# CVE-2025-24855: libxslt1.1: numbers.c in libxslt before 1.1.43 has a use-after-free because, in nestedXPath evaluations, an XPath context node ca...

CVE-2025-24855 is fixed in 10 products on 1 platform, first by libxslt1.1 1.1.29-5ubuntu0.3+esm2, released March 13, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-24855
- Priority: High
- CVSS: 7.8 (Medium)
- EPSS: 0.0036
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 13, 2025

## Description

numbers.c in libxslt before 1.1.43 has a use-after-free because, in nestedXPath evaluations, an XPath context node can be modified but neverrestored. This is related to xsltNumberFormatGetValue,xsltEvalXPathPredicate, xsltEvalXPathStringNs, andxsltComputeSortResultInternal.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libxslt Debian 12.15 (bookworm) | 1.1.35-1+deb12u1 | [DEBIAN-CVE-2025-24855](https://patchblox.com/security/data/fix/linux/debian-cve-2025-24855.md) | Mar 14, 2025 |
| Linux | libxslt Debian 13.5 (trixie) | 1.1.35-1.2 | [DEBIAN-CVE-2025-24855](https://patchblox.com/security/data/fix/linux/debian-cve-2025-24855.md) | Mar 14, 2025 |
| Linux | libxslt Debian 14 | 1.1.35-1.2 | [DEBIAN-CVE-2025-24855](https://patchblox.com/security/data/fix/linux/debian-cve-2025-24855.md) | Mar 14, 2025 |
| Linux | libxslt RHEL 10 | 1.1.39-7.el10_0 | [RHSA-2025:7496](https://patchblox.com/security/data/fix/linux/rhsa-2025-7496.md) | Mar 14, 2025 |
| Linux | libxslt RHEL 8 | 0:1.1.32-6.1.el8_10 | [RHSA-2025:3615](https://patchblox.com/security/data/fix/linux/rhsa-2025-3615.md) | Apr 7, 2025 |
| Linux | libxslt RHEL 9 | 0:1.1.34-9.el9_5.1 | [RHSA-2025:3107](https://patchblox.com/security/data/fix/linux/rhsa-2025-3107.md) | Mar 24, 2025 |
| Linux | libxslt almalinux 10 | 1.1.39-7.el10_0 | [ALSA-2025:7496](https://patchblox.com/security/data/fix/linux/alsa-2025-7496.md) | May 13, 2025 |
| Linux | libxslt almalinux 8 | 1.1.32-6.1.el8_10 | [ALSA-2025:3615](https://patchblox.com/security/data/fix/linux/alsa-2025-3615.md) | Apr 7, 2025 |
| Linux | libxslt almalinux 9 | 1.1.34-9.el9_5.1 | [ALSA-2025:3107](https://patchblox.com/security/data/fix/linux/alsa-2025-3107.md) | Mar 24, 2025 |
| Linux | libxslt amzn 2023 | 1.1.43-1.amzn2023.0.1 | [ALAS2023-2025-909](https://patchblox.com/security/data/fix/linux/alas2023-2025-909.md) | Mar 26, 2025 |
| Linux | libxslt ol 10 | 0:1.1.39-7.el10_0 | [ELSA-2025-7496](https://patchblox.com/security/data/fix/linux/elsa-2025-7496.md) | Jun 26, 2025 |
| Linux | libxslt ol 8 | 0:1.1.32-6.1.0.1.el8_10 | [ELSA-2025-3615](https://patchblox.com/security/data/fix/linux/elsa-2025-3615.md) | Apr 7, 2025 |
| Linux | libxslt ol 9 | 0:1.1.34-9.0.1.el9_5.1 | [ELSA-2025-3107](https://patchblox.com/security/data/fix/linux/elsa-2025-3107.md) | Mar 24, 2025 |
