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xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libXfont2 name length mismatch

🗓️ 08 Jul 2026 09:30:28Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 4 Views

Stack buffer overflow in Xorg server and Xwayland font alias resolution due to libXfont2 name length mismatch.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
FreeBSD		xwayland -- Multiple vulnerabilities
1 Jun 202600:00
–freebsd
FreeBSD		xorg-server -- Multiple vulnerabilities
1 Jun 202600:00
–freebsd
ATTACKERKB		CVE-2026-50256
5 Jun 202610:31
–attackerkb
Tenable Nessus		Amazon Linux 2023 : xorg-x11-server-Xwayland, xorg-x11-server-Xwayland-devel (ALAS2023-2026-1789)
8 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : xorg-x11-server-common, xorg-x11-server-devel, xorg-x11-server-source (ALAS2023-2026-1790)
8 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : tigervnc, tigervnc-icons, tigervnc-license (ALAS2023-2026-1892)
22 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : xorg-x11-server, --advisory ALAS2-2026-3336 (ALAS-2026-3336)
8 Jun 202600:00
–nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0166: xorg-x11-server (ALINUX3-SA-2026:0166)
1 Jul 202600:00
–nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0177: tigervnc (ALINUX3-SA-2026:0177)
1 Jul 202600:00
–nessus
Tenable Nessus		AlmaLinux 8 : xorg-x11-server-Xwayland (ALSA-2026:26562)
18 Jun 202600:00
–nessus
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.4aarch64xorg-x11-server-xwayland0:22.1.9-8.el9_4.1xorg-x11-server-Xwayland-0:22.1.9-8.el9_4.1.aarch64.rpm
Red Hat Enterprise Linux9.4ppc64lexorg-x11-server-xwayland0:22.1.9-8.el9_4.1xorg-x11-server-Xwayland-0:22.1.9-8.el9_4.1.ppc64le.rpm
Red Hat Enterprise Linux9.4s390xxorg-x11-server-xwayland0:22.1.9-8.el9_4.1xorg-x11-server-Xwayland-0:22.1.9-8.el9_4.1.s390x.rpm
Red Hat Enterprise Linux9.4x86_64xorg-x11-server-xwayland0:22.1.9-8.el9_4.1xorg-x11-server-Xwayland-0:22.1.9-8.el9_4.1.x86_64.rpm
Red Hat Enterprise Linux9.4aarch64xorg-x11-server-xwayland-debuginfo0:22.1.9-8.el9_4.1xorg-x11-server-Xwayland-debuginfo-0:22.1.9-8.el9_4.1.aarch64.rpm
Red Hat Enterprise Linux9.4ppc64lexorg-x11-server-xwayland-debuginfo0:22.1.9-8.el9_4.1xorg-x11-server-Xwayland-debuginfo-0:22.1.9-8.el9_4.1.ppc64le.rpm
Red Hat Enterprise Linux9.4s390xxorg-x11-server-xwayland-debuginfo0:22.1.9-8.el9_4.1xorg-x11-server-Xwayland-debuginfo-0:22.1.9-8.el9_4.1.s390x.rpm
Red Hat Enterprise Linux9.4x86_64xorg-x11-server-xwayland-debuginfo0:22.1.9-8.el9_4.1xorg-x11-server-Xwayland-debuginfo-0:22.1.9-8.el9_4.1.x86_64.rpm
Red Hat Enterprise Linux9.4aarch64xorg-x11-server-xwayland-debugsource0:22.1.9-8.el9_4.1xorg-x11-server-Xwayland-debugsource-0:22.1.9-8.el9_4.1.aarch64.rpm
Red Hat Enterprise Linux9.4ppc64lexorg-x11-server-xwayland-debugsource0:22.1.9-8.el9_4.1xorg-x11-server-Xwayland-debugsource-0:22.1.9-8.el9_4.1.ppc64le.rpm
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08 Jul 2026 19:27Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.17.8
EPSS0.00157
SSVC
CWE-121
font aliasbuffer overflowlibXfont2xorg serverprivilege escalation
4