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% (67th percentile of EPSS-scored CVEs). 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 verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Public exploit code is available (Exploit-DB, marked verified by Exploit-DB)
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS: 7.8Exploit: Exploit-DB (verified)Exposed services: Not assessed

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
7.8HIGHmedium confidence
EG Risk
66
EG Risk 66/100

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 (value × EchelonGraph’s weight)
Severity78% × 45%
The EG Score, 7.8 of 10.
Exploitation65% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 2 (Weaponized): a constant, not a probability.
Automatability30% × 15%
EchelonGraph's default before algorithm v3.4: CISA had not published Automatable for this CVE.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.2%
EPSS %ILE
68th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

Published

February 19, 2020

Last Modified

November 21, 2024

Advisory Details (4)

Auto-updated Sep 28, 2026
Patch available. Sources: redhat.
generic

oss-security - Re: CVE Request: overlayfs

http://www.openwall.com/lists/oss-security/2012/01/17/11
generic

Making sure you're not a bot!

https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-0055
generic

Bug #915941 “overlayfs does not honor lxc-related permissions” : Bugs : linux package : Ubuntu

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/915941
redhatMentions a patch (unverified)

CVE-2012-0055 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/cve-2012-0055

Patch Availability(3)

Vendor / EcosystemFix (by version range) / 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 8× in last 7d / 18× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 83 of 116 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 17 repeat rows among the latest 100 are merged into the row they repeat. The 33 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 13:39 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  2. 2026-10-10 19:54 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  3. 2026-10-09 20:00 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  4. 2026-10-08 16:34 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  5. 2026-10-07 23:39 UTCEPSS rescoreEPSS 1.2% · 68th percentile
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  9. 2026-10-03 14:20 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  10. 2026-09-29 08:25 UTCEG score recompute
  11. 2026-09-28 13:44 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  12. 2026-09-27 13:39 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  13. 2026-09-26 15:52 UTCEPSS rescoreEPSS 1.2% · 67th percentile
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  20. 2026-09-07 15:56 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  21. 2026-09-05 15:22 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  22. 2026-09-04 13:55 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  23. 2026-08-28 21:34 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  24. 2026-08-27 14:20 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  25. 2026-08-26 14:40 UTCEPSS rescoreEPSS 1.2% · 66th percentile
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  1. 2026-08-23 00:12 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  2. 2026-08-21 23:43 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  3. 2026-08-19 16:59 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  4. 2026-08-18 13:42 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  5. 2026-08-16 02:09 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  6. 2026-08-15 01:25 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  7. 2026-08-09 13:42 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  8. 2026-08-08 16:31 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  9. 2026-08-07 16:21 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  10. 2026-08-06 13:41 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  11. 2026-08-05 19:12 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  12. 2026-08-04 15:04 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  13. 2026-07-30 01:26 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  14. 2026-07-28 15:31 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  15. 2026-07-25 14:12 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  16. 2026-07-23 14:14 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  17. 2026-07-23 01:06 UTCEG score recompute
  18. 2026-07-23 00:10 UTCEG score recompute
  19. 2026-07-22 21:48 UTCEG score recompute
  20. 2026-07-22 14:04 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  21. 2026-07-21 15:21 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  22. 2026-07-20 17:03 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  23. 2026-07-19 02:25 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  24. 2026-07-18 10:00 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  25. 2026-07-16 16:58 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  26. 2026-07-15 16:54 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  27. 2026-07-15 01:56 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  28. 2026-07-13 22:25 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  29. 2026-07-11 08:22 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  30. 2026-07-09 19:05 UTCEPSS rescoreEPSS 1.2% · 65th percentile
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  38. 2026-06-30 23:19 UTCEPSS rescoreEPSS 1.2% · 65th percentile
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  40. 2026-06-28 14:03 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  41. 2026-06-28 04:53 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  42. 2026-06-27 03:05 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  43. 2026-06-25 13:46 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  44. 2026-06-24 14:02 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  45. 2026-06-23 21:30 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  46. 2026-06-22 14:22 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  47. 2026-06-21 14:53 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  48. 2026-06-21 01:56 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  49. 2026-06-19 19:22 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  50. 2026-06-18 17:49 UTCEPSS rescoreEPSS 1.2% · 65th percentile
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  53. 2026-06-15 17:44 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  54. 2026-06-14 23:14 UTCEPSS rescoreEPSS 0.4% · 60th percentile
  55. 2026-06-13 22:57 UTCEPSS rescoreEPSS 0.4% · 60th percentile
  56. 2026-06-12 23:08 UTCEPSS rescoreEPSS 0.4% · 60th percentile
  57. 2026-06-11 13:56 UTCEPSS rescoreEPSS 0.4% · 60th percentile
  58. 2026-06-10 22:14 UTCEPSS rescoreEPSS 0.4% · 60th percentile

Publicly available exploits

(1 reference)

Public exploit code is referenced for this CVE (1 Exploit-DB entry). Defenders should treat patch urgency accordingly.

  • Exploit-DBEDB-36571✓ verified
    Published 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-severity vulnerability; its CVE record was 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 the CVE record for CVE-2012-0055 published?
The CVE record for CVE-2012-0055 was published on February 19, 2020. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2012-0055 actively exploited?
CVE-2012-0055 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model places it in Tier 2 (Weaponized), which is not evidence of exploitation: Exploit-DB marks a public exploit for it as verified. EchelonGraph does not test whether exploit code works. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (68th percentile of EPSS-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?
A fix for CVE-2012-0055 is available: update to the fixed version the vendor names in its advisory.

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