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Fencer Intel
critical 9.3

CVE-2011-1944 in the critical feed json

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-dependen…

published 2011-09-02 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1941

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
13.4%
EPSS 13.4% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • libxml2 Debian 14, Debian 13, Debian 12 2.7.8.dfsg-3

debian advisories DEBIAN-CVE-2011-1944

  • mingw32-libxml2 RHEL 6 2.7.6-6.el6_3
  • libxml2 RHEL 5 2.6.26-2.1.12.el5_7.2
  • libxml2-python RHEL 5 2.6.26-2.1.12.el5_7.2
  • libxml2 RHEL 6 2.7.6-4.el6
  • libxml2-python RHEL 6 2.7.6-4.el6

red hat advisories RHSA-2013:0217RHSA-2012:0017RHSA-2011:1749

  • libxml2 openSUSE Tumbleweed 2.9.4-1.22

opensuse advisories openSUSE-SU-2024:10192-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-1944 updated cvss 5.1

libxml2: Heap-based buffer overflow by adding new namespace node to an existing nodeset or merging nodesets

  • Red Hat Enterprise Linux 4 libxml2
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux (v. 5 server) libxml2 2.6.26-2.1.12.el5_7.2, libxml2-python 2.6.26-2.1.12.el5_7.2 Red Hat Enterprise Linux Desktop (v. 5 client) libxml2 2.6.26-2.1.12.el5_7.2, libxml2-python 2.6.26-2.1.12.el5_7.2
    fixed: vendor fix RHSA-2012:0017
  • Red Hat Enterprise Linux Desktop (v. 6) libxml2 2.7.6-4.el6, libxml2-python 2.7.6-4.el6
    fixed: vendor fix RHSA-2011:1749
  • Red Hat Enterprise Linux Desktop Optional (v. 6) libxml2 2.7.6-4.el6, mingw32-libxml2 2.7.6-6.el6_3
    fixed: vendor fix RHSA-2013:0217
  • Red Hat Enterprise Linux HPC Node (v. 6) libxml2 2.7.6-4.el6, libxml2-python 2.7.6-4.el6
    fixed: vendor fix RHSA-2011:1749
  • Red Hat Enterprise Linux HPC Node Optional (v. 6) libxml2 2.7.6-4.el6, mingw32-libxml2 2.7.6-6.el6_3
    fixed: vendor fix RHSA-2013:0217
  • Red Hat Enterprise Linux Server (v. 6) libxml2 2.7.6-4.el6, libxml2-python 2.7.6-4.el6
    fixed: vendor fix RHSA-2011:1749
  • Red Hat Enterprise Linux Server Optional (v. 6) libxml2 2.7.6-4.el6, mingw32-libxml2 2.7.6-6.el6_3
    fixed: vendor fix RHSA-2013:0217
show 3 more
  • Red Hat Enterprise Linux Workstation (v. 6) libxml2 2.7.6-4.el6, libxml2-python 2.7.6-4.el6
    fixed: vendor fix RHSA-2011:1749
  • Red Hat Enterprise Linux Workstation Optional (v. 6) libxml2 2.7.6-4.el6, mingw32-libxml2 2.7.6-6.el6_3
    fixed: vendor fix RHSA-2013:0217
  • Red Hat RHEL Desktop Workstation (v. 5 client) libxml2 2.6.26-2.1.12.el5_7.2
    fixed: vendor fix RHSA-2012:0017

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-35810)
  2. Published

Exploit prediction

13.43% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-35810 libxmlInvalid 2.7.x - XPath Multiple Memory Corruption Vulnerabilities remote, 2011-05-31
  • lists.fedoraproject.org http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062238.html referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=709747 referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://www.openwall.com/lists/oss-security/2011/05/31/8 referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/bid/48056 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness

References

Sources

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