CVE record · CVE-2025-26595

Xorg: xwayland: buffer overflow in xkbvmodmasktext()

CVSS 7.8 HighEPSS 0.0044 · 38th percentile

Published by the CVE Program (CNA: redhat) at 25 Feb 2025, 15:54 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
Not given	Not given Package name: xserver https://gitlab.freedesktop.org/xorg/xserver/	affected before 21.1.16 semver affected 22.0.0 to before 24.1.6 semver Other versions: unaffected
Red Hat	Red Hat Enterprise Linux 10 Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:24.1.5-3.el10_0 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.1.0-25.el6_10 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 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 0:1.20.4-30.el7_9 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 0:1.13.1-15.el8_10 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.9.0-15.el8_2.13 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_4.12 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Telecommunications Update Service Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.11.0-8.el8_4.12 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.11.0-8.el8_4.12 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_6.13 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-6.el8_6.13 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-6.el8_6.13 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Extended Update Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-15.el8_8.12 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 0:1.14.1-1.el9_5.1 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 0:1.20.11-28.el9_6 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 0:23.2.7-3.el9_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.11.0-22.el9_0.13 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Extended Update Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-14.el9_2.10 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.13.1-8.el9_4.5 to before * rpm 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
Red Hat	Red Hat Enterprise Linux 8 Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unaffected
Red Hat	Red Hat Enterprise Linux 8 Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unaffected

Identifiers: CVE-2025-26595
CNA: redhat
Weakness (CWE): CWE-121
Tags: Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
Red Hat Enterprise Linux 7 Extended Lifecycle Support
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.2 Advanced Update Support
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.4 Telecommunications Update Service
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
Memory corruption
Published: 25 Feb 2025
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)

CISA KEV Not listed.
EPSS 0.0044, the 38th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

25 Feb 2025, 15:54 UTC Confirmed by the CVE List
25 Feb 2025, 16:15 UTC Confirmed by NVD

Sources

References from the CNA

access.redhat.com/errata/RHSA-2025:2500 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:2502 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:2861 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:2862 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:2865 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:2866 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:2873 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:2874 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:2875 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:2879 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:2880 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:3976 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:7163 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:7165 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:7458 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2025-26595 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2345257 issue-trackingredhat

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.