CVE-2009-3547

HIGHNVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2022-05-02. NVD baseline CVSS 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
7.0EG
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: 5%CVSS: 7.0Exploit: Exploit-DB (verified) · public exploitExposed: 0

A fix is available — apply it.

Multiple race conditions in fs/pipe.c in the Linux kernel before 2.6.32-rc6 allow local users to cause a denial of service (NULL pointer dereference and system crash) or gain privileges by attempting to open an anonymous pipe via a /proc/*/fd/ pathname.

CVSS v3
7.0
EG Score
7.0(medium)
EG Risk
62(Track)
EG Risk 62/100SSVC: 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
Severity70% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
91%
KEV
Not listed

Published

November 4, 2009

Last Modified

April 23, 2026

References (58)

Vendor Advisories for CVE-2009-3547(7)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-2.6.31-16-powerpc (2.6.31-16.52) @ karmic2026-05-30ubuntu
redhatkernel-0:2.6.18-92.1.32.el52009-12-15redhat
redhatkernel-0:2.6.18-128.11.1.el52009-11-17redhat
redhatkernel-0:2.6.9-78.0.28.EL2009-11-17redhat
redhatkernel-rt-0:2.6.24.7-137.el5rt2009-11-03redhat
redhatkernel-0:2.4.21-63.EL2009-11-03redhat
redhatkernel-0:2.6.9-89.0.16.EL2009-11-03redhat
redhatkernel-0:2.6.18-164.6.1.el52009-11-03redhat

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

(3 across 2 ecosystems)
Debian:4.0(2)
PackageVulnerable rangeFixed inDependents
linux-2.62.6.18.dfsg.1-12 ... 2.6.18.dfsg.1-26 (37 versions)2.6.18.dfsg.1-26etch1—
linux-2.6.242.6.24-5~etchnhalf.1 ... 2.6.24-6~etchnhalf.9 (13 versions)2.6.24-6~etchnhalf.9etch1—
Debian:5.0(1)
PackageVulnerable rangeFixed inDependents
linux-2.62.6.26-13 ... 2.6.26-19~bpo40+1 (20 versions)2.6.26-19lenny2—

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 / 8× 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 107 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
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  11. 2026-07-23 14:14 UTCEPSS rescore
  12. 2026-07-23 01:00 UTCEG score recompute
  13. 2026-07-23 00:37 UTCEG score recompute
  14. 2026-07-23 00:04 UTCEG score recompute
  15. 2026-07-22 21:43 UTCEG score recompute
  16. 2026-07-22 14:03 UTCEPSS rescore
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  58. 2026-05-31 22:28 UTCEPSS rescore
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  60. 2026-05-31 00:13 UTCEPSS rescore
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  62. 2026-05-30 14:42 UTCEG score recompute
  63. 2026-05-30 14:42 UTCVendor advisory
  64. 2026-05-30 14:42 UTCGHSA enrichment
  65. 2026-05-29 13:40 UTCEPSS rescore
  66. 2026-05-28 13:42 UTCEPSS rescore
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  75. 2026-05-24 16:43 UTCEPSS rescore

Publicly available exploits

(5 references)

Working exploit code is in the public domain (5 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-40812
    First seen Dec 16, 2013

    Linux Kernel 2.6.10 < 2.6.31.5 - 'pipe.c' Local Privilege Escalation

    Open source ↗
  • Exploit-DBEDB-10018✓ verified
    First seen Nov 12, 2009

    Linux Kernel 2.6.32 - 'pipe.c' Local Privilege Escalation (4)

    Open source ↗
  • Exploit-DBEDB-9844✓ verified
    First seen Nov 5, 2009

    Linux Kernel 2.4.1 < 2.4.37 / 2.6.1 < 2.6.32-rc5 - 'pipe.c' Local Privilege Escalation (3)

    Open source ↗
  • Exploit-DBEDB-33321✓ verified
    First seen Nov 3, 2009

    Linux Kernel 2.6.0 < 2.6.31 - 'pipe.c' Local Privilege Escalation (1)

    Open source ↗
  • Exploit-DBEDB-33322✓ verified
    First seen Nov 3, 2009

    Linux Kernel 2.6.x - 'pipe.c' Local Privilege Escalation (2)

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2009-3547?
CVE-2009-3547 is a high vulnerability published on November 4, 2009. Multiple race conditions in fs/pipe.c in the Linux kernel before 2.6.32-rc6 allow local users to cause a denial of service (NULL pointer dereference and system crash) or gain privileges by attempting to open an anonymous pipe via a /proc/*/fd/ pathname.
When was CVE-2009-3547 disclosed?
CVE-2009-3547 was first published in the National Vulnerability Database on November 4, 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-2009-3547 actively exploited?
CVE-2009-3547 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.6% of all scored CVEs.
What is the CVSS score of CVE-2009-3547?
CVE-2009-3547 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2009-3547?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-3547, 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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