CVE-2026-93206: Linux kernel · PCI/proc: Use file_ns_capable() when checking config space read access
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 12:55 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 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 is available that changes the capability check to use file_ns_capable(), verifying CAP_SYS_ADMIN against the credentials at file open time. Users should apply the official Linux kernel patches that address this vulnerability to ensure consistent and secure access control for PCI config space reads.
Description
A vulnerability in the Linux kernel's PCI/proc interface allowed unprivileged processes to read the entire PCI configuration space if a privileged process opened the config space file and passed the file descriptor to them. This was due to the proc interface checking capabilities of the reading task rather than the opening process, unlike the sysfs interface. The issue has been resolved by changing the capability check to use the credentials of the process that opened the file, aligning procfs behavior with sysfs.
References
- ubuntu.com/security/CVE-2026-93206 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-93206 (opens in a new tab)
- git.kernel.org/stable/c/53407535d49ec034e476121020b5c878f0d92e18 (opens in a new tab)
- git.kernel.org/stable/c/5c7ab4ca66f0880cffc3735555ea719dd5253726 (opens in a new tab)
- git.kernel.org/stable/c/e7730acd6a01c5931a3afb83639810ff2fb9cc92 (opens in a new tab)
- git.kernel.org/stable/c/8a3a54aa3e65ed76f8560a387243a7738ae0cb1c (opens in a new tab)
- git.kernel.org/stable/c/f82f53e75eff382fc8f56b73279b54f7cf5a5c65 (opens in a new tab)
- git.kernel.org/stable/c/6351e94076329dab517ea94c115e15c4d8459381 (opens in a new tab)
- git.kernel.org/stable/c/77272b7fd0e472086fd626a1fcd11da625822cc2 (opens in a new tab)
- git.kernel.org/stable/c/c2d4174f492458ecdcdef309243624999612d526 (opens in a new tab)