# CVE-2026-6653: libxml2: The libxml2 library is a development toolbox providing the implementation of various XML standards.  Security Fix(es)...

CVE-2026-6653 is fixed in 8 products on 1 platform, first by DEBIAN-CVE-2026-6653, released June 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-6653
- Priority: High
- CVSS: 9.8 (Moderate)
- EPSS: 0.0036
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 21, 2026

## Description

The libxml2 library is a development toolbox providing the implementation of various XML standards.  Security Fix(es):  * libxml2: mingw-libxml2: libxml2: Denial of Service via crafted XML input due to use-after-free (CVE-2026-6653)  * libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow (CVE-2026-11979)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libxml2 Debian 14 | 2.14.5+dfsg-0.1 | [DEBIAN-CVE-2026-6653](https://patchblox.com/security/data/fix/linux/debian-cve-2026-6653.md) | Jun 24, 2026 |
| Linux | libxml2 RHEL 8 | 0:2.9.7-21.el8_10.8 | [RHSA-2026:69655](https://patchblox.com/security/data/fix/linux/rhsa-2026-69655.md) | Sep 22, 2026 |
| Linux | libxml2 RHEL 9 | 0:2.9.13-14.el9_8.4 | [RHSA-2026:61247](https://patchblox.com/security/data/fix/linux/rhsa-2026-61247.md) | Sep 13, 2026 |
| Linux | libxml2 Ubuntu 22.04.1 LTS (jammy) | 2.9.13+dfsg-1ubuntu0.12 | [libxml2 2.9.13+dfsg-1ubuntu0.12](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libxml2-2.9.13-dfsg-1ubuntu0.12.md) | Jun 25, 2026 |
| Linux | libxml2 Ubuntu 24.04.5 LTS (noble) | 2.9.14+dfsg-1.3ubuntu3.8 | [libxml2 2.9.14+dfsg-1.3ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libxml2-2.9.14-dfsg-1.3ubuntu3.8.md) | Jun 25, 2026 |
| Linux | libxml2 almalinux 8 | 2.9.7-21.el8_10.8 | [ALSA-2026:69655](https://patchblox.com/security/data/fix/linux/alsa-2026-69655.md) | Sep 21, 2026 |
| Linux | libxml2 almalinux 9 | 2.9.13-14.el9_8.4 | [ALSA-2026:61247](https://patchblox.com/security/data/fix/linux/alsa-2026-61247.md) | Aug 31, 2026 |
| Linux | libxml2 amzn 2023 | 2.10.4-1.amzn2023.0.19 | [ALAS2023-2026-1911](https://patchblox.com/security/data/fix/linux/alas2023-2026-1911.md) | Jul 6, 2026 |
| Linux | libxml2 ol 8 | 0:2.9.7-21.el8_10.8 | [ELSA-2026-69655](https://patchblox.com/security/data/fix/linux/elsa-2026-69655.md) | Sep 23, 2026 |
| Linux | libxml2 ol 9 | 0:2.9.13-14.el9_8.4 | [ELSA-2026-61247-0](https://patchblox.com/security/data/fix/linux/elsa-2026-61247-0.md) | Sep 1, 2026 |
| Linux | libxml2 rocky 8 | 0:2.9.7-21.el8_10.8 | [RLSA-2026:69655](https://patchblox.com/security/data/fix/linux/rlsa-2026-69655.md) | Sep 23, 2026 |
| Linux | libxml2 rocky 9 | 0:2.9.13-14.el9_8.4 | [RLSA-2026:61247](https://patchblox.com/security/data/fix/linux/rlsa-2026-61247.md) | Aug 31, 2026 |
| Linux | libxml2-debuginfo amzn 2023 | 2.10.4-1.amzn2023.0.19 | [ALAS2023-2026-1911](https://patchblox.com/security/data/fix/linux/alas2023-2026-1911.md) | Jul 6, 2026 |
| Linux | libxml2-debugsource amzn 2023 | 2.10.4-1.amzn2023.0.19 | [ALAS2023-2026-1911](https://patchblox.com/security/data/fix/linux/alas2023-2026-1911.md) | Jul 6, 2026 |
| Linux | libxml2-devel RHEL 8 | 0:2.9.7-21.el8_10.8 | [RHSA-2026:69655](https://patchblox.com/security/data/fix/linux/rhsa-2026-69655.md) | Sep 22, 2026 |
| Linux | libxml2-devel RHEL 9 | 0:2.9.13-14.el9_8.4 | [RHSA-2026:61247](https://patchblox.com/security/data/fix/linux/rhsa-2026-61247.md) | Sep 13, 2026 |
