# RHSA-2026:95499: libX11 security update

RHSA-2026:95499, released September 21, 2026, fixes 1 CVE in libX11 (version 1.8.10-1.el10_0.1). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-95499
- Platform: Linux
- Released: Sep 21, 2026
- Priority: High (Closes CVE-2026-88806, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:95499

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libX11](https://patchblox.com/security/data/product/linux/libx11-libx11.md) | RHEL 10 | 1.8.10-1.el10_0.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-88806](https://patchblox.com/security/data/cve/CVE-2026-88806.md) | High | libX11 XkbGetMap Reply Heap-based Buffer Overflow | 7.5 | 0.0020 |  |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo