Threat Intelligence Database

Multiple security vulnerabilities have been identified in the X.Org server component of Red Hat Enterprise Linux 7. These include heap buffer overread and data leakage issues in the ProcXIGetSelectedEvents and ProcXIPassiveGrabDevice functions, as well as a user-after-free vulnerability in ProcRenderAddGlyphs. These flaws could potentially lead to information disclosure or memory corruption. Red Hat has issued an important security advisory and released updated packages to address these issues.

Multiple security vulnerabilities have been identified in the xorg-x11-server component used by TigerVNC in Red Hat Enterprise Linux 7. These include heap buffer overread and data leakage issues (CVE-2024-31080 and CVE-2024-31081) and a user-after-free vulnerability (CVE-2024-31083). These flaws could potentially lead to information disclosure or memory corruption. Red Hat has issued an important security advisory with updates to address these issues for various Red Hat Enterprise Linux 7 variants.

Red Hat has issued a security update for the xorg-x11-server component in Red Hat Enterprise Linux 9 to address three vulnerabilities: two heap buffer overread/data leakage issues (CVE-2024-31080 and CVE-2024-31081) and one use-after-free vulnerability (CVE-2024-31083). These vulnerabilities affect the X.Org implementation of the X Window System, which provides foundational graphical interface functionality. The update is rated with moderate security impact and is included in Red Hat Enterprise Linux 9.5 and related Extended Update Support and Extended Life Cycle releases.

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Security Fix(es): * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Out-of-Bounds Read in X Rendering Extension Animated Cursors (CVE-2025-49175) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer Overflow in Big Requests Extension (CVE-2025-49176) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Unprocessed Client Request Due to Bytes to Ignore (CVE-2025-49178) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer overflow in X Record extension (CVE-2025-49179) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer Overflow in X Resize, Rotate and Reflect (RandR) Extension (CVE-2025-49180) 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.

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: xmayland: Use-after-free in XPresentNotify structure creation (CVE-2025-62229) * xorg: xwayland: Use-after-free in Xkb client resource removal (CVE-2025-62230) * xorg: xmayland: Value overflow in XkbSetCompatMap() (CVE-2025-62231) 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.

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Security Fix(es): * xorg: xmayland: Use-after-free in XPresentNotify structure creation (CVE-2025-62229) * xorg: xwayland: Use-after-free in Xkb client resource removal (CVE-2025-62230) * xorg: xmayland: Value overflow in XkbSetCompatMap() (CVE-2025-62231) 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.

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Security Fix(es): * xorg: xmayland: Use-after-free in XPresentNotify structure creation (CVE-2025-62229) * xorg: xwayland: Use-after-free in Xkb client resource removal (CVE-2025-62230) * xorg: xmayland: Value overflow in XkbSetCompatMap() (CVE-2025-62231) 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.

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Security Fix(es): * xorg: xmayland: Use-after-free in XPresentNotify structure creation (CVE-2025-62229) * xorg: xwayland: Use-after-free in Xkb client resource removal (CVE-2025-62230) * xorg: xmayland: Value overflow in XkbSetCompatMap() (CVE-2025-62231) 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.

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Security Fix(es): * xorg-x11-server: tigervnc: heap-based buffer overflow privilege escalation vulnerability (CVE-2024-9632) * X.Org: Xwayland: Use-after-free of the root cursor (CVE-2025-26594) * xorg: xwayland: Use-after-free in SyncInitTrigger() (CVE-2025-26601) * xorg: xwayland: Use-after-free in PlayReleasedEvents() (CVE-2025-26600) * xorg: xwayland: Use of uninitialized pointer in compRedirectWindow() (CVE-2025-26599) * xorg: xwayland: Out-of-bounds write in CreatePointerBarrierClient() (CVE-2025-26598) * xorg: xwayland: Buffer overflow in XkbChangeTypesOfKey() (CVE-2025-26597) * xorg: xwayland: Heap overflow in XkbWriteKeySyms() (CVE-2025-26596) * Xorg: xwayland: Buffer overflow in XkbVModMaskText() (CVE-2025-26595) 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. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 9 Release Notes linked from the References section.