CVE-2011-2495

LOWCVSS v2 · 2.12.1—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 2.1 — v2 rates that LOW (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:L/AC:L/Au:N/C:P/I:N/A:N. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 0.5% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
2.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS v2: 2.1Exploit: None knownExposed: 0

A fix is available — apply it.

fs/proc/base.c in the Linux kernel before 2.6.39.4 does not properly restrict access to /proc/#####/io files, which allows local users to obtain sensitive I/O statistics by polling a file, as demonstrated by discovering the length of another user's password.

CVSS v2.0 (legacy)
2.1LOWNVD never assigned a CVSS v3 rating to this CVE
EG Score
2.1(low)
EG Risk
14(Track)
EG Risk 14/100SSVC: 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
Severity21% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

June 13, 2012

Last Modified

April 29, 2026

References (12)

Vendor Advisories for CVE-2011-2495(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(16)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-2.6.32-319-ec2 (2.6.32-319.39) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.38-1209-omap4 (2.6.38-1209.17) @ natty2026-05-29ubuntu
ubuntulinux-image-2.6.38-13-powerpc-smp (2.6.38-13.52) @ natty2026-05-29ubuntu
ubuntulinux-image-2.6.24-29-lpiacompat (2.6.24-29.95) @ hardy2026-05-29ubuntu
ubuntulinux-image-2.6.35-903-omap4 (2.6.35-903.26) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.32-219-dove (2.6.32-219.37) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.32-419-dove (2.6.32-419.37) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.32-35-386 (2.6.32-35.78) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.35-30-virtual (2.6.35-30.61~lucid1) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.38-13-generic (2.6.38-13.52~lucid1) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.31-611-imx51 (2.6.31-611.29) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.35-30-powerpc (2.6.35-30.61) @ maverick2026-05-29ubuntu
redhatkernel-0:2.6.18-238.31.1.el52011-12-13redhat
redhatkernel-rt-0:2.6.33.9-rt31.75.el6rt2011-09-12redhat
redhatkernel-0:2.6.18-274.3.1.el52011-09-06redhat
redhatkernel-0:2.6.32-131.12.1.el62011-08-23redhat

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.

Additional Vendor Advisories

(12)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 9× in last 7d / 36× 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.

Showing the most recent 100 of 109 total refreshes for this CVE.

  1. 2026-07-26 13:43 UTCEG score recompute▲ 2.10
  2. 2026-07-23 14:14 UTCEPSS rescore
  3. 2026-07-23 01:05 UTCEG score recompute
  4. 2026-07-23 00:09 UTCEG score recompute
  5. 2026-07-22 21:47 UTCEG score recompute
  6. 2026-07-22 14:03 UTCEPSS rescore
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  1. 2026-07-05 02:26 UTCEPSS rescore
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  23. 2026-06-19 19:22 UTCEPSS rescore
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  25. 2026-06-18 17:49 UTCEPSS rescore
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  31. 2026-06-15 17:44 UTCEPSS rescore
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  37. 2026-06-11 13:56 UTCEPSS rescore
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  40. 2026-06-08 14:14 UTCEPSS rescore
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  44. 2026-06-06 13:45 UTCEPSS rescore
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  46. 2026-06-05 22:44 UTCEPSS rescore
  47. 2026-06-05 06:08 UTCEPSS rescore
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  49. 2026-06-04 13:09 UTCEPSS rescore
  50. 2026-06-04 13:09 UTCEPSS rescore
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  53. 2026-06-01 13:49 UTCEPSS rescore
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  59. 2026-05-29 13:41 UTCEPSS rescore
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  61. 2026-05-29 04:20 UTCEG score recompute
  62. 2026-05-29 04:20 UTCVendor advisory
  63. 2026-05-29 04:20 UTCGHSA enrichment
  64. 2026-05-28 13:42 UTCEPSS rescore
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  74. 2026-05-22 21:15 UTCEPSS rescore
  75. 2026-05-22 21:15 UTCEPSS rescore

Frequently asked(4)

What is CVE-2011-2495?
CVE-2011-2495 is a low vulnerability published on June 13, 2012. fs/proc/base.c in the Linux kernel before 2.6.39.4 does not properly restrict access to /proc/#####/io files, which allows local users to obtain sensitive I/O statistics by polling a file, as demonstrated by discovering the length of another user's password.
When was CVE-2011-2495 disclosed?
CVE-2011-2495 was first published in the National Vulnerability Database on June 13, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-2495 actively exploited?
CVE-2011-2495 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.1% of all scored CVEs.
How do I remediate CVE-2011-2495?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-2495, 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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