libxml2: Heap-based buffer overflow by adding new namespace node to an existing nodeset or merging nodesets
Published Sep 2, 2011
9.3
HIGHCVSS 2.0
EPSS 13.43%
Description
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.
Affected products
No data.
Configuration 1
- 2.6.0
- 2.6.1
- 2.6.2
- 2.6.3
- 2.6.4
- 2.6.5
- 2.6.6
- 2.6.7
- 2.6.8
- 2.6.9
- 2.6.11
- 2.6.12
- 2.6.13
- 2.6.14
- 2.6.16
- 2.6.17
- 2.6.18
- 2.6.20
- 2.6.22
- 2.6.26
- 2.6.27
- 2.6.30
- 2.6.32
Configuration 2
- 2.7.0
- 2.7.1
- 2.7.2
- 2.7.3
- 2.7.4
- 2.7.5
- 2.7.6
- 2.7.7
- 2.7.8
Configuration 3
- ≤ 1.8.16
- 1.5.0
- 1.6.0
- 1.6.1
- 1.6.2
- 1.7.0
- 1.7.1
- 1.7.2
- 1.7.3
- 1.7.4
- 1.8.0
- 1.8.1
- 1.8.2
- 1.8.3
- 1.8.4
- 1.8.5
- 1.8.6
- 1.8.7
- 1.8.8
- 1.8.9
- 1.8.10
- 1.8.11
- 1.8.12
- 1.8.13
- 1.8.14
- 1.8.15
No data.
Red Hat Enterprise Linux 5
libxml2-0:2.6.26-2.1.12.el5_7.2
Fixed · RHSA-2012:0017
Red Hat Enterprise Linux 6
libxml2-0:2.7.6-4.el6
Fixed · RHSA-2011:1749
Red Hat Enterprise Linux 6
mingw32-libxml2-0:2.7.6-6.el6_3
Fixed · RHSA-2013:0217
Red Hat Enterprise Linux 4
libxml2
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | libxml2-0:2.6.26-2.1.12.el5_7.2 | Fixed | RHSA-2012:0017 |
| Red Hat Enterprise Linux 6 | libxml2-0:2.7.6-4.el6 | Fixed | RHSA-2011:1749 |
| Red Hat Enterprise Linux 6 | mingw32-libxml2-0:2.7.6-6.el6_3 | Fixed | RHSA-2013:0217 |
| Red Hat Enterprise Linux 4 | libxml2 | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (23 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 13.43% (0.13432) | 96.31th | v5 (v2026.06.15) |
| Jun 15, 2026 | 13.73% (0.13727) | 96.01th | v5 (v2026.06.15) |
| Dec 28, 2025 | 23.69% (0.23686) | 95.81th | v4 (v2025.03.14) |
| Dec 7, 2025 | 21.39% (0.21386) | 95.48th | v4 (v2025.03.14) |
| Dec 1, 2025 | 23.69% (0.23686) | 95.80th | v4 (v2025.03.14) |
| Jul 24, 2025 | 17.55% (0.17548) | 94.77th | v4 (v2025.03.14) |
| Jul 13, 2025 | 16.51% (0.16509) | 94.59th | v4 (v2025.03.14) |
| May 3, 2025 | 22.58% (0.22578) | 95.51th | v4 (v2025.03.14) |
| Apr 17, 2025 | 19.10% (0.19102) | 94.95th | v4 (v2025.03.14) |
| Mar 30, 2025 | 15.68% (0.15678) | 94.14th | v4 (v2025.03.14) |
| Mar 29, 2025 | 28.52% (0.28517) | 94.48th | v4 (v2025.03.14) |
| Mar 17, 2025 | 15.68% (0.15678) | 94.20th | v4 (v2025.03.14) |
| Dec 17, 2024 | 1.92% (0.01919) | 88.29th | v3 (v2023.03.01) |
| Dec 12, 2024 | 0.70% (0.00705) | 81.01th | v3 (v2023.03.01) |
| Jun 11, 2024 | 0.68% (0.00676) | 79.91th | v3 (v2023.03.01) |
| Apr 22, 2024 | 0.78% (0.00776) | 81.11th | v3 (v2023.03.01) |
| Mar 2, 2024 | 0.93% (0.00933) | 82.58th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.66% (0.00659) | 78.88th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.66% (0.00659) | 76.37th | v3 (v2023.03.01) |
| Mar 6, 2023 | 10.18% (0.10179) | 94.57th | v2 (v2022.01.01) |
| Apr 1, 2022 | 10.18% (0.10179) | 94.10th | v2 (v2022.01.01) |
| Feb 16, 2022 | 10.18% (0.10179) | 87.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 12.05% (0.12050) | 89.20th | v2 (v2022.01.01) |
References (23)
- http://git.gnome.org/browse/libxml2/commit/?id=d7958b21e7f8c447a26bb2436f08402b2c308be4 x_refsource_CONFIRMPatch
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041 vendor-advisoryx_refsource_HP
- http://lists.apple.com/archives/security-announce/2012/May/msg00001.html vendor-advisoryx_refsource_APPLE
- http://lists.apple.com/archives/security-announce/2012/Sep/msg00003.html vendor-advisoryx_refsource_APPLE
- http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062238.html vendor-advisoryx_refsource_FEDORAExploitPatch
- http://lists.opensuse.org/opensuse-updates/2011-07/msg00035.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2013-0217.html vendor-advisoryx_refsource_REDHAT
- http://scarybeastsecurity.blogspot.com/2011/05/libxml-vulnerability-and-interesting.html x_refsource_MISCPatchVendor Advisory
- http://secunia.com/advisories/44711 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://support.apple.com/kb/HT5281 x_refsource_CONFIRM
- http://support.apple.com/kb/HT5503 x_refsource_CONFIRM
- http://ubuntu.com/usn/usn-1153-1 vendor-advisoryx_refsource_UBUNTU
- http://www.debian.org/security/2011/dsa-2255 vendor-advisoryx_refsource_DEBIAN
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:131 vendor-advisoryx_refsource_MANDRIVA
- http://www.openwall.com/lists/oss-security/2011/05/31/8 mailing-listx_refsource_MLISTExploitPatch
- http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html x_refsource_CONFIRM
- http://www.osvdb.org/73248 vdb-entryx_refsource_OSVDB
- http://www.redhat.com/support/errata/RHSA-2011-1749.html vendor-advisoryx_refsource_REDHAT
- http://www.securityfocus.com/bid/48056 vdb-entryx_refsource_BIDExploit
- https://access.redhat.com/security/cve/CVE-2011-1944 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=709747 x_refsource_CONFIRMExploitPatchIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-1944
- https://www.cve.org/CVERecord?id=CVE-2011-1944
Change history (0)
No recorded changes yet.