CVE-2026-93788: Linux kernel · wifi: iwlwifi: acpi: validate WGDS table revision index
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 17:16 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 the WGDS table revision index before performing bit shift operations, preventing undefined shifts. Users should update to a patched kernel version that includes this fix. Since this is a kernel-level issue, applying official kernel updates from the Linux distribution or vendor is the recommended remediation.
Description
A vulnerability in the Linux kernel's iwlwifi driver related to ACPI WGDS table revision index validation has been resolved. The issue involved improper bounds checking of the table revision index, which could lead to undefined behavior when the firmware reports an invalid revision value. This vulnerability affects specific Linux kernel versions listed and has been assigned a medium severity rating.
References
- ubuntu.com/security/CVE-2026-93788 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-93788 (opens in a new tab)
- git.kernel.org/stable/c/954e821f42aaca56073ca830c5fd4bcf1a89048c (opens in a new tab)
- git.kernel.org/stable/c/2fc98ab6fe8acabd13eb09dc17426a33cf9f27f7 (opens in a new tab)
- git.kernel.org/stable/c/346a558491241cbe8fef82b3d8f62d1a6b6bf61f (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-93788 (opens in a new tab)
- git.kernel.org/stable/c/4f2ec7a0b3ff148cb13e14cb26ac43523df8b9f5 (opens in a new tab)
- git.kernel.org/stable/c/9096509e63ddd349eb075ec447d1a714e87e17a4 (opens in a new tab)