Integer overflow in GNOME Glib
CVE-2026-58016
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.010 · change: +0.004
Affected products
- GNOME Glib — versions 0
- Red Hat Discovery 2 — versions 1784821670, 1784821750
- Red Hat Enterprise Linux 10 — versions 0:2.80.4-12.el10_2.14
- Red Hat Enterprise Linux 10.0 Extended Update Support — versions 0:2.80.4-4.el10_0.10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 7 Extended Lifecycle Support — versions 0:2.56.1-13.el7_9
- Red Hat Enterprise Linux 8 — versions 0:2.70.1-9.el8_10, 0:2.56.4-170.el8_10
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 0:2.56.4-10.el8_4.6
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On — versions 0:2.56.4-10.el8_4.6
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-58016 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)
- gitlab.gnome.org/GNOME/glib/-/issues/3932 (Exploit, Third Party Advisory, Issue Tracking)
- access.redhat.com/errata/RHSA-2026:42090 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:42063 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:42089 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:44481 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:46836 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:49512 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:51176 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-58016?
- CVE-2026-58016 is a high-severity vulnerability in GNOME Glib, classified under Integer Underflow. CVSS score: 7.5/10. Published 2026-06-30.
- How severe is CVE-2026-58016?
- High severity. CVSS v3 base score is 7.5 out of 10.