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Fencer Vulns
high 7.5

CVE-2024-34459 json

An issue was discovered in xmllint (from libxml2) before 2.11.8 and 2.12.x before 2.12.7

published 2024-05-13 2 y ago modified 2026-10-15 25 d ago also EUVD-2024-34814 , JLSEC-2025-84

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

An issue was discovered in xmllint (from libxml2) before 2.11.8 and 2.12.x before 2.12.7. Formatting error messages with xmllint --htmlout can result in a buffer over-read in xmlHTMLPrintFileContext in xmllint.c.

Patch / fix

  • julia XML2_jll 2.12.7+0
  • xmlsoft xmllint 2.11.8, 2.12.7
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • libxml2 Debian 12 2.9.14+dfsg-1.3~deb12u2
  • libxml2 Debian 14, Debian 13 2.12.7+dfsg+really2.9.14-0.4

debian advisories DEBIAN-CVE-2024-34459

  • libxml2 Ubuntu 20.04 LTS 2.9.10+dfsg-5ubuntu0.20.04.8
  • libxml2 Ubuntu 22.04 LTS 2.9.13+dfsg-1ubuntu0.5
  • libxml2 Ubuntu 24.04 LTS 2.9.14+dfsg-1.3ubuntu3.1
  • libxml2 Ubuntu Pro 14.04 LTS 2.9.1+dfsg1-3ubuntu4.13+esm7
  • libxml2 Ubuntu Pro 16.04 LTS 2.9.3+dfsg1-1ubuntu0.7+esm7
  • libxml2 Ubuntu Pro 18.04 LTS 2.9.4+dfsg1-6.1ubuntu1.9+esm2

ubuntu advisories UBUNTU-CVE-2024-34459

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libxml2 RHEL 9 2.9.13-14.el9_8.1
  • python3-libxml2 RHEL 9 2.9.13-14.el9_8.1
  • libxml2 RHEL 10.2 2.12.5-10.el10_2.1
  • python3-libxml2 RHEL 10.2 2.12.5-10.el10_2.1
  • libxml2 RHEL 8 2.9.7-21.el8_10.5
  • python3-libxml2 RHEL 8 2.9.7-21.el8_10.5
  • libxml2 enterprise linux eus 10.0 2.12.5-9.el10_0.1
  • python3-libxml2 enterprise linux eus 10.0 2.12.5-9.el10_0.1

red hat advisories RHSA-2026:33635RHSA-2026:33632RHSA-2026:33633RHSA-2026:33634RHSA-2026:28254RHSA-2026:28234

  • libxml2 Linux Micro 6.0 2.11.6-3.1
  • libxml2 SLE Module for Basesystem 15 SP6, SLE Module for Basesystem 15 SP5, SLE Micro 5.5 +2 more 2.10.3-150500.5.17.1
  • libxml2-python SLE Module for Python 3 15 SP6, SLE Module for Python 3 15 SP5, SLE Module for Basesystem 15 SP6 +4 more 2.10.3-150500.5.17.1
  • libxml2 SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 2.9.4-46.75.1
  • python-libxml2 SLES for SAP 12 SP5, SLES 12 SP5 2.9.4-46.75.1
  • libxml2 SLE Micro 5.4, SLE Micro 5.3 2.9.14-150400.5.32.1
  • libxml2-python SLE Micro 5.4, SLE Micro 5.3 2.9.14-150400.5.32.1
  • libxml2 SLE Micro 5.2, SLE Micro 5.1 2.9.7-150000.3.70.1

suse advisories SUSE-SU-2025:20043-1SUSE-SU-2024:2290-1SUSE-SU-2024:2288-1SUSE-SU-2024:2279-1SUSE-SU-2024:2267-1

  • libxml2 openSUSE Tumbleweed 2.12.7-1.1

opensuse advisories openSUSE-SU-2024:13971-1

  • libxml2 AlmaLinux 10 2.12.5-10.el10_2.1
  • python3-libxml2 AlmaLinux 10 2.12.5-10.el10_2.1
  • libxml2 AlmaLinux 9 2.9.13-14.el9_8.1
  • python3-libxml2 AlmaLinux 9 2.9.13-14.el9_8.1
  • libxml2 AlmaLinux 8 2.9.7-21.el8_10.5
  • python3-libxml2 AlmaLinux 8 2.9.7-21.el8_10.5

almalinux advisories ALSA-2026:28234ALSA-2026:28254ALSA-2026:26354

  • libxml2 Rocky Linux 10 2.12.5-10.el10_2.1
  • libxml2 Rocky Linux 9 2.9.13-14.el9_8.1
  • libxml2 Rocky Linux 8 2.9.7-21.el8_10.5

