Privilege escalation in Linux Kernel
CVE-2016-2854
The aufs module for the Linux kernel 3.x and 4.x 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 (59.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.7% 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
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/ (Exploit, Third Party Advisory)
- www.openwall.com/lists/oss-security/2016/02/24/9 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- sourceforge.net/p/aufs/mailman/message/34864744/ (mailing-list, Third Party Advisory)
- www.securityfocus.com/bid/96838 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2016-2854?
- CVE-2016-2854 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-2016-2854?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2016-2854 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.