| Linux | libxslt opensuse-leap 15.6 | 1.1.34-150400.3.6.1 | [SUSE-SU-2025:1125-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-1125-1.md) | Apr 3, 2025 |
| Linux | libxslt rocky 10 | 0:1.1.39-7.el10_0 | [RLSA-2025:7496](https://patchblox.com/security/data/fix/linux/rlsa-2025-7496.md) | Oct 3, 2025 |
| Linux | libxslt rocky 8 | 0:1.1.32-6.1.el8_10 | [RLSA-2025:3615](https://patchblox.com/security/data/fix/linux/rlsa-2025-3615.md) | Jul 29, 2025 |
| Linux | libxslt sles 15.6 | 1.1.34-150400.3.6.1 | [SUSE-SU-2025:1125-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-1125-1.md) | Apr 3, 2025 |
| Linux | libxslt-debuginfo amzn 2023 | 1.1.43-1.amzn2023.0.1 | [ALAS2023-2025-909](https://patchblox.com/security/data/fix/linux/alas2023-2025-909.md) | Mar 26, 2025 |
| Linux | libxslt-debugsource amzn 2023 | 1.1.43-1.amzn2023.0.1 | [ALAS2023-2025-909](https://patchblox.com/security/data/fix/linux/alas2023-2025-909.md) | Mar 26, 2025 |
| Linux | libxslt-devel RHEL 8 | 0:1.1.32-6.1.el8_10 | [RHSA-2025:3615](https://patchblox.com/security/data/fix/linux/rhsa-2025-3615.md) | Apr 7, 2025 |
| Linux | libxslt-devel RHEL 9 | 0:1.1.34-9.el9_5.1 | [RHSA-2025:3107](https://patchblox.com/security/data/fix/linux/rhsa-2025-3107.md) | Mar 24, 2025 |
| Linux | libxslt-devel almalinux 10 | 1.1.39-7.el10_0 | [ALSA-2025:7496](https://patchblox.com/security/data/fix/linux/alsa-2025-7496.md) | May 13, 2025 |
| Linux | libxslt-devel almalinux 8 | 1.1.32-6.1.el8_10 | [ALSA-2025:3615](https://patchblox.com/security/data/fix/linux/alsa-2025-3615.md) | Apr 7, 2025 |
| Linux | libxslt-devel almalinux 9 | 1.1.34-9.el9_5.1 | [ALSA-2025:3107](https://patchblox.com/security/data/fix/linux/alsa-2025-3107.md) | Mar 24, 2025 |
| Linux | libxslt-devel amzn 2023 | 1.1.43-1.amzn2023.0.1 | [ALAS2023-2025-909](https://patchblox.com/security/data/fix/linux/alas2023-2025-909.md) | Mar 26, 2025 |
| Linux | libxslt-devel ol 10 | 0:1.1.39-7.el10_0 | [ELSA-2025-7496](https://patchblox.com/security/data/fix/linux/elsa-2025-7496.md) | Jun 26, 2025 |
| Linux | libxslt-devel ol 8 | 0:1.1.32-6.1.0.1.el8_10 | [ELSA-2025-3615](https://patchblox.com/security/data/fix/linux/elsa-2025-3615.md) | Apr 7, 2025 |
| Linux | libxslt-devel ol 9 | 0:1.1.34-9.0.1.el9_5.1 | [ELSA-2025-3107](https://patchblox.com/security/data/fix/linux/elsa-2025-3107.md) | Mar 24, 2025 |
| Linux | libxslt-python opensuse-leap 15.6 | 1.1.32-150000.3.17.1 | [SUSE-SU-2025:1003-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-1003-1.md) | Mar 25, 2025 |
| Linux | libxslt1.1 Ubuntu 18.04.6 LTS (bionic) | 1.1.29-5ubuntu0.3+esm2 | [libxslt1.1 1.1.29-5ubuntu0.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libxslt1.1-1.1.29-5ubuntu0.3-esm2.md) | Mar 13, 2025 |
| Linux | libxslt1.1 Ubuntu 20.04 LTS (focal) | 1.1.34-4ubuntu0.20.04.3 | [libxslt1.1 1.1.34-4ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libxslt1.1-1.1.34-4ubuntu0.20.04.3.md) | Mar 13, 2025 |