rocky linux advisories RLSA-2026:28234RLSA-2026:28254RLSA-2026:26354

  • libxml2 Alpine 3.19, Alpine 3.18 2.11.8-r0
  • libxml2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 2.12.7-r0

alpine advisories ALPINE-CVE-2024-34459

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libxml2 CBL-Mariner 2.0 2.10.4-3
  • libxml2 Azure Linux 3.0 2.11.5-3

azure linux advisories AZL-42019AZL-42027

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2024-34459 updated cvss 5.5

libxml2: buffer over-read in xmlHTMLPrintFileContext in xmllint.c

  • Red Hat Enterprise Linux 6 libxml2, libxml2-python Red Hat Enterprise Linux 7 libxml2, libxml2-python
    affected: workaround, no fix planned “Do not process untrusted files with the xmllint program.”
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.17 cert-manager/cert-manager-operator-rhel9 1791788287, cert-manager/jetstack-cert-manager-rhel9 1791371069, cert-manager/cert-manager-operator-bundle 1791970484, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791371080
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:82888
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.18 cert-manager/cert-manager-operator-rhel9 1789029076, cert-manager/jetstack-cert-manager-rhel9 1791459711, cert-manager/cert-manager-istio-csr-rhel9 1791459759, cert-manager/cert-manager-operator-bundle 1791966259, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791459707
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:82354
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20 cert-manager/cert-manager-trust-manager-rhel9 1790598593
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:72502
  • Red Hat Discovery 2 discovery/discovery-ui-rhel9 1782756541, discovery/discovery-server-rhel9 1782763840
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:33313
  • Red Hat Enterprise Linux AppStream (v. 8) libxml2-devel 2.9.7-21.el8_10.5, libxml2-debuginfo 2.9.7-21.el8_10.5, libxml2-debugsource 2.9.7-21.el8_10.5, python3-libxml2-debuginfo 2.9.7-21.el8_10.5
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:26354
  • Red Hat Enterprise Linux AppStream (v. 9) libxml2-devel 2.9.13-14.el9_8.1, libxml2-debuginfo 2.9.13-14.el9_8.1, libxml2-debugsource 2.9.13-14.el9_8.1, python3-libxml2-debuginfo 2.9.13-14.el9_8.1
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:28254
  • Red Hat Enterprise Linux AppStream (v. 10) libxml2-devel 2.12.5-10.el10_2.1, libxml2-debuginfo 2.12.5-10.el10_2.1, libxml2-debugsource 2.12.5-10.el10_2.1, python3-libxml2-debuginfo 2.12.5-10.el10_2.1
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:28234
show 29 more
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) libxml2-devel 2.9.7-9.el8_4.10, libxml2-debuginfo 2.9.7-9.el8_4.10, libxml2-debugsource 2.9.7-9.el8_4.10, python3-libxml2-debuginfo 2.9.7-9.el8_4.10
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27736
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) libxml2-devel 2.9.7-13.el8_6.14, libxml2-debuginfo 2.9.7-13.el8_6.14, libxml2-debugsource 2.9.7-13.el8_6.14, python3-libxml2-debuginfo 2.9.7-13.el8_6.14
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27737
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) libxml2-devel 2.9.7-16.el8_8.14, libxml2-debuginfo 2.9.7-16.el8_8.14, libxml2-debugsource 2.9.7-16.el8_8.14, python3-libxml2-debuginfo 2.9.7-16.el8_8.14
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27739
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) libxml2-devel 2.9.13-3.el9_2.11, libxml2-debuginfo 2.9.13-3.el9_2.11, libxml2-debugsource 2.9.13-3.el9_2.11, python3-libxml2-debuginfo 2.9.13-3.el9_2.11
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:33633
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) libxml2-devel 2.9.13-13.el9_4.1, libxml2-debuginfo 2.9.13-13.el9_4.1, libxml2-debugsource 2.9.13-13.el9_4.1, python3-libxml2-debuginfo 2.9.13-13.el9_4.1
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:33632
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) libxml2-devel 2.12.5-9.el10_0.1, libxml2-debuginfo 2.12.5-9.el10_0.1, libxml2-debugsource 2.12.5-9.el10_0.1, python3-libxml2-debuginfo 2.12.5-9.el10_0.1
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:33635
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) libxml2-devel 2.9.13-12.el9_6.2, libxml2-debuginfo 2.9.13-12.el9_6.2, libxml2-debugsource 2.9.13-12.el9_6.2, python3-libxml2-debuginfo 2.9.13-12.el9_6.2
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:33634
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) libxml2-devel 2.9.7-9.el8_4.10, libxml2-debuginfo 2.9.7-9.el8_4.10, libxml2-debugsource 2.9.7-9.el8_4.10, python3-libxml2-debuginfo 2.9.7-9.el8_4.10
