CVE-2026-58016: Integer Underflow (Wrap or Wraparound) in GNOME GLib
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.
AI Analysis
Technical Summary
CVE-2026-58016 is an integer underflow vulnerability in the glib2 library, specifically in the gio/gdbusintrospection.c source file, triggered through the g_dbus_node_info_new_for_xml function. This vulnerability affects Red Hat Enterprise Linux versions 9 and 10, including various architectures and extended update support versions. Red Hat has issued security advisories RHSA-2026:42089 and RHSA-2026:42063 providing updated glib2 packages that fix this issue. The vulnerability is rated as having an important security impact by Red Hat and is associated with CWE-191 (Integer Underflow).
Potential Impact
The integer underflow vulnerability could potentially lead to unexpected behavior or security issues in applications relying on the glib2 library's D-Bus introspection functionality. Red Hat rates the security impact as important (high severity). There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Red Hat has released patched versions of the glib2 package for affected Red Hat Enterprise Linux 9 and 10 versions. Users should apply the official updates as described in Red Hat advisories RHSA-2026:42089 and RHSA-2026:42063. Detailed instructions for applying these updates are available at https://access.redhat.com/articles/11258. Applying these updates will remediate the integer underflow vulnerability. No additional mitigation steps are indicated by the vendor.
CVE-2026-58016: Integer Underflow (Wrap or Wraparound) in GNOME GLib
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.
CVSS v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-58016 is an integer underflow vulnerability in the glib2 library, specifically in the gio/gdbusintrospection.c source file, triggered through the g_dbus_node_info_new_for_xml function. This vulnerability affects Red Hat Enterprise Linux versions 9 and 10, including various architectures and extended update support versions. Red Hat has issued security advisories RHSA-2026:42089 and RHSA-2026:42063 providing updated glib2 packages that fix this issue. The vulnerability is rated as having an important security impact by Red Hat and is associated with CWE-191 (Integer Underflow).
Potential Impact
The integer underflow vulnerability could potentially lead to unexpected behavior or security issues in applications relying on the glib2 library's D-Bus introspection functionality. Red Hat rates the security impact as important (high severity). There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Red Hat has released patched versions of the glib2 package for affected Red Hat Enterprise Linux 9 and 10 versions. Users should apply the official updates as described in Red Hat advisories RHSA-2026:42089 and RHSA-2026:42063. Detailed instructions for applying these updates are available at https://access.redhat.com/articles/11258. Applying these updates will remediate the integer underflow vulnerability. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:42090
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a5e79ed2a4a8d59899bbb39
Added to database: 07/20/2026, 19:41:33 UTC
Last enriched: 08/06/2026, 22:38:06 UTC
Last updated: 09/03/2026, 22:52:13 UTC
Views: 121
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