| Linux | libxslt1.1 Ubuntu 22.04.1 LTS (jammy) | 1.1.34-4ubuntu0.22.04.3 | [libxslt1.1 1.1.34-4ubuntu0.22.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libxslt1.1-1.1.34-4ubuntu0.22.04.3.md) | Mar 13, 2025 |
| Linux | libxslt1.1 Ubuntu 24.04.5 LTS (noble) | 1.1.39-0exp1ubuntu0.24.04.2 | [libxslt1.1 1.1.39-0exp1ubuntu0.24.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libxslt1.1-1.1.39-0exp1ubuntu0.24.04.2.md) | Mar 13, 2025 |
| Linux | libxslt1.1 Ubuntu 24.10 (oracular) | 1.1.39-0exp1ubuntu1.2 | [libxslt1.1 1.1.39-0exp1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libxslt1.1-1.1.39-0exp1ubuntu1.2.md) | Jan 16, 2026 |
| Linux | libxslt1.1 Ubuntu 25.04 (plucky) | 1.1.39-0exp1ubuntu4 | [libxslt1.1 1.1.39-0exp1ubuntu4](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libxslt1.1-1.1.39-0exp1ubuntu4.md) | Jan 16, 2026 |
| Linux | python-libxslt1 Ubuntu 18.04.6 LTS (bionic) | 1.1.29-5ubuntu0.3+esm2 | [python-libxslt1 1.1.29-5ubuntu0.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-libxslt1-1.1.29-5ubuntu0.3-esm2.md) | Mar 13, 2025 |
| Linux | python3-libxslt amzn 2023 | 1.1.43-1.amzn2023.0.1 | [ALAS2023-2025-909](https://patchblox.com/security/data/fix/linux/alas2023-2025-909.md) | Mar 26, 2025 |
| Linux | python3-libxslt-debuginfo amzn 2023 | 1.1.43-1.amzn2023.0.1 | [ALAS2023-2025-909](https://patchblox.com/security/data/fix/linux/alas2023-2025-909.md) | Mar 26, 2025 |
| Linux | xsltproc Ubuntu 18.04.6 LTS (bionic) | 1.1.29-5ubuntu0.3+esm2 | [xsltproc 1.1.29-5ubuntu0.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xsltproc-1.1.29-5ubuntu0.3-esm2.md) | Mar 13, 2025 |
| Linux | xsltproc Ubuntu 20.04 LTS (focal) | 1.1.34-4ubuntu0.20.04.3 | [xsltproc 1.1.34-4ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xsltproc-1.1.34-4ubuntu0.20.04.3.md) | Mar 13, 2025 |
| Linux | xsltproc Ubuntu 22.04.1 LTS (jammy) | 1.1.34-4ubuntu0.22.04.3 | [xsltproc 1.1.34-4ubuntu0.22.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xsltproc-1.1.34-4ubuntu0.22.04.3.md) | Mar 13, 2025 |
| Linux | xsltproc Ubuntu 24.04.5 LTS (noble) | 1.1.39-0exp1ubuntu0.24.04.2 | [xsltproc 1.1.39-0exp1ubuntu0.24.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-xsltproc-1.1.39-0exp1ubuntu0.24.04.2.md) | Mar 13, 2025 |
| Linux | xsltproc Ubuntu 24.10 (oracular) | 1.1.39-0exp1ubuntu1.2 | [xsltproc 1.1.39-0exp1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-xsltproc-1.1.39-0exp1ubuntu1.2.md) | Jan 16, 2026 |
| Linux | xsltproc Ubuntu 25.04 (plucky) | 1.1.39-0exp1ubuntu4 | [xsltproc 1.1.39-0exp1ubuntu4](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-xsltproc-1.1.39-0exp1ubuntu4.md) | Jan 16, 2026 |

---

Data as of 2026-11-08T13:06:02Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.