CVE-2026-58016

Summary

A flaw was found in GLib. A state confusion issue exists in g_dbus_node_info_new_for_xml() in the gio/gdbusintrospection.c file when processing malformed D-Bus introspection XML, specifically with a node element nested within other elements like method, signal, property or arg. This issue can cause an unsigned integer overflow and lead to an out-of-bounds read, resulting in a denial of service.

Affected Software

VendorProductVersion RangeStatus
GNOMEGLib0 < 2.89.0affected
Red HatRed Hat Enterprise Linux 100:2.80.4-12.el10_2.14 < *unaffected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support0:2.80.4-4.el10_0.10 < *unaffected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support0:2.56.1-13.el7_9 < *unaffected
Red HatRed Hat Enterprise Linux 80:2.70.1-9.el8_10 < *unaffected
Red HatRed Hat Enterprise Linux 80:2.56.4-170.el8_10 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support0:2.56.4-10.el8_4.6 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On0:2.56.4-10.el8_4.6 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support0:2.56.4-158.el8_6.6 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On0:2.56.4-158.el8_6.6 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service0:2.56.4-165.el8_8.1 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions0:2.56.4-165.el8_8.1 < *unaffected
Red HatRed Hat Enterprise Linux 90:2.68.4-19.el9_8.2 < *unaffected
Red HatRed Hat Enterprise Linux 90:2.68.4-19.el9_8.2 < *unaffected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions0:2.68.4-7.el9_2.6 < *unaffected
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions0:2.68.4-14.el9_4.7 < *unaffected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support0:2.68.4-16.el9_6.6 < *unaffected
Red HatRed Hat Discovery 21784821670 < *unaffected
Red HatRed Hat Discovery 21784821750 < *unaffected
Red HatRed Hat Insights proxy 1.51786433656 < *unaffected
Red HatRed Hat Update Infrastructure 51784794818 < *unaffected
Red HatRed Hat Update Infrastructure 51784794778 < *unaffected
Red HatRed Hat Update Infrastructure 51784795112 < *unaffected
Red HatRed Hat Update Infrastructure 51784794289 < *unaffected
Red HatRed Hat Update Infrastructure 51784795076 < *unaffected

Weaknesses

  • CWE-191: Integer Underflow (Wrap or Wraparound)

Workarounds

To mitigate this vulnerability, implement input validation to sanitize untrusted D-Bus introspection XML, specifically rejecting malformed structures such as <node> elements improperly nested within <method>, <signal>, <property> or <arg> elements before calling g_dbus_node_info_new_for_xml(). Alternatively, restricting the application to only process XML input from trusted, authenticated sources will completely neutralize this issue.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References