CVE-2025-26599

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

Description

An 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.

Remediation

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.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.03%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
Affected: Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2025:2500 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2025:2502 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2025:2861 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2025:2862 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2025:2865 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2025:2866 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2025:2873 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2025:2874 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2025:2875 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2025:2879 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2025:2880 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2025:7163 vendor advisory
https://access.redhat.com/errata/RHSA-2025:7165 vendor advisory
https://access.redhat.com/errata/RHSA-2025:7458 vendor advisory
https://access.redhat.com/security/cve/CVE-2025-26599 vdb entry third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2345253 issue tracking

Frequently Asked Questions

What is the severity of CVE-2025-26599?
CVE-2025-26599 has been scored as a high severity vulnerability.
How to fix CVE-2025-26599?
As a workaround for remediating CVE-2025-26599: 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.
Is CVE-2025-26599 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-26599 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-26599?
CVE-2025-26599 affects Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8.
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