CVE-2025-26599: Xorg: xwayland: use of uninitialized pointer in compredirectwindow()
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.
Classification
CVE ID: CVE-2025-26599
Problem Types
Access of Uninitialized PointerAffected Products
Vendor: Red Hat, Red Hat, Red Hat, Red Hat, Red Hat, Red Hat, Red Hat, Red Hat, Red Hat, Red Hat
Product: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.02% (probability of being exploited)
EPSS Percentile: 3.54% (scored less or equal to compared to others)
EPSS Date: 2025-03-26 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-26599https://access.redhat.com/security/cve/CVE-2025-26599
https://bugzilla.redhat.com/show_bug.cgi?id=2345253