Privilege escalation in 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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.009 (60.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Linux Kernel
- Canonical Ubuntu Core — versions 15.04
- Canonical Ubuntu Linux — versions 12.04, 14.04, 15.10
- Canonical Ubuntu Touch — versions 15.04
Weakness classification (CWE)
References
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.html (Third Party Advisory)
- launchpad.net/bugs/1534961 (Third Party Advisory)
- www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalat… (Exploit, Third Party Advisory)
- www.openwall.com/lists/oss-security/2016/02/24/7 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/10/18/1 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-1575?
- CVE-2016-1575 is a high-severity vulnerability in 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.