VulnerabilityModified
CVE-2026-50263
A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow().
MEDIUM 5.5EPSS 0.14%
Does this matter?
Lower severity and a low EPSS score (0.14%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.14% probability · 4th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- x.org/x server · x.org/xwayland · redhat/enterprise linux
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2026:26562
- https://access.redhat.com/errata/RHSA-2026:26566
- https://access.redhat.com/errata/RHSA-2026:26590
- https://access.redhat.com/errata/RHSA-2026:26610
- https://access.redhat.com/errata/RHSA-2026:26709
- https://access.redhat.com/errata/RHSA-2026:28923
- https://access.redhat.com/errata/RHSA-2026:29844
- https://access.redhat.com/errata/RHSA-2026:36083
- https://access.redhat.com/errata/RHSA-2026:36085
- https://access.redhat.com/errata/RHSA-2026:36086
- https://access.redhat.com/errata/RHSA-2026:36087
- https://access.redhat.com/errata/RHSA-2026:36632
- https://access.redhat.com/errata/RHSA-2026:36633
- https://access.redhat.com/errata/RHSA-2026:36634
- https://access.redhat.com/errata/RHSA-2026:36768
- https://access.redhat.com/errata/RHSA-2026:36791
- https://access.redhat.com/errata/RHSA-2026:36792
- https://access.redhat.com/errata/RHSA-2026:36798
- https://access.redhat.com/errata/RHSA-2026:38502
- https://access.redhat.com/errata/RHSA-2026:38810
- https://access.redhat.com/errata/RHSA-2026:46377
- https://access.redhat.com/errata/RHSA-2026:46382
- https://access.redhat.com/errata/RHSA-2026:46385
- https://access.redhat.com/errata/RHSA-2026:46392
- https://access.redhat.com/errata/RHSA-2026:46456
- https://access.redhat.com/errata/RHSA-2026:46460
- https://access.redhat.com/errata/RHSA-2026:46473
- https://access.redhat.com/errata/RHSA-2026:49519
- https://access.redhat.com/security/cve/CVE-2026-50263Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2485388Issue Tracking, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.