CVE-2012-0055

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 1.2%, top 34% 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
7.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Exploit-DB (verified), public exploit)
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.8Exploit: Exploit-DB (verified) · public exploitExposed: 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)
EG Risk
66(Track)
EG Risk 66/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
66%
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.

Data Freshness Timeline

(refreshed 10× in last 7d / 34× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-25 14:12 UTCEPSS rescore
  2. 2026-07-23 14:14 UTCEPSS rescore
  3. 2026-07-23 01:06 UTCEG score recompute
  4. 2026-07-23 00:10 UTCEG score recompute
  5. 2026-07-22 21:48 UTCEG score recompute
  6. 2026-07-22 14:04 UTCEPSS rescore
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  17. 2026-07-13 22:25 UTCEPSS rescore
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  1. 2026-07-04 06:27 UTCEPSS rescore
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  4. 2026-06-30 23:19 UTCEPSS rescore
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  6. 2026-06-29 14:02 UTCEPSS rescore
  7. 2026-06-28 14:03 UTCEPSS rescore
  8. 2026-06-28 04:53 UTCEPSS rescore
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  10. 2026-06-27 03:05 UTCEPSS rescore
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  12. 2026-06-25 13:46 UTCEPSS rescore
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  16. 2026-06-23 21:30 UTCEPSS rescore
  17. 2026-06-22 14:22 UTCEPSS rescore
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  19. 2026-06-21 14:53 UTCEPSS rescore
  20. 2026-06-21 01:56 UTCEPSS rescore
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  22. 2026-06-19 19:22 UTCEPSS rescore
  23. 2026-06-19 19:22 UTCEPSS rescore
  24. 2026-06-18 17:49 UTCEPSS rescore
  25. 2026-06-18 17:49 UTCEPSS rescore
  26. 2026-06-17 17:49 UTCEPSS rescore
  27. 2026-06-17 17:49 UTCEPSS rescore
  28. 2026-06-16 17:49 UTCEPSS rescore
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  30. 2026-06-15 17:44 UTCEPSS rescore
  31. 2026-06-14 23:14 UTCEPSS rescore
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  35. 2026-06-11 13:56 UTCEPSS rescore
  36. 2026-06-10 22:14 UTCEPSS rescore
  37. 2026-06-10 13:18 UTCEPSS rescore
  38. 2026-06-08 14:14 UTCEPSS rescore
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  40. 2026-06-07 15:22 UTCEPSS rescore
  41. 2026-06-07 15:22 UTCEPSS rescore
  42. 2026-06-06 13:45 UTCEPSS rescore
  43. 2026-06-06 13:45 UTCEPSS rescore
  44. 2026-06-05 22:44 UTCEPSS rescore
  45. 2026-06-05 22:44 UTCEPSS rescore
  46. 2026-06-05 06:08 UTCEPSS rescore
  47. 2026-06-05 06:08 UTCEPSS rescore
  48. 2026-06-04 13:09 UTCEPSS rescore
  49. 2026-06-02 20:10 UTCEPSS rescore
  50. 2026-06-02 20:10 UTCEPSS rescore
  51. 2026-06-01 13:49 UTCEPSS rescore
  52. 2026-05-31 22:28 UTCEPSS rescore
  53. 2026-05-31 22:28 UTCEPSS rescore
  54. 2026-05-31 00:14 UTCEPSS rescore
  55. 2026-05-31 00:14 UTCEPSS rescore
  56. 2026-05-29 13:41 UTCEPSS rescore
  57. 2026-05-28 13:42 UTCEPSS rescore
  58. 2026-05-28 13:42 UTCEPSS rescore
  59. 2026-05-27 13:38 UTCEPSS rescore
  60. 2026-05-27 13:38 UTCEPSS rescore
  61. 2026-05-27 07:27 UTCEG score recompute
  62. 2026-05-27 07:27 UTCVendor advisory
  63. 2026-05-27 07:27 UTCGHSA enrichment
  64. 2026-05-26 13:41 UTCEPSS rescore
  65. 2026-05-26 13:41 UTCEPSS rescore
  66. 2026-05-26 07:16 UTCEPSS rescore
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  68. 2026-05-26 07:16 UTCEPSS rescore
  69. 2026-05-24 16:43 UTCEPSS rescore

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 ↗

Related CVEs(same vendor + same CWE)

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 1% probability of exploitation in the next 30 days, which ranks it in the top 33.9% of all scored CVEs.
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.

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