CVE-2009-2692

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-02. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 15%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

The Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does not initialize all function pointers for socket operations in proto_ops structures, which allows local users to trigger a NULL pointer dereference and gain privileges by using mmap to map page zero, placing arbitrary code on this page, and then invoking an unavailable operation, as demonstrated by the sendpage operation (sock_sendpage function) on a PF_PPPOX socket.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
96.3%
KEV
Not listed

Published

August 14, 2009

Last Modified

April 23, 2026

Advisory Details (5)

Auto-updated May 30, 2026
No patch confirmed yet.
generic

About Secunia Research | Flexera

http://secunia.com/advisories/36289
generic

About Secunia Research | Flexera

http://secunia.com/advisories/36278
generic
http://rhn.redhat.com/errata/RHSA-2009-1223.html
generic
http://rhn.redhat.com/errata/RHSA-2009-1222.html
generic

cr0 blog: Linux NULL pointer dereference due to incorrect proto_ops initializations (CVE-2009-2692)

http://blog.cr0.org/2009/08/linux-null-pointer-dereference-due-to.html

Vendor Advisories for CVE-2009-2692(6)

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

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-2.6.28-15-imx51 (2.6.28-15.49) @ jaunty2026-05-30ubuntu
redhatkernel-0:2.6.9-78.0.27.EL2009-09-30redhat
redhatkernel-0:2.6.18-92.1.28.el52009-09-22redhat
redhatkernel-rt-0:2.6.24.7-132.el5rt2009-09-01redhat
redhatkernel-0:2.4.21-60.EL2009-08-27redhat
redhatkernel-0:2.6.18-128.7.1.el52009-08-24redhat
redhatkernel-0:2.6.9-89.0.9.EL2009-08-24redhat

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(2)

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 6× in last 7d / 32× 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. 2026-07-22 14:03 UTCEPSS rescore
  2. 2026-07-21 15:20 UTCEPSS rescore
  3. 2026-07-20 17:03 UTCEPSS rescore
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  1. 2026-06-27 03:05 UTCEPSS rescore
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  23. 2026-06-13 22:57 UTCEPSS rescore
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  41. 2026-06-01 13:49 UTCEPSS rescore
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  43. 2026-05-31 22:28 UTCEPSS rescore
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  45. 2026-05-31 00:13 UTCEPSS rescore
  46. 2026-05-31 00:13 UTCEPSS rescore
  47. 2026-05-30 15:47 UTCEG score recompute
  48. 2026-05-30 15:47 UTCVendor advisory
  49. 2026-05-30 15:47 UTCGHSA enrichment
  50. 2026-05-29 13:40 UTCEPSS rescore
  51. 2026-05-28 13:42 UTCEPSS rescore
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  56. 2026-05-26 13:41 UTCEPSS rescore
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  58. 2026-05-26 07:16 UTCEPSS rescore
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  60. 2026-05-24 16:43 UTCEPSS rescore
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  63. 2026-05-20 22:37 UTCEPSS rescore
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  65. 2026-05-20 11:21 UTCEPSS rescore
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  67. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(9 references)

Working exploit code is in the public domain (1 Metasploit module) (8 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-19933✓ verified
    First seen Jul 19, 2012

    Linux Kernel 2.4.4 < 2.4.37.4 / 2.6.0 < 2.6.30.4 - 'Sendpage' Local Privilege Escalation (Metasploit)

    Open source ↗
  • Exploit-DBEDB-9641✓ verified
    First seen Sep 11, 2009

    Linux Kernel 2.4/2.6 - 'sock_sendpage()' Local Privilege Escalation (3)

    Open source ↗
  • Exploit-DBEDB-9598✓ verified
    First seen Sep 9, 2009

    Linux Kernel 2.4/2.6 (Fedora 11) - 'sock_sendpage()' Local Privilege Escalation (2)

    Open source ↗
  • Exploit-DBEDB-9545✓ verified
    First seen Aug 31, 2009

    Linux Kernel 2.4.x/2.6.x (CentOS 4.8/5.3 / RHEL 4.8/5.3 / SuSE 10 SP2/11 / Ubuntu 8.10) (PPC) - 'sock_sendpage()' Local Privilege Escalation

    Open source ↗
  • Exploit-DBEDB-9479✓ verified
    First seen Aug 24, 2009

    Linux Kernel 2.4/2.6 (RedHat Linux 9 / Fedora Core 4 < 11 / Whitebox 4 / CentOS 4) - 'sock_sendpage()' Ring0 Privilege Escalation (5)

    Open source ↗
  • Exploit-DBEDB-9477✓ verified
    First seen Aug 18, 2009

    Linux Kernel 2.x (Android) - 'sock_sendpage()' Local Privilege Escalation

    Open source ↗
  • Exploit-DBEDB-9435✓ verified
    First seen Aug 14, 2009

    Linux Kernel 2.x (RedHat) - 'sock_sendpage()' Ring0 Privilege Escalation (1)

    Open source ↗
  • Exploit-DBEDB-9436✓ verified
    First seen Aug 14, 2009

    Linux Kernel 2.x - 'sock_sendpage()' Local Privilege Escalation (4)

    Open source ↗
  • Metasploitexploit/linux/local/sock_sendpage✓ verified
    First seen Aug 13, 2009

    Linux Kernel Sendpage Local Privilege Escalation

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2009-2692?
CVE-2009-2692 is a high vulnerability published on August 14, 2009. The Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does not initialize all function pointers for socket operations in protoops structures, which allows local users to trigger a NULL pointer dereference and gain privileges by using mmap to map page zero, placing arbitrary code on…
When was CVE-2009-2692 disclosed?
CVE-2009-2692 was first published in the National Vulnerability Database on August 14, 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-2009-2692 actively exploited?
CVE-2009-2692 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2009-2692?
CVE-2009-2692 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2009-2692?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-2692, 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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