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

highCVSS 7.5CVE-2026-58016

CSIRTS triage

vendor: Glib product: GlibOther

What: There is an integer underflow in gio/gdbusintrospection.c via "g_dbus_node_info_new_for_xml".
Who is affected: Deployments using affected versions of Glib.
Urgency: Remediation is high urgency due to the high severity of the issue.
Action: Patch to the latest version to resolve CVE-2026-58016.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58016

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-580160.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58016	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highCVE-2026-58016: A flaw was found in GLib. A state confusion issue exists in g_dbus_node_info_new_for_xml() in …nvd

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