high7.8
CVE-2025-26599
An access to an uninitialized pointer flaw was found in X.Org and Xwayland.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Tigervnc | Tigervnc | All versions |
| X.Org | X Server | before 21.1.16 |
| X.Org | Xwayland | before 24.1.6 |
| Redhat | Enterprise Linux | Versions 7.0, 8.0, 9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://access.redhat.com/errata/RHSA-2025:2500
- https://access.redhat.com/errata/RHSA-2025:2502
- https://access.redhat.com/errata/RHSA-2025:2861
- https://access.redhat.com/errata/RHSA-2025:2862
- https://access.redhat.com/errata/RHSA-2025:2865
- https://access.redhat.com/errata/RHSA-2025:2866
- https://access.redhat.com/errata/RHSA-2025:2873
- https://access.redhat.com/errata/RHSA-2025:2874
- https://access.redhat.com/errata/RHSA-2025:2875
- https://access.redhat.com/errata/RHSA-2025:2879
- https://access.redhat.com/errata/RHSA-2025:2880
- https://access.redhat.com/errata/RHSA-2025:3976
- https://access.redhat.com/errata/RHSA-2025:7163
- https://access.redhat.com/errata/RHSA-2025:7165
- https://access.redhat.com/errata/RHSA-2025:7458
- https://access.redhat.com/security/cve/CVE-2025-26599
- https://bugzilla.redhat.com/show_bug.cgi?id=2345253
- https://lists.debian.org/debian-lts-announce/2025/02/msg00036.html