Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds heap write in dri2 drigetbuffers/drigetbufferswithformat (Red Hat Red Hat Enterprise Linux 10)

CVE-2026-50264

HIGH 7.8

At a glance

Source: NVD
EPSS: EPSS 0.15 % · percentile 4 (2026-10-29)
State: PUBLISHED
Published: 2026-06-05 10:36 UTC
Updated: 2026-09-28 11:46 UTC
Assigner: redhat
NVD status: Modified

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Description

An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat. A client that requests multiple DRI2BufferBackLeft attachments and one DRI2BufferFrontLeft can trigger an out-of-bounds heap write. This may be used to crash the server, or for privilege escalation if the X server runs as root.

Weaknesses (CWE)

CWE-787 — Out-of-bounds Write

References

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	redhat
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	redhat-SADP
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · secalert@redhat.com (Secondary)
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

European references

ENISA EUVD · EUVD-2026-34818
GCVE · GCVE-0-2026-50264

Affected configurations (NVD CPE)

cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:* < 21.1.23
cpe:2.3:a:x.org:xwayland:*:*:*:*:*:*:*:* < 24.1.12
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

Affected products

Product	Versions
Red Hat · Red Hat Enterprise Linux 10	unaffected 0:24.1.9-4.el10_2.2 < *
Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support	unaffected 0:24.1.5-6.el10_0.1 < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support	unaffected 0:1.20.4-35.el7_9 < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support	unaffected 0:1.8.0-36.el7_9.5 < *
Red Hat · Red Hat Enterprise Linux 8	unaffected 0:21.1.3-20.el8_10.2 < *
Red Hat · Red Hat Enterprise Linux 8	unaffected 0:1.20.11-28.el8_10.2 < *
Red Hat · Red Hat Enterprise Linux 8	unaffected 0:1.15.0-10.el8_10 < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	unaffected 0:1.20.10-5.el8_4 < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	unaffected 0:1.11.0-8.el8_4.16 < *
Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	unaffected 0:1.20.10-5.el8_4 < *
Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	unaffected 0:1.11.0-8.el8_4.16 < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	unaffected 0:1.20.11-8.el8_6 < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	unaffected 0:21.1.3-2.el8_6.7 < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	unaffected 0:1.12.0-6.el8_6.18 < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	unaffected 0:1.20.11-8.el8_6 < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	unaffected 0:21.1.3-2.el8_6.7 < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	unaffected 0:1.12.0-6.el8_6.18 < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service	unaffected 0:1.20.11-19.el8_8 < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service	unaffected 0:21.1.3-13.el8_8.1 < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service	unaffected 0:1.12.0-15.el8_8.18 < *

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD

⚠️ Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds heap write in dri2 drigetbuffers/drigetbufferswithformat (Red Hat Red Hat Enterprise Linux 10)