MEDIUM CWE-416
CVE-2026-50263
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()
Red Hat·Enterprise Linux 10
5.5/ 10
CVSS 3.1
Medium severity
0.14%
EPSS exploit odds
Chance of exploitation in the next 30 days
Higher than 3% of all CVEs
Not listed
CISA KEV catalog
No confirmed in-the-wild exploitation on CISA's list.
Timeline
- Published
- Jun 5, 2026
- Updated
- Nov 5, 2026
- First covered
- Jun 30, 2026
- Latest story
- 5 months ago
Summary
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.
CWE-416Use After Free
Attack profile
Attack vectorLocal
ComplexityLow
PrivilegesLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NAffected products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
- Red Hat Enterprise Linux 7 Extended Lifecycle Support
- Red Hat Enterprise Linux 7 Extended Lifecycle Support
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 8
References
CVE.org recordcve.org
NVD entrynvd.nist.gov
RHSA-2026:26562access.redhat.com
RHSA-2026:26566access.redhat.com
RHSA-2026:26590access.redhat.com
RHSA-2026:26610access.redhat.com
RHSA-2026:26709access.redhat.com
RHSA-2026:28923access.redhat.com
RHSA-2026:29844access.redhat.com
RHSA-2026:36083access.redhat.com