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CVE-2026-58016

Glib: integer underflow in gio/gdbusintrospection.c via "g_dbus_node_info_new_for_xml"

No known exploitation. EPSS puts it in the 47th percentile. Fixed versions are out.

CVSS 3.17.5HighEPSS percentile47th0.6% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products7 fixed builds listed below
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OpenVAS · 48 checks

e.g. OID 1.3.6.1.4.1.25623.1.0.190575

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Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • GNOME GLibAffected: < 2.89.0Upgrade to: 2.89.0Stated by: CVE record
  • Red Hat Enterprise Linux 10Fixed builds0:2.80.4-12.el10_2.14, 0:2.70.1-9.el8_10, 0:2.68.4-19.el9_8.2Stated by: CVE record
  • Red Hat Enterprise Linux 10.0 Extended Update SupportFixed builds0:2.80.4-4.el10_0.10Stated by: CVE record
  • Red Hat Enterprise Linux 7 Extended Lifecycle SupportFixed builds0:2.56.1-13.el7_9Stated by: CVE record
  • Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed builds0:2.56.4-10.el8_4.6Stated by: CVE record

Versions as the sources state them. 20 more products have version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

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.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS47th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.6% chance of exploitation activity in the next 30 days, which ranks it in the 47th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

58 events over 133 days, from the signal feeds we watch.

  1. Patch availableworkaround available, record updated
  2. Patch availableworkaround available, record updated
  3. Patch availableworkaround available, record updated
  4. Patch availableworkaround available, record updated
  5. Workaround availableworkaround available, record updated, record updated
  6. Workaround availablerecord updated

Affected products

And 32 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Scored 7.5 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality NoneNo confidentiality impact
  • Integrity NoneNo integrity impact
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 44 more references. See all after sign-in

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