# RHSA-2026:38488: xorg-x11-server-Xwayland security update

RHSA-2026:38488, released July 13, 2026, fixes 1 CVE in xorg-x11-server-Xwayland (version 0:21.1.3-20.el8_10.3). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-38488
- Platform: Linux
- Released: Jul 13, 2026
- Priority: High (Closes CVE-2026-55999, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:38488

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [xorg-x11-server-Xwayland](https://patchblox.com/security/data/product/linux/xorg-x11-server-xwayland.md) | RHEL 8 | 0:21.1.3-20.el8_10.3 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-55999](https://patchblox.com/security/data/cve/CVE-2026-55999.md) | High | xorg-x11-server-Xwayland: Local attackers with a X connection able to provide PCX fonts to the X  server xorg-server before 21.2.24 and xwaylan... | 7.8 | 0.0033 |  |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo