CVE-2012-0055

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 40% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Weaponized
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
65.6%
KEV
Not listed

Published

February 19, 2020

Last Modified

November 21, 2024

References (14)

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-3.0.0-16-generic (3.0.0-16.28) @ oneiric2026-05-27ubuntu
ubuntulinux-image-3.0.0-1207-omap4 (3.0.0-1207.16) @ oneiric2026-05-27ubuntu
ubuntulinux-image-3.0.0-16-generic-pae (3.0.0-16.29~lucid1) @ lucid2026-05-27ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-36571✓ verified
    First seen Jan 17, 2012

    OverlayFS inode Security Checks - 'inode.c' Local Security Bypass

    Open source ↗

Frequently asked(5)

What is CVE-2012-0055?
CVE-2012-0055 is a high vulnerability published on February 19, 2020. 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.
When was CVE-2012-0055 disclosed?
CVE-2012-0055 was first published in the National Vulnerability Database on February 19, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2012-0055 actively exploited?
CVE-2012-0055 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 65.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2012-0055?
CVE-2012-0055 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2012-0055?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-0055, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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