Description
A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected products
- RedHat / enterprise_linux7.0 – 7.0
- RedHat / enterprise_linux8.0 – 8.0
- RedHat / enterprise_linux9.0 – 9.0
- RedHat / enterprise_linux10.0 – 10.0
- X.Org / X server21.1.23
- X.Org / xwayland24.1.12
References
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:26562
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:26566
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:26590
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:26610
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:26709
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:28923
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:29844
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:36083
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:36085
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:36086
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:36087
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:36632
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:36633
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:36634
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:36768
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:36791
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:36792
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:36798
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:38502
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:38810
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:46377
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:46382
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:46385
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:46392
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:46456
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:46460
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:46473
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:49519
- VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2026-50263
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2485388
- MISChttps://gitlab.freedesktop.org/xorg/xserver/-/commit/ecc634f1b2f7aa473d3a267eada98c4918bf9e05
- MAILING_LISThttps://lists.x.org/archives/xorg-announce/2026-June/003702.html
- VENDOR_ADVISORYhttps://redhat.atlassian.net/browse/PSIRTSUPT-16950
Updated 38m ago · 8 sources