Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ovl: don't allow datadir only In theory overlayfs could support upper layer directly referring to a data layer, but there's no current use case for this. Originally, when data-only layers were introduced, this wasn't allowed, only introduced by the "datadir+" feature, but without actually handling this case, resulting in an Oops. Fix by disallowing datadir without lowerdir.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.6.23, < 6.6.88 |
References
- https://git.kernel.org/stable/c/0874b629f65320778e7e3e206177770666d9db18Patch
- https://git.kernel.org/stable/c/21d2ffb0e9838a175064c22f3a9de97d1f56f27dPatch
- https://git.kernel.org/stable/c/b9e3579213ba648fa23f780e8d53e99011c62331Patch
- https://git.kernel.org/stable/c/eb3a04a8516ee9b5174379306f94279fc90424c4Patch
FAQ
What is CVE-2025-37863?
CVE-2025-37863 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: ovl: don't allow datadir only In theory overlayfs could support upper layer directly referring to a data layer, but there's no cur...
How severe is CVE-2025-37863?
CVE-2025-37863 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-37863?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.