CVE-2016-1575
HIGHCVSS 7.8/10EPSS 0.92%
Last modified
CVE-2016-1575 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.92% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 4.5.2 |
| Canonical | Ubuntu Core | 15.04 |
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 15.10 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 16.10 |
| Canonical | Ubuntu Touch | 15.04 |
References
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.htmlThird Party Advisory
- http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/Exploit, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/24/7Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/18/1Mailing List, Third Party Advisory
- https://launchpad.net/bugs/1534961Third Party Advisory
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.htmlThird Party Advisory
- http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/Exploit, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/24/7Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/18/1Mailing List, Third Party Advisory
- https://launchpad.net/bugs/1534961Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2016-1575?
CVE-2016-1575 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.
How do I fix CVE-2016-1575?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2016-1575?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST