CVE record · CVE-2026-50264

Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds heap write in dri2 drigetbuffers/drigetbufferswithformat

CVSS 7.8 HighEPSS 0.0015 · 4th percentile

Published by the CVE Program (CNA: redhat) at 5 Jun 2026, 10:36 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 10 Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:24.1.9-4.el10_2.2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:24.1.5-6.el10_0.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.4-35.el7_9 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.8.0-36.el7_9.5 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-20.el8_10.2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-28.el8_10.2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.15.0-10.el8_10 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.10-5.el8_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.11.0-8.el8_4.16 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.10-5.el8_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.11.0-8.el8_4.16 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-8.el8_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-2.el8_6.7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-6.el8_6.18 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-8.el8_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-2.el8_6.7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-6.el8_6.18 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-19.el8_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-13.el8_8.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-15.el8_8.18 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-19.el8_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-13.el8_8.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-15.el8_8.18 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:24.1.9-4.el9_8.2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-34.el9_8.2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.15.0-7.el9_8.2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-21.el9_2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-10.el9_2.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-14.el9_2.15 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-29.el9_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:22.1.9-8.el9_4.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.13.1-8.el9_4.10 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-34.el9_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:23.2.7-6.el9_6.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.14.1-11.el9_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 6 Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat Enterprise Linux 6 Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unknown

Identifiers: CVE-2026-50264
CNA: redhat
Weakness (CWE): CWE-787
Tags: Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 7 Extended Lifecycle Support
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
Memory corruption
Published: 5 Jun 2026
Updated: 4 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CNA (redhat)Used for this record
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	ADP (redhat-SADP)

CISA KEV Not listed.
EPSS 0.0015, the 4th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

5 Jun 2026, 10:36 UTC Confirmed by the CVE List
5 Jun 2026, 12:16 UTC Confirmed by NVD

Sources

References from the CNA

access.redhat.com/errata/RHSA-2026:26562 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26566 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26590 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26610 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26709 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:28923 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:29844 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:36083 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:36085 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:36086 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:36087 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:36632 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:36633 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:36634 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:36768 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:36791 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:36792 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:36798 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:38502 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:38810 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:46377 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:46382 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:46385 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:46392 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:46456 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:46460 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:46473 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2026-50264 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2485389 issue-trackingredhat
gitlab.freedesktop.org/xorg/xserver/-/commit/339c279514326134b0878fc23ce6e9520440ce7f

And 2 more on the CVE record.

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.