The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_89747 advisory.

    * xorg-x11-server: xorg-x11-server: Arbitrary code execution via use-after-free in passive grab handling     (CVE-2026-93516)

    * xorg-x11-server: xorg-x11-server: Privilege escalation via crafted RandR provider property requests     (CVE-2026-93521)

    * xorg-x11-server: xwayland: xorg-x11-server: Arbitrary code execution via double-free in XKB geometry     handling (CVE-2026-88812)

    * xorg-x11-server: xorg-x11-server: Out-of-bounds write via unvalidated modifier in     ProcXIPassiveUngrabDevice (CVE-2026-93523)

    * xorg-x11-server: xorg-x11-server: arbitrary code execution via GLX RenderLarge heap-based buffer     overflow (CVE-2026-93517)

    * xorg-x11-server: xorg-x11-server: arbitrary code execution via integer truncation during keyboard     mapping resize (CVE-2026-93518)

    * xorg-x11-server: xorg-x11-server: Arbitrary code execution via buffer overflow in     input_constrain_cursor() (CVE-2026-93519)

    * xorg-x11-server: xorg-x11-server: arbitrary code execution via out-of-bounds write in XKB keycode     handling (CVE-2026-93520)

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

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Rocky Linux 8 [CIQ] Security Update: xorg-x11-server-Xdmx / xorg-x11-server-Xdmx-debuginfo / etc Multiple Vulnerabilities (crlsa-2026_89747)

high Nessus Plugin ID 372950

Version 1.2