CVE-2025-26599 – X.Org and Xwayland Uninitialized Pointer Access Vulnerability

The following table lists the changes that have been made to the
CVE-2025-26599 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Feb. 25, 2025

    Action Type Old Value New Value
    Added Description An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect() may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow() will return a BadAlloc error without validating the window tree marked just before, which leaves the validated data partly initialized and the use of an uninitialized pointer later.
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-824
    Added Reference https://access.redhat.com/security/cve/CVE-2025-26599
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2345253
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