Privilege escalation in Linux Linux_kernel
CVE-2016-1575
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.
Vulnerability class: Privilege Escalation
EPSS: 0.005 (67.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux Linux_kernel
- Canonical Ubuntu_core — versions 15.04
- Canonical Ubuntu_linux — versions 12.04, 14.04, 15.10
- Canonical Ubuntu_touch — versions 15.04
- N/a — versions n/a
Weakness classification (CWE)
References
- security@ubuntu.com (Patch, x_refsource_MISC, Vendor Advisory)
- security@ubuntu.com (x_refsource_CONFIRM, Third Party Advisory)
- security@ubuntu.com (x_refsource_CONFIRM, Third Party Advisory)
- security@ubuntu.com (Exploit, Third Party Advisory, x_refsource_MISC)
- [oss-security] 20160224 User Namespaces Overlayfs Xattr Setgid Privilege Escalation: Overlayfs (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- [oss-security] 20211018 Re: CVE-2021-3847: OverlayFS - Potential Privilege Escalation using overlays copy_up (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-1575?
- CVE-2016-1575 is a high-severity vulnerability in Linux Linux_kernel, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2016-05-02.
- How severe is CVE-2016-1575?
- High severity. CVSS v3 base score is 7.8 out of 10.