ubuntu.com/security/CVE-2026-93784 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-93784 (opens in a new tab)
- git.kernel.org/stable/c/a2f5286ca4f304d3fd469f01b96b518608912a5c (opens in a new tab)
- git.kernel.org/stable/c/c970879e03b23a27df42caf7ba506485a165fb96 (opens in a new tab)
- git.kernel.org/stable/c/01cc395cecfaa73134d39fb9a401d9605d8bb2c5 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-93784 (opens in a new tab)
- git.kernel.org/stable/c/269498ce6c1e2132b072aa0c8660404926008f03 (opens in a new tab)
- git.kernel.org/stable/c/685082f4be77f4657b498ebbe9f942ef65c492cf (opens in a new tab)
- git.kernel.org/stable/c/8b921a8993469a3482e0c67b5ce5cb6ce93f5f61 (opens in a new tab)
- git.kernel.org/stable/c/d01f1600e8b075aa17adb751ac9881bb6ee40dcc (opens in a new tab)