CVE-2026-93199: Linux kernel · i3c: master: Do not treat master device as a duplicate target
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 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 17 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 applied to the Linux kernel to exclude the master device from duplicate target device matching. Users should update to a patched kernel version to remediate this vulnerability.
Description
A vulnerability in the Linux kernel's I3C master device handling was resolved. The function i3c_master_search_i3c_dev_duplicate() incorrectly treated the master device as a duplicate target device, which it is not. This issue was fixed by excluding the master device from duplicate matching to ensure only real duplicate target devices are identified.
References
- ubuntu.com/security/CVE-2026-93199 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-93199 (opens in a new tab)
- git.kernel.org/linus/4dc1b3eeba7991905a5b5b8129ebea51be7d87b7 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-93199 (opens in a new tab)
- git.kernel.org/stable/c/150e71808d3715a0deefbb189c780d03fdbdc735 (opens in a new tab)
- git.kernel.org/stable/c/4dc1b3eeba7991905a5b5b8129ebea51be7d87b7 (opens in a new tab)
- git.kernel.org/stable/c/533faf3d2e67ded0a62b7ba753c0fe993d1dfc26 (opens in a new tab)
- git.kernel.org/stable/c/d0cc00957292e353ad46039034cd8f82fc4f8057 (opens in a new tab)