CVE-2011-1944

Exp

Integer overflow in xpath.c in libxml2 2.6.x through 2.6.32 and 2.7.x through 2.7.8, and libxml 1.8.16 and earlier, allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted XML file that triggers a heap-based buffer overflow when adding a new namespace node, related to handling of XPath expressions.

Published: 2011-09-02 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1944 is rated High Exploit Risk (88/100): CVSS Critical severity, with high exploitation likelihood (EPSS 23.69%, 96th percentile). 5 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.30% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2011-1944

EDB-ID Source Kind Published Link
35810 exploit_db edb 2011-05-31 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-1944

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-12-28 21.39% 23.69% +2.30%
2 2025-12-07 23.69% 21.39% -2.30%
3 2025-12-01 — 23.69% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1944

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2011-1944

OS Trackers for CVE-2011-1944

vendor priority summary link
debian not yet assigned CVE-2011-1944 not yet assigned priority: Debian including 1 source packages (libxml2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-1944
gentoo high CVE-2011-1944: 1 GLSA(s) (201110-26), 1 atom(s) (dev-libs/libxml2); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-1944
redhat low — https://access.redhat.com/security/cve/CVE-2011-1944
suse critical CVE-2011-1944 severity critical: SUSE including 76 source package names (libxml2-2-2.11.6-2.1, libxml2-2-2.11.6-slfo.1.1_1.2, …), 102 product×package rows across 32 product lines (SUSE Linux Enterprise Desktop 12, SUSE Linux Enterprise Desktop 12 SP1, … (32 product lines)): Fixed 102. https://www.suse.com/security/cve/CVE-2011-1944/
ubuntu medium CVE-2011-1944 medium priority: Ubuntu including 1 source packages (libxml2), 5 status rows across 5 suites (hardy, lucid, maverick, natty, upstream): released 5. https://ubuntu.com/security/CVE-2011-1944

