CVE-2014-8989
The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios,…
- 4.6MediumCVSS base score
- 0.50%Exploitation in 30 daysEPSS · top 57% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a "negative groups" issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c.
Timeline
ID reserved
By mitre
- 11 days later
· 11 days later
Published
- 10 years later
· 10 years 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 · Modified | 2.0 | Medium4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 0.50% · top 57% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.6.
Affected products
n/a
- affected n/a
References
10
- FEDORA-2015-0517 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- USN-2515-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 71154 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- USN-2518-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- MDVSA-2015:058 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- FEDORA-2015-0515 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- http://thread.gmane.org/gmane.linux.man/7385/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-2517-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- [oss-security] 20141120 Re: Linux user namespaces can bypass group-based restrictions - Linux kernel (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- USN-2516-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
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-2014-8816 (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-2014-8989)Record last updated .