CVE-2009-3939

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory published 2022-05-02. NVD baseline CVSS 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

The poll_mode_io file for the megaraid_sas driver in the Linux kernel 2.6.31.6 and earlier has world-writable permissions, which allows local users to change the I/O mode of the driver by modifying this file.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

November 16, 2009

Last Modified

April 23, 2026

References (46)

Vendor Advisories for CVE-2009-3939(3)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-2.6.28-17-lpia (2.6.28-17.58) @ jaunty2026-05-30ubuntu
redhatkernel-0:2.6.9-89.0.20.EL2010-02-02redhat
redhatkernel-0:2.6.18-164.11.1.el52010-01-19redhat
redhatkernel-rt-0:2.6.24.7-139.el5rt2009-12-03redhat

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.

Affected Packages

(1 across 1 ecosystem)
Debian:5.0(1)
PackageVulnerable rangeFixed inDependents
linux-2.62.6.26-13 ... 2.6.26-21~bpo40+1 (27 versions)2.6.26-21lenny3—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 2× in last 7d / 9× 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 112 total refreshes for this CVE.

  1. 2026-08-25 13:43 UTCEPSS rescore
  2. 2026-08-19 16:58 UTCEPSS rescore
  3. 2026-08-15 01:24 UTCEPSS rescore
  4. 2026-08-09 13:41 UTCEPSS rescore
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  12. 2026-07-23 14:14 UTCEPSS rescore
  13. 2026-07-23 01:00 UTCEG score recompute
  14. 2026-07-23 00:37 UTCEG score recompute
  15. 2026-07-23 00:04 UTCEG score recompute
  16. 2026-07-22 21:43 UTCEG score recompute
  17. 2026-07-22 14:03 UTCEPSS rescore
  18. 2026-07-21 15:20 UTCEPSS rescore
  19. 2026-07-20 17:03 UTCEPSS rescore
  20. 2026-07-20 17:03 UTCEPSS rescore
  21. 2026-07-18 09:59 UTCEPSS rescore
  22. 2026-07-16 16:58 UTCEPSS rescore
  23. 2026-07-15 16:54 UTCEPSS rescore
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  1. 2026-07-13 22:25 UTCEPSS rescore
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  18. 2026-06-28 04:52 UTCEPSS rescore
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  20. 2026-06-27 03:05 UTCEPSS rescore
  21. 2026-06-25 13:46 UTCEPSS rescore
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  23. 2026-06-24 14:02 UTCEPSS rescore
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  25. 2026-06-23 21:29 UTCEPSS rescore
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  27. 2026-06-22 14:22 UTCEPSS rescore
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  40. 2026-06-15 17:44 UTCEPSS rescore
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  43. 2026-06-13 22:57 UTCEPSS rescore
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  46. 2026-06-10 22:14 UTCEPSS rescore
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  48. 2026-06-08 14:13 UTCEPSS rescore
  49. 2026-06-07 15:22 UTCEPSS rescore
  50. 2026-06-07 15:22 UTCEPSS rescore
  51. 2026-06-06 13:44 UTCEPSS rescore
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  54. 2026-06-05 22:44 UTCEPSS rescore
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  56. 2026-06-05 06:07 UTCEPSS rescore
  57. 2026-06-04 13:09 UTCEPSS rescore
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  59. 2026-06-02 20:10 UTCEPSS rescore
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  61. 2026-06-01 13:49 UTCEPSS rescore
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  63. 2026-05-31 22:28 UTCEPSS rescore
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  65. 2026-05-31 00:13 UTCEPSS rescore
  66. 2026-05-31 00:13 UTCEPSS rescore
  67. 2026-05-30 14:36 UTCEG score recompute
  68. 2026-05-30 14:36 UTCVendor advisory
  69. 2026-05-30 14:36 UTCGHSA enrichment
  70. 2026-05-29 13:40 UTCEPSS rescore
  71. 2026-05-28 13:42 UTCEPSS rescore
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  74. 2026-05-27 13:38 UTCEPSS rescore
  75. 2026-05-27 13:38 UTCEPSS rescore

Frequently asked(5)

What is CVE-2009-3939?
CVE-2009-3939 is a high vulnerability published on November 16, 2009. The pollmodeio file for the megaraid_sas driver in the Linux kernel 2.6.31.6 and earlier has world-writable permissions, which allows local users to change the I/O mode of the driver by modifying this file.
When was CVE-2009-3939 disclosed?
CVE-2009-3939 was first published in the National Vulnerability Database on November 16, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2009-3939 actively exploited?
CVE-2009-3939 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 63.2% of all scored CVEs.
What is the CVSS score of CVE-2009-3939?
CVE-2009-3939 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2009-3939?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-3939, 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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