# CVE-2026-32776: libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity content. CVE-2026-32776 is fixed in 7 products on 1 platform, first by DEBIAN-CVE-2026-32776, released March 16, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-32776 - Priority: Routine - CVSS: 5.5 (Moderate) - EPSS: 0.0017 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Mar 16, 2026 - Weakness: NULL Pointer Dereference - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32776 ## Description libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity content. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | MozillaFirefox opensuse-leap 16.0 | 153.5.0-160000.1.1 | [OPENSUSE-SU-2026:22139-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22139-1.md) | Nov 7, 2026 | | Linux | MozillaFirefox sles 15.6 | 153.5.0-150400.157.16.1 | [SUSE-SU-2026:4834-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4834-1.md) | Nov 7, 2026 | | Linux | MozillaFirefox sles 15.7 | 153.5.0-150400.157.16.1 | [SUSE-SU-2026:4834-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4834-1.md) | Nov 7, 2026 | | Linux | MozillaFirefox sles 16.0 | 153.5.0-160000.1.1 | [SUSE-SU-2026:24260-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24260-1.md) | Nov 7, 2026 | | Linux | MozillaThunderbird sles 15.7 | 153.5.0-150400.13.9.1 | [SUSE-SU-2026:4736-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4736-1.md) | Nov 7, 2026 | | Linux | expat Debian 12.15 (bookworm) | 2.5.0-1+deb12u4 | [DEBIAN-CVE-2026-32776](https://patchblox.com/security/data/fix/linux/debian-cve-2026-32776.md) | Mar 16, 2026 | | Linux | expat Debian 13.5 (trixie) | 2.8.2-1~deb13u1 | [DEBIAN-CVE-2026-32776](https://patchblox.com/security/data/fix/linux/debian-cve-2026-32776.md) | Mar 16, 2026 | | Linux | expat Debian 14 | 2.7.5-1 | [DEBIAN-CVE-2026-32776](https://patchblox.com/security/data/fix/linux/debian-cve-2026-32776.md) | Mar 16, 2026 | | Linux | expat Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.9+esm4 | [expat 2.2.5-3ubuntu0.9+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-expat-2.2.5-3ubuntu0.9-esm4.md) | Jun 21, 2026 | | Linux | expat Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.8+esm2 | [expat 2.2.9-1ubuntu0.8+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-expat-2.2.9-1ubuntu0.8-esm2.md) | Jun 21, 2026 | | Linux | expat Ubuntu 22.04.1 LTS (jammy) | 2.4.7-1ubuntu0.8 | [expat 2.4.7-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-expat-2.4.7-1ubuntu0.8.md) | Jun 21, 2026 | | Linux | expat Ubuntu 24.04.5 LTS (noble) | 2.6.1-2ubuntu0.5 | [expat 2.6.1-2ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-expat-2.6.1-2ubuntu0.5.md) | Jun 21, 2026 | | Linux | expat Ubuntu 26.04.1 LTS (resolute) | 2.7.4-1ubuntu0.1 | [expat 2.7.4-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-expat-2.7.4-1ubuntu0.1.md) | Jun 21, 2026 | | Linux | expat opensuse-leap 15.6 | 2.7.1-150400.3.37.1 | [SUSE-SU-2026:1166-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1166-1.md) | Apr 2, 2026 | | Linux | expat opensuse-leap 16.0 | 2.8.5-160000.1.1 | [OPENSUSE-SU-2026:22177-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22177-1.md) | Nov 7, 2026 | | Linux | expat sles 15.6 | 2.8.5-150400.3.40.1 | [SUSE-SU-2026:4623-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4623-1.md) | Nov 7, 2026 | | Linux | expat sles 15.7 | 2.8.5-150700.3.15.1 | [SUSE-SU-2026:4619-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4619-1.md) | Nov 7, 2026 | | Linux | expat sles 16.0 | 2.8.5-160000.1.1 | [SUSE-SU-2026:24469-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24469-1.md) | Nov 7, 2026 | | Linux | firefox amzn 2023 | 140.8.0-1.amzn2023.0.2 | [ALAS2023-2026-1518](https://patchblox.com/security/data/fix/linux/alas2023-2026-1518.md) | Mar 30, 2026 | | Linux | firefox-debuginfo amzn 2023 | 140.8.0-1.amzn2023.0.2 | [ALAS2023-2026-1518](https://patchblox.com/security/data/fix/linux/alas2023-2026-1518.md) | Mar 30, 2026 | | Linux | firefox-debugsource amzn 2023 | 140.8.0-1.amzn2023.0.2 | [ALAS2023-2026-1518](https://patchblox.com/security/data/fix/linux/alas2023-2026-1518.md) | Mar 30, 2026 | | Linux | libexpat1 Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.9+esm4 | [libexpat1 2.2.5-3ubuntu0.9+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libexpat1-2.2.5-3ubuntu0.9-esm4.md) | Jun 21, 2026 | | Linux | libexpat1 Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.8+esm2 | [libexpat1 2.2.9-1ubuntu0.8+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libexpat1-2.2.9-1ubuntu0.8-esm2.md) | Jun 21, 2026 | | Linux | libexpat1 Ubuntu 22.04.1 LTS (jammy) | 2.4.7-1ubuntu0.8 | [libexpat1 2.4.7-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libexpat1-2.4.7-1ubuntu0.8.md) | Jun 21, 2026 | | Linux | libexpat1 Ubuntu 24.04.5 LTS (noble) | 2.6.1-2ubuntu0.5 | [libexpat1 2.6.1-2ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libexpat1-2.6.1-2ubuntu0.5.md) | Jun 21, 2026 | | Linux | libexpat1 Ubuntu 26.04.1 LTS (resolute) | 2.7.4-1ubuntu0.1 | [libexpat1 2.7.4-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libexpat1-2.7.4-1ubuntu0.1.md) | Jun 21, 2026 | --- 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 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.