Uninitialized Pointer Flaw in X.Org and Xwayland
CVE-2025-26599

7.8HIGH

Key Information:

Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 7 Extended Lifecycle Support
Red Hat Enterprise Linux 8
Vendor
CVE Published:
25 February 2025

What is CVE-2025-26599?

An uninitialized pointer vulnerability has been identified in X.Org and Xwayland that arises in the compCheckRedirect() function. If this function fails to allocate the backing pixmap, it can lead to a BadAlloc error when compRedirectWindow() is called. This error occurs without proper validation of the window tree marked just prior, resulting in a state where validated data remains only partially initialized. Consequently, this can lead to potential stability issues and unexpected behavior within the graphics system.

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References

https://access.redhat.com/errata/RHSA-2025:2500
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:2502
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:2861
vendor-advisoryx_refsource_REDHAT

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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