Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2025-62231: The XkbCompatMap structure stores some of its values using an unsigned short, but fails to check whether the sum of the input data might overflow the maximum unsigned short value Introduced in: X11R6 Fixed in: xorg-server-21.1.19 and xwayland-24.1.9 Fix: https://gitlab.freedesktop.org/xorg/xserver/-/commit/475d9f49 NOTE: https://lists.x.org/archives/xorg-announce/2025-October/003635.html NOTE: Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/475d9f49acd0e55bc0b089ed77f732ad18585470 NOTE: Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/3baad99f9c15028ed8c3e3d8408e5ec35db155aa (xorg-server-21.1.19) CVE-2025-62230: When removing the Xkb resources for a client, the function XkbRemoveResourceClient() will free the XkbInterest data associated with the device, but not the resource associated with it. As a result, when the client terminates, the resource delete function triggers a use-after-free. NOTE: https://lists.x.org/archives/xorg-announce/2025-October/003635.html NOTE: Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/99790a2c9205a52fbbec01f21a92c9b7f4ed1d8f NOTE: Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/10c94238bdad17c11707e0bdaaa3a9cd54c504be NOTE: Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/865089ca70840c0f13a61df135f7b44a9782a175 (xorg-server-21.1.19) NOTE: Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/87fe2553937a99fd914ad0cde999376a3adc3839 (xorg-server-21.1.19) CVE-2025-62229: A flaw was found in the X.Org X server and Xwayland when processing X11 Present extension notifications. Improper error handling during notification creation can leave dangling pointers that lead to a use-after-free condition. This can cause memory corruption or a crash, potentially allowing an attacker to execute arbitrary code or cause a denial of service.
Fixed packages 8
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | tigervnc | 0:1.8.0-24.amzn2.0.7 |
| Amazon Linux · 2 | tigervnc-debuginfo | 0:1.8.0-24.amzn2.0.7 |
| Amazon Linux · 2 | tigervnc-icons | 0:1.8.0-24.amzn2.0.7 |
| Amazon Linux · 2 | tigervnc-license | 0:1.8.0-24.amzn2.0.7 |
| Amazon Linux · 2 | tigervnc-server | 0:1.8.0-24.amzn2.0.7 |
| Amazon Linux · 2 | tigervnc-server-applet | 0:1.8.0-24.amzn2.0.7 |
| Amazon Linux · 2 | tigervnc-server-minimal | 0:1.8.0-24.amzn2.0.7 |
| Amazon Linux · 2 | tigervnc-server-module | 0:1.8.0-24.amzn2.0.7 |
Vulnerabilities 3
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High 7.3
Xorg: xmayland: use-after-free in xpresentnotify structure creation
A flaw was found in the X.Org X server and Xwayland when processing X11 Present extension notifications. Improper error handling during notification creation can leave dangling pointers that lead to a use-after-free condition. This can cause memory corruption…
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High 7.3
Xorg: xwayland: use-after-free in xkb client resource removal
A flaw was discovered in the X.Org X server’s X Keyboard (Xkb) extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memo…
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High 7.3
Xorg: xmayland: value overflow in xkbsetcompatmap()
A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overfl…