CVE-2025-62229High· 7.3▾ TwilightA 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 c…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 40.2 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.5%
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.
xwayland >= 1.15.0 < 24.1.9xorg-x11-server-Xwayland (all versions)xorg-x11-server-Xwayland (all versions)tigervnc (all versions)xorg-x11-server (all versions)tigervnc (all versions)xorg-x11-server-Xwayland (all versions)xorg-x11-server (all versions)tigervnc (all versions)tigervnc (all versions)xorg-x11-server (all versions)tigervnc (all versions)xorg-x11-server (all versions)tigervnc (all versions)xorg-x11-server (all versions)tigervnc (all versions)xorg-x11-server (all versions)xorg-x11-server-Xwayland (all versions)tigervnc (all versions)xorg-x11-server (all versions)xorg-x11-server-Xwayland (all versions)tigervnc (all versions)xorg-x11-server (all versions)xorg-x11-server-Xwayland (all versions)tigervnc (all versions)xorg-x11-server (all versions)xorg-x11-server-Xwayland (all versions)tigervnc (all versions)xorg-x11-server (all versions)xorg-x11-server-Xwayland (all versions)xorg-x11-server (all versions)tigervnc (all versions)xorg-x11-server-Xwayland (all versions)tigervnc (all versions)xorg-x11-server-Xwayland (all versions)xorg-x11-server (all versions)tigervnc (all versions)xorg-x11-server (all versions)xorg-x11-server-Xwayland (all versions)tigervnc (all versions)xorg-x11-server (all versions)xorg-x11-server-Xwayland (all versions)tigervnc (all versions)xorg-x11-server (all versions)xorg-x11-server-Xwayland (all versions)xorg-x11-serverRefer to the linked advisories for vendor-supplied fixes and affected version ranges.
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Connected by shared product, vendor, weakness, or advisory.
CVE-2025-62230High· 7.3A flaw was discovered in the X.Org X server’s X Keyboard (Xkb) extension when handling client resource cleanup
CVE-2025-62231High· 7.3A 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
CVE-2026-93515Medium· 6.8.Org Server Present Extension Use-After-Free
CVE-2026-93516Medium· 5.5.Org Server XInput Passive Grab Use-After-Free
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