The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:21716 advisory.

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

    Security Fix(es):

    * xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map     handling (CVE-2026-33999)

    * xwayland: xorg: X.Org X server: Information disclosure and denial of service via out-of-bounds read in     XKB geometry processing. (CVE-2026-34000)

    * xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory     corruption (CVE-2026-34001)

    * xorg: xwayland: X.Org X server: Information disclosure or Denial of Service via out-of-bounds read in     XKB modifier map handling (CVE-2026-34002)

    * xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory     access (CVE-2026-34003)

    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 multiple vulnerabilities as referenced in the RHSA-2026:21712 advisory.

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

    Security Fix(es):

    * xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map     handling (CVE-2026-33999)

    * xwayland: xorg: X.Org X server: Information disclosure and denial of service via out-of-bounds read in     XKB geometry processing. (CVE-2026-34000)

    * xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory     corruption (CVE-2026-34001)

    * xorg: xwayland: X.Org X server: Information disclosure or Denial of Service via out-of-bounds read in     XKB modifier map handling (CVE-2026-34002)

    * xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory     access (CVE-2026-34003)

    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 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:22456 advisory.

    Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop     environment not only on the machine where it is running, but from anywhere on the Internet and from a wide     variety of machine architectures. TigerVNC is a suite of VNC servers and clients.

    Security Fix(es):

    * xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map     handling (CVE-2026-33999)

    * xwayland: xorg: X.Org X server: Information disclosure and denial of service via out-of-bounds read in     XKB geometry processing. (CVE-2026-34000)

    * xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory     corruption (CVE-2026-34001)

    * xorg: xwayland: X.Org X server: Information disclosure or Denial of Service via out-of-bounds read in     XKB modifier map handling (CVE-2026-34002)

    * xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory     access (CVE-2026-34003)

    * TigerVNC: x0vncserver: TigerVNC x0vncserver: Information disclosure, data manipulation, and denial of     service via incorrect permissions (CVE-2026-34352)

    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 version of Tencent Linux installed on the remote TencentOS Server 2 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0568 advisory.

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

    CVE-2026-33999:
    A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB     compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer     read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other     severe impacts.

    CVE-2026-34000:
    A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry     processing, specifically within the CheckSetGeom() and XkbAddGeomKeyAlias functions, allows an attacker to     read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server, either     locally or remotely, can exploit this without user interaction. This could lead to the disclosure of     memory contents or cause a denial of service by crashing the server.

    CVE-2026-34001:
    A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence     triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the     X11 server can exploit this without user interaction, leading to a server crash and potentially enabling     memory corruption. This could result in a denial of service or further compromise of the system.

    CVE-2026-34002:
    A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X     Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by     sending a malformed request, which causes the server to read beyond its intended memory boundaries. This     can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of     service.

    CVE-2026-34003:
    A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a     specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This     could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial     of Service (DoS). In certain configurations, higher impact outcomes may be possible.

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

According to the versions of the xorg-x11-server packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry     processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an     attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server,     either locally or remotely, can exploit this without user interaction. This could lead to the disclosure     of memory contents or cause a denial of service by crashing the server.(CVE-2026-34000)

    A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a     specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This     could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial     of Service (DoS). In certain configurations, higher impact outcomes may be possible.(CVE-2026-34003)

    A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X     Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by     sending a malformed request, which causes the server to read beyond its intended memory boundaries. This     can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of     service.(CVE-2026-34002)

    A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB     compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer     read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other     severe impacts.(CVE-2026-33999)

    A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence     triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the     X11 server can exploit this without user interaction, leading to a server crash and potentially enabling     memory corruption. This could result in a denial of service or further compromise of the     system.(CVE-2026-34001)

Tenable has extracted the preceding description block directly from the EulerOS xorg-x11-server security advisory.

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

According to the versions of the xorg-x11-server packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X     Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by     sending a malformed request, which causes the server to read beyond its intended memory boundaries. This     can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of     service.(CVE-2026-34002)

    A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a     specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This     could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial     of Service (DoS). In certain configurations, higher impact outcomes may be possible.(CVE-2026-34003)

    A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB     compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer     read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other     severe impacts.(CVE-2026-33999)

    A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry     processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an     attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server,     either locally or remotely, can exploit this without user interaction. This could lead to the disclosure     of memory contents or cause a denial of service by crashing the server.(CVE-2026-34000)

    A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence     triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the     X11 server can exploit this without user interaction, leading to a server crash and potentially enabling     memory corruption. This could result in a denial of service or further compromise of the     system.(CVE-2026-34001)

Tenable has extracted the preceding description block directly from the EulerOS xorg-x11-server security advisory.

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

According to the versions of the xorg-x11-server packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence     triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the     X11 server can exploit this without user interaction, leading to a server crash and potentially enabling     memory corruption. This could result in a denial of service or further compromise of the     system.(CVE-2026-34001)

    A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB     compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer     read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other     severe impacts.(CVE-2026-33999)

    A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X     Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by     sending a malformed request, which causes the server to read beyond its intended memory boundaries. This     can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of     service.(CVE-2026-34002)

    A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a     specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This     could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial     of Service (DoS). In certain configurations, higher impact outcomes may be possible.(CVE-2026-34003)

    A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry     processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an     attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server,     either locally or remotely, can exploit this without user interaction. This could lead to the disclosure     of memory contents or cause a denial of service by crashing the server.(CVE-2026-34000)

Tenable has extracted the preceding description block directly from the EulerOS xorg-x11-server security advisory.

Note that Nessus has not tested for these issues 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
317460	RHEL 8 : xorg-x11-server-Xwayland (RHSA-2026:21716)	Nessus	Red Hat Local Security Checks	2026/5/28	2026/5/28	critical
317464	RHEL 8 : xorg-x11-server-Xwayland (RHSA-2026:21712)	Nessus	Red Hat Local Security Checks	2026/5/28	2026/5/28	critical
319560	RHEL 7 : tigervnc (RHSA-2026:22456)	Nessus	Red Hat Local Security Checks	2026/6/6	2026/6/6	critical
323697	TencentOS Server 2: xorg-x11-server (TSSA-2026:0568)	Nessus	Tencent Local Security Checks	2026/6/29	2026/6/29	critical
326144	EulerOS 2.0 SP12 : xorg-x11-server (EulerOS-SA-2026-2637)	Nessus	Huawei Local Security Checks	2026/7/10	2026/7/10	critical
332790	EulerOS 2.0 SP15 : xorg-x11-server (EulerOS-SA-2026-2915)	Nessus	Huawei Local Security Checks	2026/8/6	2026/8/6	critical
332815	EulerOS 2.0 SP13 : xorg-x11-server (EulerOS-SA-2026-3056)	Nessus	Huawei Local Security Checks	2026/8/6	2026/8/6	critical

检测

插件搜索

critical

critical

critical

critical

critical

critical

critical