The remote Redhat Enterprise Linux 8 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:53450 advisory.

    Xwayland is an X server for running X clients under Wayland.

    Security Fix(es):

    * xorg: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow (CVE-2026-55999)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

The version of Tencent Linux installed on the remote TencentOS Server 2 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0834 advisory.

    Package updates are available for TencentOS Server 2 that fix the following vulnerabilities:

    CVE-2026-55999:
    Local attackers with a X connection able to provide PCX fonts to the X     server xorg-server before 21.2.24 and xwayland before 24.1.13 could     cause a heap buffer overflow via SetFont due to missing glyph boundary checks.

Tenable has extracted the preceding description block directly from the Tencent 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.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:50718 advisory.

    Xwayland is an X server for running X clients under Wayland.

    Security Fix(es):

    * xorg: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow (CVE-2026-55999)

    * X.org: xorg-x11-server: GLX contextTags Use-After-Free in CommonMakeCurrent() (CVE-2026-56000)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 Redhat Enterprise Linux 8 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:52392 advisory.

    Xwayland is an X server for running X clients under Wayland.

    Security Fix(es):

    * xorg: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow (CVE-2026-55999)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:52397 advisory.

    Xwayland is an X server for running X clients under Wayland.

    Security Fix(es):

    * xorg: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow (CVE-2026-55999)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
334547	RHEL 8 : xorg-x11-server-Xwayland (RHSA-2026:53450)	Nessus	Red Hat Local Security Checks	2026/8/11	2026/8/11	high
334819	TencentOS Server 2: xorg-x11-server (TSSA-2026:0834)	Nessus	Tencent Local Security Checks	2026/8/12	2026/8/12	high
332711	RHEL 9 : xorg-x11-server-Xwayland (RHSA-2026:50718)	Nessus	Red Hat Local Security Checks	2026/8/5	2026/8/5	critical
333577	RHEL 8 : xorg-x11-server-Xwayland (RHSA-2026:52392)	Nessus	Red Hat Local Security Checks	2026/8/10	2026/8/10	high
333578	RHEL 9 : xorg-x11-server-Xwayland (RHSA-2026:52397)	Nessus	Red Hat Local Security Checks	2026/8/10	2026/8/10	high

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