| Linux | libxml2-devel almalinux 8 | 2.9.7-21.el8_10.8 | [ALSA-2026:69655](https://patchblox.com/security/data/fix/linux/alsa-2026-69655.md) | Sep 21, 2026 |
| Linux | libxml2-devel almalinux 9 | 2.9.13-14.el9_8.4 | [ALSA-2026:61247](https://patchblox.com/security/data/fix/linux/alsa-2026-61247.md) | Aug 31, 2026 |
| Linux | libxml2-devel amzn 2023 | 2.10.4-1.amzn2023.0.19 | [ALAS2023-2026-1911](https://patchblox.com/security/data/fix/linux/alas2023-2026-1911.md) | Jul 6, 2026 |
| Linux | libxml2-devel ol 8 | 0:2.9.7-21.el8_10.8 | [ELSA-2026-69655](https://patchblox.com/security/data/fix/linux/elsa-2026-69655.md) | Sep 23, 2026 |
| Linux | libxml2-devel ol 9 | 0:2.9.13-14.el9_8.4 | [ELSA-2026-61247-0](https://patchblox.com/security/data/fix/linux/elsa-2026-61247-0.md) | Sep 1, 2026 |
| Linux | libxml2-static amzn 2023 | 2.10.4-1.amzn2023.0.19 | [ALAS2023-2026-1911](https://patchblox.com/security/data/fix/linux/alas2023-2026-1911.md) | Jul 6, 2026 |
| Linux | libxml2-utils Ubuntu 22.04.1 LTS (jammy) | 2.9.13+dfsg-1ubuntu0.12 | [libxml2-utils 2.9.13+dfsg-1ubuntu0.12](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libxml2-utils-2.9.13-dfsg-1ubuntu0.12.md) | Jun 25, 2026 |
| Linux | libxml2-utils Ubuntu 24.04.5 LTS (noble) | 2.9.14+dfsg-1.3ubuntu3.8 | [libxml2-utils 2.9.14+dfsg-1.3ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libxml2-utils-2.9.14-dfsg-1.3ubuntu3.8.md) | Jun 25, 2026 |
| Linux | python3-libxml2 RHEL 8 | 0:2.9.7-21.el8_10.8 | [RHSA-2026:69655](https://patchblox.com/security/data/fix/linux/rhsa-2026-69655.md) | Sep 22, 2026 |
| Linux | python3-libxml2 RHEL 9 | 0:2.9.13-14.el9_8.4 | [RHSA-2026:61247](https://patchblox.com/security/data/fix/linux/rhsa-2026-61247.md) | Sep 13, 2026 |
| Linux | python3-libxml2 Ubuntu 22.04.1 LTS (jammy) | 2.9.13+dfsg-1ubuntu0.12 | [python3-libxml2 2.9.13+dfsg-1ubuntu0.12](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-libxml2-2.9.13-dfsg-1ubuntu0.12.md) | Jun 25, 2026 |
| Linux | python3-libxml2 Ubuntu 24.04.5 LTS (noble) | 2.9.14+dfsg-1.3ubuntu3.8 | [python3-libxml2 2.9.14+dfsg-1.3ubuntu3.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-libxml2-2.9.14-dfsg-1.3ubuntu3.8.md) | Jun 25, 2026 |
| Linux | python3-libxml2 almalinux 8 | 2.9.7-21.el8_10.8 | [ALSA-2026:69655](https://patchblox.com/security/data/fix/linux/alsa-2026-69655.md) | Sep 21, 2026 |
| Linux | python3-libxml2 almalinux 9 | 2.9.13-14.el9_8.4 | [ALSA-2026:61247](https://patchblox.com/security/data/fix/linux/alsa-2026-61247.md) | Aug 31, 2026 |
| Linux | python3-libxml2 amzn 2023 | 2.10.4-1.amzn2023.0.19 | [ALAS2023-2026-1911](https://patchblox.com/security/data/fix/linux/alas2023-2026-1911.md) | Jul 6, 2026 |
| Linux | python3-libxml2 ol 8 | 0:2.9.7-21.el8_10.8 | [ELSA-2026-69655](https://patchblox.com/security/data/fix/linux/elsa-2026-69655.md) | Sep 23, 2026 |
| Linux | python3-libxml2 ol 9 | 0:2.9.13-14.el9_8.4 | [ELSA-2026-61247-0](https://patchblox.com/security/data/fix/linux/elsa-2026-61247-0.md) | Sep 1, 2026 |
| Linux | python3-libxml2-debuginfo amzn 2023 | 2.10.4-1.amzn2023.0.19 | [ALAS2023-2026-1911](https://patchblox.com/security/data/fix/linux/alas2023-2026-1911.md) | Jul 6, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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