CVE-2026-97927: Linux kernel · ufs: create the root dentry after loading cylinder metadata
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
- 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 25 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 reorders the initialization steps in the Linux kernel UFS code to prevent the NULL pointer dereference. Users should update to a kernel version that includes this fix. Patch status is not explicitly stated in the input data; check vendor advisories for the exact fixed versions and apply updates accordingly.
Description
A vulnerability in the Linux kernel's UFS filesystem code caused a kernel oops during mount failure. The issue occurs because the root dentry is created before the cylinder group metadata is fully loaded, leading to a NULL pointer dereference during error handling. This was fixed by reordering the setup to load cylinder group metadata before creating the root dentry.
References
- ubuntu.com/security/CVE-2026-97927 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97927 (opens in a new tab)
- git.kernel.org/stable/c/8173e051a8acbb4ae6547be0436727944119e0b5 (opens in a new tab)
- git.kernel.org/stable/c/55a4c98abb9694b067c6a031d11501f06b6b523c (opens in a new tab)
- git.kernel.org/stable/c/785e523b6c1931d802cab9f85912f3e6c7028af1 (opens in a new tab)
- git.kernel.org/stable/c/a9804121d55aaa4319c1cac00b99794aa177dd6a (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97927 (opens in a new tab)
- git.kernel.org/stable/c/05360c6eb8388bb5adac3c439ffb1512de39550a (opens in a new tab)
- git.kernel.org/stable/c/5cc48633fb76196b596a449ba1f4f642ad6125ce (opens in a new tab)
- git.kernel.org/stable/c/cd21f1ff74b1c15077fa3b98e80da3b41055aae4 (opens in a new tab)
- git.kernel.org/stable/c/e58db6c2dce6e453dca26c3a4953002425201880 (opens in a new tab)