CVE-2025-6021
Libxml2: integer overflow in xmlbuildqname() leads to stack buffer overflow in libxml2
CVE-2025-6021 is fixed in 11 products on 1 platform, first by RHSA-2025:10630, released June 12, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
9.1
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0147
73rd percentile
A flaw was found in libxml2's xmlBuildQName function, where integeroverflows in buffer size calculations can lead to a stack-based bufferoverflow. This issue can result in memory corruption or a denial of servicewhen processing crafted input.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libxml2 · Debian 12.15 (bookworm) | 2.9.14+dfsg-1.3~deb12u3 | DEBIAN-CVE-2025-6021 | Jun 12, 2025 |
| libxml2 · Debian 13.5 (trixie) | 2.12.7+dfsg+really2.9.14-2 | DEBIAN-CVE-2025-6021 | Jun 12, 2025 |
| libxml2 · Debian 14 | 2.12.7+dfsg+really2.9.14-2 | DEBIAN-CVE-2025-6021 | Jun 12, 2025 |
| libxml2 · RHEL 10 | 2.12.5-7.el10_0 | RHSA-2025:10630 | Jun 12, 2025 |
| libxml2 · RHEL 8 | 0:2.9.7-21.el8_10.1 | RHSA-2025:10698 | Jul 9, 2025 |
| libxml2 · RHEL 9 | 0:2.9.13-10.el9_6 | RHSA-2025:10699 | Jul 9, 2025 |
| libxml2 · Ubuntu 18.04.6 LTS (bionic) | 2.9.4+dfsg1-6.1ubuntu1.9+esm4 | libxml2 2.9.4+dfsg1-6.1ubuntu1.9+esm4 | Jun 16, 2025 |
| libxml2 · Ubuntu 20.04 LTS (focal) | 2.9.10+dfsg-5ubuntu0.20.04.10+esm1 | libxml2 2.9.10+dfsg-5ubuntu0.20.04.10+esm1 | Jun 16, 2025 |
| libxml2 · Ubuntu 22.04.1 LTS (jammy) | 2.9.13+dfsg-1ubuntu0.8 | libxml2 2.9.13+dfsg-1ubuntu0.8 | Jun 16, 2025 |
| libxml2 · Ubuntu 24.04.5 LTS (noble) | 2.9.14+dfsg-1.3ubuntu3.4 | libxml2 2.9.14+dfsg-1.3ubuntu3.4 | Jun 16, 2025 |
| libxml2 · Ubuntu 25.04 (plucky) | 2.12.7+dfsg+really2.9.14-0.4ubuntu0.2 | libxml2 2.12.7+dfsg+really2.9.14-0.4ubuntu0.2 | Jan 16, 2026 |
| libxml2 · almalinux 10 | 2.12.5-7.el10_0 | ALSA-2025:10630 | Jul 8, 2025 |
| libxml2 · almalinux 8 | 2.9.7-21.el8_10.1 | ALSA-2025:10698 | Jul 9, 2025 |
| libxml2 · almalinux 9 | 2.9.13-10.el9_6 | ALSA-2025:10699 | Jul 9, 2025 |
| libxml2 · amzn 2023 | 2.10.4-1.amzn2023.0.11 | ALAS2023-2025-1019 | Jun 18, 2025 |
| libxml2 · ol 10 | 0:2.12.5-7.el10_0 | ELSA-2025-10630 | Jul 8, 2025 |
| libxml2 · ol 8 | 0:2.9.7-21.el8_10.1 | ELSA-2025-10698 | Jul 9, 2025 |
| libxml2 · ol 9 | 0:2.9.13-10.el9_6 | ELSA-2025-10699 | Jul 9, 2025 |
