CVE-2025-26599
HIGH severity · CVSS 7.8 · CWE-824
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://access.redhat.com/errata/RHSA-2025:2500Advisory
- https://access.redhat.com/errata/RHSA-2025:2502Advisory
- https://access.redhat.com/errata/RHSA-2025:2861Advisory
- https://access.redhat.com/errata/RHSA-2025:2862Advisory
- https://access.redhat.com/errata/RHSA-2025:2865Advisory
- https://access.redhat.com/errata/RHSA-2025:2866Advisory
- https://access.redhat.com/errata/RHSA-2025:2873Advisory
- https://access.redhat.com/errata/RHSA-2025:2874Advisory