A heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms() differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-4072-1 xorg-server security update
Debian DSA Debian DSA DSA-5872-1 xorg-server security update
EUVD EUVD EUVD-2025-5403 A heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms() differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow.
Ubuntu USN Ubuntu USN USN-7299-1 X.Org X Server vulnerabilities
Ubuntu USN Ubuntu USN USN-7299-2 X.Org X Server vulnerabilities
Ubuntu USN Ubuntu USN USN-7299-4 X.Org X Server regression
Fixes

Solution

No solution given by the vendor.


Workaround

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

History

Tue, 04 Nov 2025 07:30:00 +0900

Type Values Removed Values Added
References

Wed, 14 May 2025 05:15:00 +0900

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:10.0
References

Tue, 13 May 2025 23:30:00 +0900

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:9 cpe:/a:redhat:enterprise_linux:9::crb
References

Fri, 09 May 2025 02:15:00 +0900

Type Values Removed Values Added
CPEs cpe:2.3:a:x.org:x_server:-:*:*:*:*:*:*:*
cpe:2.3:a:x.org:xwayland:-:*:*:*:*:*:*:*
cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*
cpe:2.3:a:x.org:xwayland:*:*:*:*:*:*:*:*

Sun, 23 Mar 2025 00:15:00 +0900

Type Values Removed Values Added
Weaknesses CWE-122

Tue, 18 Mar 2025 00:30:00 +0900

Type Values Removed Values Added
CPEs cpe:/a:redhat:rhel_aus:8.2
cpe:/a:redhat:rhel_aus:8.4
cpe:/a:redhat:rhel_aus:8.6
cpe:/a:redhat:rhel_e4s:8.4
cpe:/a:redhat:rhel_e4s:8.6
cpe:/a:redhat:rhel_e4s:9.0
cpe:/a:redhat:rhel_eus:8.8
cpe:/a:redhat:rhel_eus:9.2
cpe:/a:redhat:rhel_eus:9.4
cpe:/a:redhat:rhel_tus:8.4
cpe:/a:redhat:rhel_tus:8.6

Mon, 17 Mar 2025 14:15:00 +0900

Type Values Removed Values Added
First Time appeared Redhat rhel Els
CPEs cpe:/o:redhat:enterprise_linux:7 cpe:/a:redhat:rhel_aus:8.2::appstream
cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/a:redhat:rhel_e4s:8.6::appstream
cpe:/a:redhat:rhel_e4s:9.0::appstream
cpe:/a:redhat:rhel_tus:8.6::appstream
cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat rhel Els
References

Mon, 17 Mar 2025 11:30:00 +0900

Type Values Removed Values Added
First Time appeared Redhat rhel Aus
Redhat rhel E4s
Redhat rhel Tus
CPEs cpe:/a:redhat:rhel_aus:8.4::appstream
cpe:/a:redhat:rhel_e4s:8.4::appstream
cpe:/a:redhat:rhel_eus:9.2::appstream
cpe:/a:redhat:rhel_eus:9.4::appstream
cpe:/a:redhat:rhel_tus:8.4::appstream
Vendors & Products Redhat rhel Aus
Redhat rhel E4s
Redhat rhel Tus
References

Mon, 17 Mar 2025 10:45:00 +0900

Type Values Removed Values Added
First Time appeared Redhat rhel Eus
CPEs cpe:/a:redhat:rhel_eus:8.8::appstream
Vendors & Products Redhat rhel Eus
References

Tue, 11 Mar 2025 11:45:00 +0900

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:8
cpe:/a:redhat:enterprise_linux:9

Mon, 10 Mar 2025 22:15:00 +0900

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:8::appstream
References

Mon, 10 Mar 2025 22:00:00 +0900

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:9::appstream
References

Wed, 05 Mar 2025 03:00:00 +0900

Type Values Removed Values Added
First Time appeared Tigervnc
Tigervnc tigervnc
X.org
X.org x Server
X.org xwayland
Weaknesses CWE-787
CPEs cpe:2.3:a:tigervnc:tigervnc:-:*:*:*:*:*:*:*
cpe:2.3:a:x.org:x_server:-:*:*:*:*:*:*:*
cpe:2.3:a:x.org:xwayland:-:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
Vendors & Products Tigervnc
Tigervnc tigervnc
X.org
X.org x Server
X.org xwayland

Wed, 26 Feb 2025 11:15:00 +0900

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Wed, 26 Feb 2025 03:15:00 +0900

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 26 Feb 2025 01:00:00 +0900

Type Values Removed Values Added
Description A heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms() differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow.
Title Xorg: xwayland: heap overflow in xkbwritekeysyms()
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-122
CPEs cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-11-06T21:09:08.425Z

Reserved: 2025-02-12T14:12:22.795Z

Link: CVE-2025-26596

cve-icon Vulnrichment

Updated: 2025-11-03T21:13:01.956Z

cve-icon NVD

Status : Modified

Published: 2025-02-25T16:15:38.603

Modified: 2025-11-03T22:18:42.310

Link: CVE-2025-26596

cve-icon Redhat

Severity : Important

Publid Date: 2025-02-25T00:00:00Z

Links: CVE-2025-26596 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses