CVE-2025-37863ovl: don't allow datadir only
- 5.5MediumCVSS base score
- 0.28%Exploitation in 30 daysEPSS · top 79% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 13 months later
· 13 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.28% · top 79% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected cc0918b3582c98f12cfb30bf7496496d14bff3e9 – < 0874b629f65320778e7e3e206177770666d9db18
- affected 24e16e385f2272b1a9df51337a5c32d28a29c7ad – < b9e3579213ba648fa23f780e8d53e99011c62331
- affected 24e16e385f2272b1a9df51337a5c32d28a29c7ad – < 21d2ffb0e9838a175064c22f3a9de97d1f56f27d
- affected 24e16e385f2272b1a9df51337a5c32d28a29c7ad – < eb3a04a8516ee9b5174379306f94279fc90424c4
- affected 6.6.23 – < 6.6.88
- affected 6.7
- unaffected < 6.7
- unaffected 6.6.88 – ≤ 6.6.*
- unaffected 6.12.25 – ≤ 6.12.*
- unaffected 6.14.4 – ≤ 6.14.*
- unaffected 6.15 – ≤ *
References
References4
- https://git.kernel.org/stable/c/0874b629f65320778e7e3e206177770666d9db18 (opens in a new tab)
- https://git.kernel.org/stable/c/b9e3579213ba648fa23f780e8d53e99011c62331 (opens in a new tab)
- https://git.kernel.org/stable/c/21d2ffb0e9838a175064c22f3a9de97d1f56f27d (opens in a new tab)
- https://git.kernel.org/stable/c/eb3a04a8516ee9b5174379306f94279fc90424c4 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-14127 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-37863)Record last updated .