Xorg: xwayland: use of uninitialized pointer in compredirectwindow()

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Summary

CVECVE-2025-26599
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-02-25 16:15:39 UTC
Updated2026-04-06 13:17:16 UTC
DescriptionAn access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect() may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow() will return a BadAlloc error without validating the window tree marked just before, which leaves the validated data partly initialized and the use of an uninitialized pointer later.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000210000 probability, percentile 0.057310000 (date 2026-04-07)

Problem Types: CWE-824 | CWE-824 Access of Uninitialized Pointer

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Redhat Enterprise Linux 7.0 All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Enterprise Linux 9.0 All All All
Application Tigervnc Tigervnc - All All All
Application X.org Xwayland All All All All
Application X.org X Server All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 10 unaffected 0:24.1.5-3.el10_0 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION unaffected 0:1.1.0-25.el6_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support unaffected 0:1.8.0-36.el7_9 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support unaffected 0:1.20.4-30.el7_9 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:1.13.1-15.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support unaffected 0:1.9.0-15.el8_2.13 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support unaffected 0:1.11.0-8.el8_4.12 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service unaffected 0:1.11.0-8.el8_4.12 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Update Services For SAP Solutions unaffected 0:1.11.0-8.el8_4.12 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support unaffected 0:1.12.0-6.el8_6.13 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service unaffected 0:1.12.0-6.el8_6.13 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions unaffected 0:1.12.0-6.el8_6.13 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support unaffected 0:1.12.0-15.el8_8.12 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:1.14.1-1.el9_5.1 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:1.20.11-28.el9_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:23.2.7-3.el9_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions unaffected 0:1.11.0-22.el9_0.13 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support unaffected 0:1.12.0-14.el9_2.10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support unaffected 0:1.13.1-8.el9_4.5 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 8 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2025:2879 [email protected] access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2025:3976 [email protected] access.redhat.com
access.redhat.com/security/cve/CVE-2025-26599 [email protected] access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2025:7163 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:7165 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:2502 [email protected] access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2025:2861 [email protected] access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2025:2874 [email protected] access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2025:2862 [email protected] access.redhat.com Third Party Advisory
lists.debian.org/debian-lts-announce/2025/02/msg00036.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
access.redhat.com/errata/RHSA-2025:2866 [email protected] access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2025:2873 [email protected] access.redhat.com Third Party Advisory
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com Issue Tracking
access.redhat.com/errata/RHSA-2025:2865 [email protected] access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2025:2500 [email protected] access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2025:2880 [email protected] access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2025:7458 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:2875 [email protected] access.redhat.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2025-02-12T14:15:01.808ZReported to Red Hat.
CNA2025-02-25T00:00:00.000ZMade public.

Workarounds

CNA: 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.

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