No exploitation reportedFix available

CVE-2009-2416

Q: Is CVE-2009-2416 actively exploited?

Active exploitation of CVE-2009-2416 has not been confirmed. Its EPSS score was 2.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2009-2416?

CVE-2009-2416 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2009-08-11
WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Multiple use-after-free vulnerabilities in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27, and 2.6.32, and libxml 1.8.17, allow context-dependent attackers to cause a denial of service (application crash) via crafted (1) Notation or (2) Enumeration attribute types in an XML file, as demonstrated by the Codenomicon XML fuzzing framework.

Timeline

dates in UTC

2009-08-1118:30CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2009-2416?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2009-2416?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Xmlsoft libxml2

Branch	Affected	Fixed in	Source
2.5	= 2.5.10	no fix published	NVD
2.6	= 2.6.16	no fix published	NVD
2.6	= 2.6.26	no fix published	NVD
2.6	= 2.6.27	no fix published	NVD
2.6	= 2.6.32	no fix published	NVD

Canonical ubuntu linux

Branch	Affected	Fixed in	Source
6.6	= 6.06	no fix published	NVD
8.4	= 8.04	no fix published	NVD
8.10	= 8.10	no fix published	NVD
9.4	= 9.04	no fix published	NVD

Apple mac os x

Branch	Affected	Fixed in	Source
10.6	≥ 10.6.0, < 10.6.2	10.6.2	NVD
10.5	≥ 10.5.0, < 10.5.8	10.5.8	NVD
10.4	< 10.4.11	10.4.11	NVD

16 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

CVE-2009-2416 Red Hat Product Security381 products fixed
mingw32-libxml2: Pointer use-after-free flaws by parsing Notation and Enumeration attribute types
RHSA-2009:1206 Red Hat Product Security211 products fixed
Red Hat Security Advisory: libxml and libxml2 security update

Full record on NVD

Fix

Vendor fix Red Hat Product Security RHSA-2009:1206 · 211 productsBefore applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

Advisories and patches

googlechromereleases.blogspot.comRelease Notes
www.debian.orgPatch
www.mail-archive.comPatch
bugzilla.redhat.comPatch
git.gnome.orgPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-02-06
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.16.52025-01-21
NVDCVSS 3.16.5read 2026-10-23
NVDCVSS 2.04.3read 2026-10-23
CISA-ADPweakness (CWE)CWE-4162025-01-21
NVDweakness (CWE)CWE-416read 2026-10-23
FIRST EPSSEPSS score2.0 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published: 2009-08-11
Last Modified: 2026-04-23
NVD status: Modified

Frequently asked questions

What is CVE-2009-2416?

Is CVE-2009-2416 actively exploited?

Active exploitation of CVE-2009-2416 has not been confirmed. Its EPSS score was 2.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2009-2416?

CVE-2009-2416 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

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