CVE-2026-15588

A denial-of-service and resource exhaustion vulnerability exists within the GDBus component of GLib. The gdbusauth authentication mechanism fails to enforce proper length limitations on data lines read from a client. An unauthenticated local or remote attacker can exploit this lack of input validation by sending excessively long streams of data, causing the application to consume massive amounts of system memory and CPU, potentially leading to a crash or system hang.

A flaw was found in the GDBus component of GLib. A local or remote unauthenticated attacker could send an engineered stream of data without line length limitations during the authentication process (gdbusauth), leading to excessive memory allocation and CPU consumption. This resource exhaustion can result in a denial-of-service (DoS) condition, causing applications or services dependent on GLib to become unstable or crash.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

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