Privilege escalation in Linux Kernel
CVE-2016-2853
The aufs module for the Linux kernel 3.x and 4.x does not properly restrict the mount namespace, which allows local users to gain privileges by mounting an aufs filesystem on top of a FUSE filesystem, and then executing a crafted setuid program.
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 (58.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.3% 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.securityfocus.com/bid/96839 (vdb-entry, Broken Link)
- 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.openwall.com/lists/oss-security/2021/10/18/1 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-2853?
- CVE-2016-2853 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-2016-2853?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2016-2853 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.