CVE-2016-1575 json
The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to…
published 2016-05-02 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-2670
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 1
- Exploit-DB
Summary
The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.
Patch / fix
- linux Debian 14, Debian 13, Debian 12 4.5.1-1
debian advisories DEBIAN-CVE-2016-1575
- linux Ubuntu 14.04 LTS 3.13.0-79.123
- linux-lts-wily Ubuntu 14.04 LTS 4.2.0-30.35~14.04.1
- linux-lts-vivid Ubuntu 14.04 LTS 3.19.0-51.57~14.04.1
- linux-lts-utopic Ubuntu 14.04 LTS 3.16.0-62.82~14.04.1
ubuntu advisories UBUNTU-CVE-2016-1575
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Timeline
- Published
- First public exploit (EDB-41762)
Exploit prediction
0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-41762 Ubuntu 14.04/15.10 - User Namespace Overlayfs Xattr SetGID Privilege Escalation local, 2016-11-22
- halfdog.net http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-269 Improper Privilege Management
- Technology feeds
References
-
git.kernel.org
/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360
patch, vendor-advisory
-
halfdog.net
/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/
exploit, third-party-advisory
-
people.canonical.com
/~ubuntu-security/cve/2016/CVE-2016-1575.html
third-party-advisory
-
launchpad.net
/bugs/1534961
third-party-advisory
-
openwall.com
/lists/oss-security/2016/02/24/7
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2021/10/18/1
mailing-list, third-party-advisory
Sources
- CVE List CVE-2016-1575
- NVD CVE-2016-1575
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.