| libxml2 · opensuse-leap 15.6 | 2.10.3-150500.5.29.1 | SUSE-SU-2025:02314-1 | Jul 15, 2025 |
| libxml2 · rocky 10 | 0:2.12.5-7.el10_0 | RLSA-2025:10630 | Oct 3, 2025 |
| libxml2 · rocky 8 | 0:2.9.7-21.el8_10.1 | RLSA-2025:10698 | Jul 29, 2025 |
| libxml2 · rocky 9 | 0:2.9.13-10.el9_6 | RLSA-2025:10699 | Oct 4, 2025 |
| libxml2 · sles 15.6 | 2.10.3-150500.5.29.1 | SUSE-SU-2025:02314-1 | Jul 15, 2025 |
| libxml2 · sles 15.7 | 2.12.10-150700.4.3.1 | SUSE-SU-2025:02260-1 | Jul 9, 2025 |
| libxml2-debuginfo · amzn 2023 | 2.10.4-1.amzn2023.0.11 | ALAS2023-2025-1019 | Jun 18, 2025 |
| libxml2-debugsource · amzn 2023 | 2.10.4-1.amzn2023.0.11 | ALAS2023-2025-1019 | Jun 18, 2025 |
| libxml2-devel · RHEL 8 | 0:2.9.7-21.el8_10.1 | RHSA-2025:10698 | Jul 9, 2025 |
| libxml2-devel · RHEL 9 | 0:2.9.13-10.el9_6 | RHSA-2025:10699 | Jul 9, 2025 |
| libxml2-devel · almalinux 10 | 2.12.5-7.el10_0 | ALSA-2025:10630 | Jul 8, 2025 |
| libxml2-devel · almalinux 8 | 2.9.7-21.el8_10.1 | ALSA-2025:10698 | Jul 9, 2025 |
| libxml2-devel · almalinux 9 | 2.9.13-10.el9_6 | ALSA-2025:10699 | Jul 9, 2025 |
| libxml2-devel · amzn 2023 | 2.10.4-1.amzn2023.0.11 | ALAS2023-2025-1019 | Jun 18, 2025 |
| libxml2-devel · ol 10 | 0:2.12.5-7.el10_0 | ELSA-2025-10630 | Jul 8, 2025 |
| libxml2-devel · ol 8 | 0:2.9.7-21.el8_10.1 | ELSA-2025-10698 | Jul 9, 2025 |
| libxml2-devel · ol 9 | 0:2.9.13-10.el9_6 | ELSA-2025-10699 | Jul 9, 2025 |
| libxml2-python · opensuse-leap 15.6 | 2.10.3-150500.5.29.1 | SUSE-SU-2025:02314-1 | Jul 15, 2025 |
| libxml2-python · sles 15.6 | 2.10.3-150500.5.29.1 | SUSE-SU-2025:02314-1 | Jul 15, 2025 |
| libxml2-python · sles 15.7 | 2.12.10-150700.4.3.1 | SUSE-SU-2025:02260-1 | Jul 9, 2025 |
| libxml2-static · almalinux 10 | 2.12.5-7.el10_0 | ALSA-2025:10630 | Jul 8, 2025 |
| libxml2-static · amzn 2023 | 2.10.4-1.amzn2023.0.11 | ALAS2023-2025-1019 | Jun 18, 2025 |
| libxml2-static · ol 10 | 0:2.12.5-7.el10_0 | ELSA-2025-10630 | Jul 8, 2025 |
| libxml2-utils · Ubuntu 18.04.6 LTS (bionic) | 2.9.4+dfsg1-6.1ubuntu1.9+esm4 | libxml2-utils 2.9.4+dfsg1-6.1ubuntu1.9+esm4 | Jun 16, 2025 |
| libxml2-utils · Ubuntu 20.04 LTS (focal) | 2.9.10+dfsg-5ubuntu0.20.04.10+esm1 | libxml2-utils 2.9.10+dfsg-5ubuntu0.20.04.10+esm1 | Jun 16, 2025 |
| libxml2-utils · Ubuntu 22.04.1 LTS (jammy) | 2.9.13+dfsg-1ubuntu0.8 | libxml2-utils 2.9.13+dfsg-1ubuntu0.8 | Jun 16, 2025 |
