CVE-2026-58016Glib: integer underflow in gio/gdbusintrospection.c via "g_dbus_node_info_new_for_xml"

Description

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.

Timeline

Scores

EPSS (exploitation in 30 days)

0.56% · top 53% of all CVEs (15 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: yes · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Affected products

• GNOME · GLib

  • affected < 2.89.0

• Red Hat · Red Hat Enterprise Linux 10

  • unaffected 0:2.80.4-12.el10_2.14 – < *

• Red Hat · Red Hat Enterprise Linux 10

  • unaffected 0:2.89.2-1.el10 – < *

• Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support

  • unaffected 0:2.80.4-4.el10_0.10 – < *

• Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support

  • unaffected 0:2.56.1-13.el7_9 – < *

• Red Hat · Red Hat Enterprise Linux 8

  • unaffected 0:2.70.1-9.el8_10 – < *

• Red Hat · Red Hat Enterprise Linux 8

  • unaffected 0:2.56.4-170.el8_10 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

  • unaffected 0:2.56.4-10.el8_4.6 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

  • unaffected 0:2.56.4-10.el8_4.6 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

  • unaffected 0:2.56.4-158.el8_6.6 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

  • unaffected 0:2.56.4-158.el8_6.6 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service

  • unaffected 0:2.56.4-165.el8_8.1 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

  • unaffected 0:2.56.4-165.el8_8.1 – < *

• Red Hat · Red Hat Enterprise Linux 9

  • unaffected 0:2.68.4-19.el9_8.2 – < *

• Red Hat · Red Hat Enterprise Linux 9

  • unaffected 0:2.68.4-19.el9_8.2 – < *

• Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

  • unaffected 0:2.68.4-7.el9_2.6 – < *

• Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

  • unaffected 0:2.68.4-14.el9_4.7 – < *

• Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support

  • unaffected 0:2.68.4-16.el9_6.6 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.17

  • unaffected 1791371080 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.17

  • unaffected 1791371069 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.17

  • unaffected 1791788287 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.17

  • unaffected 1791378395 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.17

  • unaffected 1791970484 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.18

  • unaffected 1791459707 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.18

  • unaffected 1791459711 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.18

  • unaffected 1791459759 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.18

  • unaffected 1789029076 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.18

  • unaffected 1791966259 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.20

  • unaffected 1790223279 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.20

  • unaffected 1790223719 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.20

  • unaffected 1790272426 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.20

  • unaffected 1790589998 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.20

  • unaffected 1790589912 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.20

  • unaffected 1790589914 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.20

  • unaffected 1790589855 – < *

• Red Hat · Cert Manager support for Red Hat OpenShift release 1.20

  • unaffected 1790598593 – < *

• Red Hat · Red Hat Discovery 2

  • unaffected 1784821670 – < *

• Red Hat · Red Hat Discovery 2

  • unaffected 1784821750 – < *

• Red Hat · Red Hat Insights proxy 1.5

  • unaffected 1786433656 – < *

• Red Hat · Red Hat OpenShift AI 3.0

  • unaffected 1790276886 – < *

• Red Hat · Red Hat OpenShift AI 3.0

  • unaffected 1790276884 – < *

• Red Hat · Red Hat OpenShift AI 3.0

  • unaffected 1790277045 – < *

• Red Hat · Red Hat OpenShift AI 3.0

  • unaffected 1790276889 – < *

• Red Hat · Red Hat OpenShift AI 3.0

  • unaffected 1790276974 – < *

• Red Hat · Red Hat OpenShift AI 3.2

  • unaffected 1790703497 – < *

• Red Hat · Red Hat OpenShift AI 3.2

  • unaffected 1790703506 – < *

• Red Hat · Red Hat OpenShift AI 3.2

  • unaffected 1790703590 – < *

• Red Hat · Red Hat OpenShift AI 3.2

  • unaffected 1790703568 – < *

• Red Hat · Red Hat OpenShift AI 3.2

  • unaffected 1790703586 – < *

• Red Hat · Red Hat OpenShift AI 3.2

  • unaffected 1790703494 – < *

• Red Hat · Red Hat OpenShift AI 3.4

  • unaffected 1790703542 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1784794818 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1784794778 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1784795112 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1784794289 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1784795076 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1787241211 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1787135742 – < *

• Red Hat · Red Hat Update Infrastructure 5

  • unaffected 1787241260 – < *

• Red Hat · Red Hat Enterprise Linux 6

  All versions: affected

• Red Hat · Red Hat Enterprise Linux 9

  All versions: affected

• Red Hat · Red Hat Hardened Images

  All versions: unaffected

• Red Hat · Red Hat OpenShift AI (RHOAI)

  All versions: unaffected

What to do

Workaround: 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.

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• EUVD EUVD-2026-40319 (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-58016](https://cveledger.app/badge/CVE-2026-58016.svg)](https://cveledger.app/cve/CVE-2026-58016)

Record last updated 10 Nov 2026, 19:23 UTC.