Denial-of-Service Vulnerability in GLib's GDBus by GNOME
CVE-2026-15588

5.3MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
20 July 2026

What is CVE-2026-15588?

A denial-of-service and resource exhaustion issue has been identified in the GDBus component of GLib, due to the gdbusauth authentication mechanism failing to enforce length constraints on data lines from clients. An attacker, whether local or remote, can exploit this vulnerability by sending excessively long streams of data. This can lead to the application consuming excessive system memory and CPU resources, potentially resulting in application crashes or system hangs, severely impacting the performance and stability of affected systems.

References

https://access.redhat.com/security/cve/CVE-2026-15588
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2499675
issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/glib/-/issues/3985

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Gitee Codepecker Lab for reporting this issue.
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