Affected software / configurations for CVE-2011-1944

Vendor Product Version Raw CPE
xmlsoft libxml2 2.6.0 cpe:2.3:a:xmlsoft:libxml2:2.6.0:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.1 cpe:2.3:a:xmlsoft:libxml2:2.6.1:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.2 cpe:2.3:a:xmlsoft:libxml2:2.6.2:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.3 cpe:2.3:a:xmlsoft:libxml2:2.6.3:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.4 cpe:2.3:a:xmlsoft:libxml2:2.6.4:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.5 cpe:2.3:a:xmlsoft:libxml2:2.6.5:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.6 cpe:2.3:a:xmlsoft:libxml2:2.6.6:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.7 cpe:2.3:a:xmlsoft:libxml2:2.6.7:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.8 cpe:2.3:a:xmlsoft:libxml2:2.6.8:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.9 cpe:2.3:a:xmlsoft:libxml2:2.6.9:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.11 cpe:2.3:a:xmlsoft:libxml2:2.6.11:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.12 cpe:2.3:a:xmlsoft:libxml2:2.6.12:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.13 cpe:2.3:a:xmlsoft:libxml2:2.6.13:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.14 cpe:2.3:a:xmlsoft:libxml2:2.6.14:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.16 cpe:2.3:a:xmlsoft:libxml2:2.6.16:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.17 cpe:2.3:a:xmlsoft:libxml2:2.6.17:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.18 cpe:2.3:a:xmlsoft:libxml2:2.6.18:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.20 cpe:2.3:a:xmlsoft:libxml2:2.6.20:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.22 cpe:2.3:a:xmlsoft:libxml2:2.6.22:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.26 cpe:2.3:a:xmlsoft:libxml2:2.6.26:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.27 cpe:2.3:a:xmlsoft:libxml2:2.6.27:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.30 cpe:2.3:a:xmlsoft:libxml2:2.6.30:*:*:*:*:*:*:*
xmlsoft libxml2 2.6.32 cpe:2.3:a:xmlsoft:libxml2:2.6.32:*:*:*:*:*:*:*
xmlsoft libxml2 2.7.0 cpe:2.3:a:xmlsoft:libxml2:2.7.0:*:*:*:*:*:*:*
xmlsoft libxml2 2.7.1 cpe:2.3:a:xmlsoft:libxml2:2.7.1:*:*:*:*:*:*:*
xmlsoft libxml2 2.7.2 cpe:2.3:a:xmlsoft:libxml2:2.7.2:*:*:*:*:*:*:*
xmlsoft libxml2 2.7.3 cpe:2.3:a:xmlsoft:libxml2:2.7.3:*:*:*:*:*:*:*
xmlsoft libxml2 2.7.4 cpe:2.3:a:xmlsoft:libxml2:2.7.4:*:*:*:*:*:*:*
xmlsoft libxml2 2.7.5 cpe:2.3:a:xmlsoft:libxml2:2.7.5:*:*:*:*:*:*:*
xmlsoft libxml2 2.7.6 cpe:2.3:a:xmlsoft:libxml2:2.7.6:*:*:*:*:*:*:*
xmlsoft libxml2 2.7.7 cpe:2.3:a:xmlsoft:libxml2:2.7.7:*:*:*:*:*:*:*
xmlsoft libxml2 2.7.8 cpe:2.3:a:xmlsoft:libxml2:2.7.8:*:*:*:*:*:*:*
xmlsoft libxml <= 1.8.16 cpe:2.3:a:xmlsoft:libxml:*:*:*:*:*:*:*:*
xmlsoft libxml 1.5.0 cpe:2.3:a:xmlsoft:libxml:1.5.0:*:*:*:*:*:*:*
xmlsoft libxml 1.6.0 cpe:2.3:a:xmlsoft:libxml:1.6.0:*:*:*:*:*:*:*
xmlsoft libxml 1.6.1 cpe:2.3:a:xmlsoft:libxml:1.6.1:*:*:*:*:*:*:*
xmlsoft libxml 1.6.2 cpe:2.3:a:xmlsoft:libxml:1.6.2:*:*:*:*:*:*:*
xmlsoft libxml 1.7.0 cpe:2.3:a:xmlsoft:libxml:1.7.0:*:*:*:*:*:*:*
xmlsoft libxml 1.7.1 cpe:2.3:a:xmlsoft:libxml:1.7.1:*:*:*:*:*:*:*
xmlsoft libxml 1.7.2 cpe:2.3:a:xmlsoft:libxml:1.7.2:*:*:*:*:*:*:*
xmlsoft libxml 1.7.3 cpe:2.3:a:xmlsoft:libxml:1.7.3:*:*:*:*:*:*:*
xmlsoft libxml 1.7.4 cpe:2.3:a:xmlsoft:libxml:1.7.4:*:*:*:*:*:*:*
xmlsoft libxml 1.8.0 cpe:2.3:a:xmlsoft:libxml:1.8.0:*:*:*:*:*:*:*
xmlsoft libxml 1.8.1 cpe:2.3:a:xmlsoft:libxml:1.8.1:*:*:*:*:*:*:*
xmlsoft libxml 1.8.2 cpe:2.3:a:xmlsoft:libxml:1.8.2:*:*:*:*:*:*:*
xmlsoft libxml 1.8.3 cpe:2.3:a:xmlsoft:libxml:1.8.3:*:*:*:*:*:*:*
xmlsoft libxml 1.8.4 cpe:2.3:a:xmlsoft:libxml:1.8.4:*:*:*:*:*:*:*
xmlsoft libxml 1.8.5 cpe:2.3:a:xmlsoft:libxml:1.8.5:*:*:*:*:*:*:*
xmlsoft libxml 1.8.6 cpe:2.3:a:xmlsoft:libxml:1.8.6:*:*:*:*:*:*:*
xmlsoft libxml 1.8.7 cpe:2.3:a:xmlsoft:libxml:1.8.7:*:*:*:*:*:*:*
xmlsoft libxml 1.8.8 cpe:2.3:a:xmlsoft:libxml:1.8.8:*:*:*:*:*:*:*
xmlsoft libxml 1.8.9 cpe:2.3:a:xmlsoft:libxml:1.8.9:*:*:*:*:*:*:*
xmlsoft libxml 1.8.10 cpe:2.3:a:xmlsoft:libxml:1.8.10:*:*:*:*:*:*:*
xmlsoft libxml 1.8.11 cpe:2.3:a:xmlsoft:libxml:1.8.11:*:*:*:*:*:*:*
xmlsoft libxml 1.8.12 cpe:2.3:a:xmlsoft:libxml:1.8.12:*:*:*:*:*:*:*
xmlsoft libxml 1.8.13 cpe:2.3:a:xmlsoft:libxml:1.8.13:*:*:*:*:*:*:*
xmlsoft libxml 1.8.14 cpe:2.3:a:xmlsoft:libxml:1.8.14:*:*:*:*:*:*:*
xmlsoft libxml 1.8.15 cpe:2.3:a:xmlsoft:libxml:1.8.15:*:*:*:*:*:*:*

References for CVE-2011-1944

URL Tags
http://git.gnome.org/browse/libxml2/commit/?id=d7958b21e7f8c447a26bb2436f08402b2c308be4 Patch
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
http://lists.apple.com/archives/security-announce/2012/May/msg00001.html
http://lists.apple.com/archives/security-announce/2012/Sep/msg00003.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062238.html Exploit Patch
http://lists.opensuse.org/opensuse-updates/2011-07/msg00035.html
http://rhn.redhat.com/errata/RHSA-2013-0217.html
http://scarybeastsecurity.blogspot.com/2011/05/libxml-vulnerability-and-interesting.html Patch Vendor Advisory
http://secunia.com/advisories/44711 Vendor Advisory
http://support.apple.com/kb/HT5281
http://support.apple.com/kb/HT5503
http://ubuntu.com/usn/usn-1153-1
http://www.debian.org/security/2011/dsa-2255
http://www.mandriva.com/security/advisories?name=MDVSA-2011:131
http://www.openwall.com/lists/oss-security/2011/05/31/8 Exploit Patch
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
http://www.osvdb.org/73248
http://www.redhat.com/support/errata/RHSA-2011-1749.html
http://www.securityfocus.com/bid/48056 Exploit
https://bugzilla.redhat.com/show_bug.cgi?id=709747 Exploit Patch
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