# CVE-2026-88807: libXrender RenderQueryPictFormats Reply Heap-based Buffer Overflow CVE-2026-88807 is fixed in 5 products on 1 platform, first by RHSA-2026:91003, released September 21, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-88807 - Priority: High - CVSS: 8.3 (Moderate) - EPSS: 0.0026 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 21, 2026 - Weakness: Heap-based Buffer Overflow - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88807 ## Description X.Org X11 libXrender runtime library Security Fix(es): * libXrender: libXrender: Code injection via heap overflow in RenderQueryPictFormats (CVE-2026-88807) 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 | libXrender RHEL 10 | 0.9.11-8.el10_2.1 | [RHSA-2026:91003](https://patchblox.com/security/data/fix/linux/rhsa-2026-91003.md) | Sep 21, 2026 | | Linux | libXrender RHEL 8 | 0:0.9.10-8.el8_10 | [RHSA-2026:91267](https://patchblox.com/security/data/fix/linux/rhsa-2026-91267.md) | Oct 29, 2026 | | Linux | libXrender RHEL 9 | 0:0.9.10-16.el9_8.2 | [RHSA-2026:91057](https://patchblox.com/security/data/fix/linux/rhsa-2026-91057.md) | Oct 30, 2026 | | Linux | libXrender almalinux 10 | 0.9.11-8.el10_2.1 | [ALSA-2026:91003](https://patchblox.com/security/data/fix/linux/alsa-2026-91003.md) | Nov 7, 2026 | | Linux | libXrender almalinux 8 | 0.9.10-8.el8_10 | [ALSA-2026:91267](https://patchblox.com/security/data/fix/linux/alsa-2026-91267.md) | Nov 7, 2026 | | Linux | libXrender almalinux 9 | 0.9.10-16.el9_8.2 | [ALSA-2026:91057](https://patchblox.com/security/data/fix/linux/alsa-2026-91057.md) | Nov 7, 2026 | | Linux | libXrender amzn 2023 | 0.9.11-6.amzn2023.0.2 | [ALAS2023-2026-3178](https://patchblox.com/security/data/fix/linux/alas2023-2026-3178.md) | Nov 7, 2026 | | Linux | libXrender ol 10 | 0:0.9.11-8.el10_2.1 | [ELSA-2026-91003](https://patchblox.com/security/data/fix/linux/elsa-2026-91003.md) | Nov 7, 2026 | | Linux | libXrender ol 8 | 0:0.9.10-8.el8_10 | [ELSA-2026-91267](https://patchblox.com/security/data/fix/linux/elsa-2026-91267.md) | Nov 7, 2026 | | Linux | libXrender ol 9 | 0:0.9.10-16.el9_8.2 | [ELSA-2026-91057](https://patchblox.com/security/data/fix/linux/elsa-2026-91057.md) | Nov 7, 2026 | | Linux | libXrender opensuse-leap 16.0 | 0.9.11-160000.3.1 | [OPENSUSE-SU-2026:21909-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21909-1.md) | Sep 22, 2026 | | Linux | libXrender rocky 10 | 0:0.9.11-8.el10_2.1 | [RLSA-2026:91003](https://patchblox.com/security/data/fix/linux/rlsa-2026-91003.md) | Nov 7, 2026 | | Linux | libXrender rocky 8 | 0:0.9.10-8.el8_10 | [RLSA-2026:91267](https://patchblox.com/security/data/fix/linux/rlsa-2026-91267.md) | Nov 7, 2026 | | Linux | libXrender rocky 9 | 0:0.9.10-16.el9_8.2 | [RLSA-2026:91057](https://patchblox.com/security/data/fix/linux/rlsa-2026-91057.md) | Nov 7, 2026 | | Linux | libXrender sles 15.6 | 0.9.10-150000.3.3.1 | [SUSE-SU-2026:4397-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4397-1.md) | Sep 29, 2026 | | Linux | libXrender sles 15.7 | 0.9.10-150000.3.3.1 | [SUSE-SU-2026:4397-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4397-1.md) | Sep 29, 2026 | | Linux | libXrender sles 16.0 | 0.9.11-160000.3.1 | [SUSE-SU-2026:23900-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23900-1.md) | Sep 22, 2026 | | Linux | libXrender-debuginfo amzn 2023 | 0.9.11-6.amzn2023.0.2 | [ALAS2023-2026-3178](https://patchblox.com/security/data/fix/linux/alas2023-2026-3178.md) | Nov 7, 2026 | | Linux | libXrender-debugsource amzn 2023 | 0.9.11-6.amzn2023.0.2 | [ALAS2023-2026-3178](https://patchblox.com/security/data/fix/linux/alas2023-2026-3178.md) | Nov 7, 2026 | | Linux | libXrender-devel RHEL 8 | 0:0.9.10-8.el8_10 | [RHSA-2026:91267](https://patchblox.com/security/data/fix/linux/rhsa-2026-91267.md) | Oct 29, 2026 | | Linux | libXrender-devel RHEL 9 | 0:0.9.10-16.el9_8.2 | [RHSA-2026:91057](https://patchblox.com/security/data/fix/linux/rhsa-2026-91057.md) | Oct 30, 2026 | | Linux | libXrender-devel almalinux 10 | 0.9.11-8.el10_2.1 | [ALSA-2026:91003](https://patchblox.com/security/data/fix/linux/alsa-2026-91003.md) | Nov 7, 2026 | | Linux | libXrender-devel almalinux 8 | 0.9.10-8.el8_10 | [ALSA-2026:91267](https://patchblox.com/security/data/fix/linux/alsa-2026-91267.md) | Nov 7, 2026 | | Linux | libXrender-devel almalinux 9 | 0.9.10-16.el9_8.2 | [ALSA-2026:91057](https://patchblox.com/security/data/fix/linux/alsa-2026-91057.md) | Nov 7, 2026 | | Linux | libXrender-devel amzn 2023 | 0.9.11-6.amzn2023.0.2 | [ALAS2023-2026-3178](https://patchblox.com/security/data/fix/linux/alas2023-2026-3178.md) | Nov 7, 2026 | | Linux | libXrender-devel ol 10 | 0:0.9.11-8.el10_2.1 | [ELSA-2026-91003](https://patchblox.com/security/data/fix/linux/elsa-2026-91003.md) | Nov 7, 2026 | | Linux | libXrender-devel ol 8 | 0:0.9.10-8.el8_10 | [ELSA-2026-91267](https://patchblox.com/security/data/fix/linux/elsa-2026-91267.md) | Nov 7, 2026 | | Linux | libXrender-devel ol 9 | 0:0.9.10-16.el9_8.2 | [ELSA-2026-91057](https://patchblox.com/security/data/fix/linux/elsa-2026-91057.md) | Nov 7, 2026 | | Linux | libxrender Debian 14 | 1:0.9.13-1 | [DEBIAN-CVE-2026-88807](https://patchblox.com/security/data/fix/linux/debian-cve-2026-88807.md) | Sep 21, 2026 | --- Data as of 2026-11-08T06:59:42Z UTC. 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