CVE-2026-50263
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()
Vexday Risk Score
13Bajo
Decisión SSVC (CISA)
Track
Sin señal de explotación → monitorear
CVSS 5.5EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Ciclo de vida
05 jun 2026Publicada en NVD
Recomendación: Monitorear — sin señal de explotación por ahora.
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/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Productos afectados
Red Hat · Red Hat Enterprise Linux 10Red Hat · Red Hat Enterprise Linux 6Red Hat · Red Hat Enterprise Linux 7Red Hat · Red Hat Enterprise Linux 8Red Hat · Red Hat Enterprise Linux 9Referencias
https://access.redhat.com/errata/RHSA-2026:26562https://access.redhat.com/errata/RHSA-2026:26566https://access.redhat.com/errata/RHSA-2026:26590https://access.redhat.com/errata/RHSA-2026:26610https://access.redhat.com/errata/RHSA-2026:26709https://access.redhat.com/errata/RHSA-2026:28923https://access.redhat.com/errata/RHSA-2026:29844https://access.redhat.com/security/cve/CVE-2026-50263https://bugzilla.redhat.com/show_bug.cgi?id=2485388https://gitlab.freedesktop.org/xorg/xserver/-/commit/ecc634f1b2f7aa473d3a267eada98c4918bf9e05https://lists.x.org/archives/xorg-announce/2026-June/003702.htmlhttps://redhat.atlassian.net/browse/PSIRTSUPT-16950