CVE-2026-58016 Red Hat CVE debrief

Who should care

Users of GLib, particularly those using Red Hat Enterprise Linux, should be aware of this vulnerability. The issue affects multiple versions of Red Hat Enterprise Linux, including versions 6, 7, 8, 9, and 10.

Technical summary

The vulnerability exists in the g_dbus_node_info_new_for_xml() function in the gio/gdbusintrospection.c file of GLib. When processing malformed D-Bus introspection XML, a state confusion issue can occur, leading to an unsigned integer overflow and an out-of-bounds read. This results in a denial of service. The Common Vulnerability Scoring System (CVSS) score for this vulnerability is 7.5, indicating a high severity.

Defensive priority

High priority should be given to patching this vulnerability, as it can lead to a denial of service. The CVSS score of 7.5 indicates a high severity, and users of affected systems should take immediate action to mitigate the risk.

Recommended defensive actions

• Apply the patch provided by the vendor to fix the vulnerability
• Update GLib to a version that is not vulnerable
• Use compensating controls, such as monitoring and intrusion detection systems, to detect and prevent exploitation
• Perform inventory checks to ensure that all affected systems are identified and patched
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The vulnerability was reported by Red Hat and is tracked as CVE-2026-58016. The NVD entry for this vulnerability provides additional information, including the CVSS score and affected products. Red Hat has provided errata and security advisories to address this issue.

Official resources