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.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- RedHat / enterprise_linux7.0 – 7.0
- RedHat / enterprise_linux8.0 – 8.0
- RedHat / enterprise_linux9.0 – 9.0
- TigerVNC / TigerVNC
- X.Org / X server21.1.16
- X.Org / xwayland24.1.6
References
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2500
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2502
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2861
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2862
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2865
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2866
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2873
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2874
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2875
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2879
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:2880
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:3976
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:7163
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:7165
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:7458
- VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2025-26599
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2345253
Updated 31m ago · 8 sources