CVE-2009-2698

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
7.8EG
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: 7.1%CVSS: 7.8Exploit: Exploit-DB (verified) · public exploitExposed services: Not assessed

A fix is available — apply it.

The udp_sendmsg function in the UDP implementation in (1) net/ipv4/udp.c and (2) net/ipv6/udp.c in the Linux kernel before 2.6.19 allows local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) via vectors involving the MSG_MORE flag and a UDP socket.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
66
EG Risk 66/100CISA SSVC

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
Severity78% × 45%
Exploitation65% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
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
7.1%
EPSS %ILE
94th
KEV
Not listed

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 27, 2009

Last Modified

April 23, 2026

Advisory Details (6)

Auto-updated May 30, 2026
Patch available.
generic

About Secunia Research | Flexera

http://secunia.com/advisories/37105
generic

About Secunia Research | Flexera

http://secunia.com/advisories/36510
generic

About Secunia Research | Flexera

http://secunia.com/advisories/36430
generic

About Secunia Research | Flexera

http://secunia.com/advisories/23073
generic
http://rhn.redhat.com/errata/RHSA-2009-1223.html
generic
http://rhn.redhat.com/errata/RHSA-2009-1222.html

Vendor Advisories for CVE-2009-2698(5)

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

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-image-2.6.28-16-imx51 (2.6.28-16.55) @ 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-0:2.4.21-60.EL2009-08-27redhat
redhatkernel-0:2.6.9-89.0.9.EL2009-08-24redhat
redhatkernel-0:2.6.18-128.7.1.el52009-08-24redhat

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.

Affected Packages

(3 across 1 ecosystem)
Debian:4.0(3)
PackageVulnerable rangeFix by version rangeDependents
fai-kernels1.17 ... 1.17etch1 (29 versions)
  • every version up to 1.17+etch.24etch4: fixed in 1.17+etch.24etch4
—
linux-2.62.6.18.dfsg.1-12 ... 2.6.18.dfsg.1-24etch3 (35 versions)
  • every version up to 2.6.18.dfsg.1-24etch4: fixed in 2.6.18.dfsg.1-24etch4
—
user-mode-linux2.6.18-1um-2 ... 2.6.18-1um-2etch4 (27 versions)
  • every version up to 2.6.18-1um-2etch.24etch4: fixed in 2.6.18-1um-2etch.24etch4
—

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 6× in last 7d / 15× 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 121 total refreshes for this CVE.

  1. 2026-10-09 20:00 UTCEPSS rescore
  2. 2026-10-08 16:33 UTCEPSS rescore
  3. 2026-10-07 23:37 UTCEPSS rescore
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  7. 2026-09-30 14:58 UTCEPSS rescore
  8. 2026-09-29 07:59 UTCEG score recompute
  9. 2026-09-27 13:39 UTCEPSS rescore
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  1. 2026-08-08 16:31 UTCEPSS rescore
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  9. 2026-07-23 00:59 UTCEG score recompute
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  13. 2026-07-22 14:03 UTCEPSS rescore
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Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 GitHub PoC) (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-9574✓ verified
    First seen Sep 2, 2009

    Linux Kernel < 2.6.19 (x86/x64) - 'udp_sendmsg' Local Privilege Escalation (2)

    Open source ↗
  • Exploit-DBEDB-9575✓ verified
    First seen Sep 2, 2009

    Linux Kernel < 2.6.19 (Debian 4) - 'udp_sendmsg' Local Privilege Escalation (3)

    Open source ↗
  • Exploit-DBEDB-9542✓ verified
    First seen Aug 31, 2009

    Linux Kernel 2.6 < 2.6.19 (White Box 4 / CentOS 4.4/4.5 / Fedora Core 4/5/6 x86) - 'ip_append_data()' Ring0 Privilege Escalation (1)

    Open source ↗
  • GitHub PoCxiaoxiaoleo/CVE-2009-2698
    First seen Feb 16, 2018

    CVE-2009-2698 compiled for CentOS 4.8

    Open source ↗

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2009-2698?
CVE-2009-2698 is a high vulnerability published on August 27, 2009. The udpsendmsg function in the UDP implementation in (1) net/ipv4/udp.c and (2) net/ipv6/udp.c in the Linux kernel before 2.6.19 allows local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) via vectors involving the MSGMORE flag and a UDP socket.
When was CVE-2009-2698 disclosed?
CVE-2009-2698 was first published on August 27, 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-2009-2698 actively exploited?
CVE-2009-2698 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model classifies it as weaponized: a functional public exploit exists. FIRST EPSS estimates a 7.1% probability of exploitation in the next 30 days (94th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2009-2698?
CVE-2009-2698 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2009-2698?
A fix for CVE-2009-2698 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2009-2698 are linked in the Vendor Advisories panel on this page.

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