The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2021-2100:01 advisory.

    * xorg-x11-server: Out-of-bounds access in XkbSetNames function (CVE-2020-14345)
      * xorg-x11-server: Integer underflow in the X input extension protocol (CVE-2020-14346)
      * xorg-x11-server: Out-of-bounds access in XkbSetMap function (CVE-2020-14360)
      * xorg-x11-server: XkbSelectEvents integer underflow privilege escalation vulnerability (CVE-2020-14361)
      * xorg-x11-server: XRecordRegisterClients integer underflow privilege escalation vulnerability     (CVE-2020-14362)
      * libX11: Integer overflow leads to double free in locale handling (CVE-2020-14363)
      * xorg-x11-server: XkbSetDeviceInfo heap-based buffer overflow privilege escalation vulnerability     (CVE-2020-25712)
      * libX11: Heap overflow in the X input method client (CVE-2020-14344)
      * xorg-x11-server: Leak of uninitialized heap memory from the X server to clients in AllocatePixmap of     dix/pixmap.c (CVE-2020-14347)

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

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

The remote MiracleLinux 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2021-1136:01 advisory.

    xorg-x11-server: Out-of-bounds access in XkbSetMap function (CVE-2020-14360)         xorg-x11-server: XkbSetDeviceInfo heap-based buffer overflow privilege     escalation vulnerability (CVE-2020-25712)         xorg-x11-server: Leak of uninitialized heap memory from the X server to     clients in AllocatePixmap of dix/pixmap.c (CVE-2020-14347)

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

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

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005929 advisory.

    A flaw was found in the way xserver memory was not properly initialized. This could leak parts of server     memory to the X client. In cases where Xorg server runs with elevated privileges, this could result in     possible ASLR bypass. Xorg-server before version 1.20.9 is vulnerable.

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

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

This update for xorg-x11-server fixes the following issues :

CVE-2020-14347: Leak of uninitialized heap memory from the X server to clients on pixmap allocation (bsc#1174633, ZDI-CAN-11426).

CVE-2020-14346: XIChangeHierarchy Integer Underflow Privilege Escalation Vulnerability (bsc#1174638, ZDI-CAN-11429).

CVE-2020-14345: XKB out-of-bounds access privilege escalation vulnerability (bsc#1174635, ZDI-CAN-11428).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several vulnerabilities have been discovered in the X.Org X server.
Missing input sanitising in X server extensions may result in local privilege escalation if the X server is configured to run with root privileges. In addition an ASLR bypass was fixed.

ID	Name	Product	Family	Published	Updated	Severity
294354	MiracleLinux 8 : userspace graphics, xorg-x11, and mesa, xorg-x11-server-1.20.10-1.el8 (AXSA:2021-2100:01)	Nessus	Miracle Linux Local Security Checks	1/20/2026	1/20/2026	high
294725	MiracleLinux 4 : xorg-x11-server-1.17.4-18.0.2.AXS4 (AXSA:2021-1136:01)	Nessus	Miracle Linux Local Security Checks	1/20/2026	1/20/2026	high
301524	Unity Linux 20.1070e Security Update: xorg-x11-server (UTSA-2026-005929)	Nessus	Unity Linux Local Security Checks	3/9/2026	3/9/2026	medium
139836	SUSE SLED15 / SLES15 Security Update : xorg-x11-server (SUSE-SU-2020:2241-1)	Nessus	SuSE Local Security Checks	8/26/2020	1/13/2021	high
139847	SUSE SLES15 Security Update : xorg-x11-server (SUSE-SU-2020:2326-1)	Nessus	SuSE Local Security Checks	8/26/2020	9/17/2020	high
140299	Debian DSA-4758-1 : xorg-server - security update	Nessus	Debian Local Security Checks	9/8/2020	9/17/2020	high

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