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27736
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) libxml2-devel 2.9.7-13.el8_6.14, libxml2-debuginfo 2.9.7-13.el8_6.14, libxml2-debugsource 2.9.7-13.el8_6.14, python3-libxml2-debuginfo 2.9.7-13.el8_6.14
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27737
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) libxml2-devel 2.9.7-16.el8_8.14, libxml2-debuginfo 2.9.7-16.el8_8.14, libxml2-debugsource 2.9.7-16.el8_8.14, python3-libxml2-debuginfo 2.9.7-16.el8_8.14
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27739
  • Red Hat Enterprise Linux BaseOS (v. 8) libxml2 2.9.7-21.el8_10.5, python3-libxml2 2.9.7-21.el8_10.5
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:26354
  • Red Hat Enterprise Linux BaseOS (v. 9) libxml2 2.9.13-14.el9_8.1, python3-libxml2 2.9.13-14.el9_8.1
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:28254
  • Red Hat Enterprise Linux BaseOS (v. 10) libxml2 2.12.5-10.el10_2.1, python3-libxml2 2.12.5-10.el10_2.1
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:28234
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) libxml2 2.9.7-9.el8_4.10, python3-libxml2 2.9.7-9.el8_4.10
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27736
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) libxml2 2.9.7-13.el8_6.14, python3-libxml2 2.9.7-13.el8_6.14
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27737
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) libxml2 2.9.7-16.el8_8.14, python3-libxml2 2.9.7-16.el8_8.14
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27739
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) libxml2 2.9.13-3.el9_2.11, python3-libxml2 2.9.13-3.el9_2.11
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:33633
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) libxml2 2.9.13-13.el9_4.1, python3-libxml2 2.9.13-13.el9_4.1
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:33632
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) libxml2 2.12.5-9.el10_0.1, python3-libxml2 2.12.5-9.el10_0.1
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:33635
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) libxml2 2.9.13-12.el9_6.2, python3-libxml2 2.9.13-12.el9_6.2
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:33634
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) libxml2 2.9.7-9.el8_4.10, python3-libxml2 2.9.7-9.el8_4.10
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27736
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) libxml2 2.9.7-13.el8_6.14, python3-libxml2 2.9.7-13.el8_6.14
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27737
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) libxml2 2.9.7-16.el8_8.14, python3-libxml2 2.9.7-16.el8_8.14
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:27739
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libxml2-static 2.12.5-10.el10_2.1, libxml2-debuginfo 2.12.5-10.el10_2.1, libxml2-debugsource 2.12.5-10.el10_2.1, python3-libxml2-debuginfo 2.12.5-10.el10_2.1
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:28234
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libxml2-static 2.12.5-9.el10_0.1, libxml2-debuginfo 2.12.5-9.el10_0.1, libxml2-debugsource 2.12.5-9.el10_0.1, python3-libxml2-debuginfo 2.12.5-9.el10_0.1
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:33635
  • Red Hat Insights proxy 1.5 insights-proxy/insights-proxy-container-rhel9 1782890503
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:34102
  • Red Hat OpenShift AI 3.4 rhai/base-image-neuron-rhel9 1790703542
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:74674
  • Red Hat Update Infrastructure 5 rhui5/cds-rhel9 1784794778, rhui5/rhua-rhel9 1784795076, rhui5/haproxy-rhel9 1784795112, rhui5/rhua-tp-rhel9 1787241260, rhui5/installer-rhel9 1784794289, rhui5/installer-tp-rhel9 1787135742, +2 more
    fixed: vendor fix “Do not process untrusted files with the xmllint program.” RHSA-2026:44481
  • Red Hat JBoss Core Services libxml2 Red Hat Update Infrastructure 5 rhui5/cds-tp-rhel9 1787241206
    not affected: vulnerable code not present

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

cisa ICSA-23-348-10 updated cvss 5.5

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.80% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • gitlab.gnome.org https://gitlab.gnome.org/GNOME/libxml2/-/issues/720 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
julia XML2_jll
<2.12.7+0
2.12.7+0

Affected products

  • xmlsoft xmllint
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.