| libxml2-utils · Ubuntu 24.04.5 LTS (noble) | 2.9.14+dfsg-1.3ubuntu3.4 | libxml2-utils 2.9.14+dfsg-1.3ubuntu3.4 | Jun 16, 2025 |
| libxml2-utils · Ubuntu 25.04 (plucky) | 2.12.7+dfsg+really2.9.14-0.4ubuntu0.2 | libxml2-utils 2.12.7+dfsg+really2.9.14-0.4ubuntu0.2 | Jan 16, 2026 |
| python-libxml2 · Ubuntu 18.04.6 LTS (bionic) | 2.9.4+dfsg1-6.1ubuntu1.9+esm4 | python-libxml2 2.9.4+dfsg1-6.1ubuntu1.9+esm4 | Jun 16, 2025 |
| python-libxml2 · Ubuntu 20.04 LTS (focal) | 2.9.10+dfsg-5ubuntu0.20.04.10+esm1 | python-libxml2 2.9.10+dfsg-5ubuntu0.20.04.10+esm1 | Jun 16, 2025 |
| python-libxml2-python · opensuse-leap 15.6 | 2.9.7-150000.3.82.1 | SUSE-SU-2025:02275-1 | Jul 10, 2025 |
| python3-libxml2 · RHEL 8 | 0:2.9.7-21.el8_10.1 | RHSA-2025:10698 | Jul 9, 2025 |
| python3-libxml2 · RHEL 9 | 0:2.9.13-10.el9_6 | RHSA-2025:10699 | Jul 9, 2025 |
| python3-libxml2 · Ubuntu 18.04.6 LTS (bionic) | 2.9.4+dfsg1-6.1ubuntu1.9+esm4 | python3-libxml2 2.9.4+dfsg1-6.1ubuntu1.9+esm4 | Jun 16, 2025 |
| python3-libxml2 · Ubuntu 20.04 LTS (focal) | 2.9.10+dfsg-5ubuntu0.20.04.10+esm1 | python3-libxml2 2.9.10+dfsg-5ubuntu0.20.04.10+esm1 | Jun 16, 2025 |
| python3-libxml2 · Ubuntu 22.04.1 LTS (jammy) | 2.9.13+dfsg-1ubuntu0.8 | python3-libxml2 2.9.13+dfsg-1ubuntu0.8 | Jun 16, 2025 |
| python3-libxml2 · Ubuntu 24.04.5 LTS (noble) | 2.9.14+dfsg-1.3ubuntu3.4 | python3-libxml2 2.9.14+dfsg-1.3ubuntu3.4 | Jun 16, 2025 |
| python3-libxml2 · Ubuntu 25.04 (plucky) | 2.12.7+dfsg+really2.9.14-0.4ubuntu0.2 | python3-libxml2 2.12.7+dfsg+really2.9.14-0.4ubuntu0.2 | Jan 16, 2026 |
| python3-libxml2 · almalinux 10 | 2.12.5-7.el10_0 | ALSA-2025:10630 | Jul 8, 2025 |
| python3-libxml2 · almalinux 8 | 2.9.7-21.el8_10.1 | ALSA-2025:10698 | Jul 9, 2025 |
| python3-libxml2 · almalinux 9 | 2.9.13-10.el9_6 | ALSA-2025:10699 | Jul 9, 2025 |
| python3-libxml2 · amzn 2023 | 2.10.4-1.amzn2023.0.11 | ALAS2023-2025-1019 | Jun 18, 2025 |
| python3-libxml2 · ol 10 | 0:2.12.5-7.el10_0 | ELSA-2025-10630 | Jul 8, 2025 |
| python3-libxml2 · ol 8 | 0:2.9.7-21.el8_10.1 | ELSA-2025-10698 | Jul 9, 2025 |
| python3-libxml2 · ol 9 | 0:2.9.13-10.el9_6 | ELSA-2025-10699 | Jul 9, 2025 |
| python3-libxml2-debuginfo · amzn 2023 | 2.10.4-1.amzn2023.0.11 | ALAS2023-2025-1019 | Jun 18, 2025 |
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