What’s Vulnerable › Vulnerabilities

CVE-2012-0055

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-02-19 · updated 2026-06-16
• Weakness: CWE-862

Description

OverlayFS in the Linux kernel before 3.0.0-16.28, as used in Ubuntu 10.0.4 LTS and 11.10, is missing inode security checks which could allow attackers to bypass security restrictions and perform unauthorized actions.

Affected products

• Canonical Ubuntu Linux: 10.04, 11.10
• Linux kernel: before 3.0.0 — fixed in 3.0.0

How to fix

Upgrade to a fixed version: Linux kernel 3.0.0. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2012/01/17/11
• http://www.ubuntu.com/usn/USN-1363-1
• http://www.ubuntu.com/usn/USN-1364-1
• http://www.ubuntu.com/usn/USN-1384-1
• https://access.redhat.com/security/cve/cve-2012-0055
• https://bugs.launchpad.net/ubuntu/+source/linux/+bug/915941
• https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-0055
• http://www.openwall.com/lists/oss-security/2012/01/17/11
• http://www.ubuntu.com/usn/USN-1363-1
• http://www.ubuntu.com/usn/USN-1364-1
• http://www.ubuntu.com/usn/USN-1384-1
• https://access.redhat.com/security/cve/cve-2012-0055

Get alerted when CVE-2012-0055 or the next vulnerability affects your stack