9.1

CVE-2026-58016: gnome glib Integer Underflow (Wrap or Wraparound)

CVSS: 9.1v3.1CriticalModified
AliasesRHSA-2026:42063RHSA-2026:42089RHSA-2026:42090
Published 30-06-2026Last modified 14-10-2026
Open JSON

Vulnerability summary

CVE-2026-58016 is a critical (CVSS 9.1) Integer Underflow (Wrap or Wraparound) vulnerability in gnome glib. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 44.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (NVD)
EPSS score
0.55%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 10 · Related 9
OPENSUSE-SU-2026:21410-1RHSA-2026:49512SUSE-SU-2026:22846-1SUSE-SU-2026:22928-1SUSE-SU-2026:23009-1SUSE-SU-2026:23078-1

Timeline

  1. 30-06-2026
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

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 metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.55%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

0.00 pp

From 0.55% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.55%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (gitlab.gnome.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Redhat12 products
  • enterprise_linuxEOL6.0 | 7.0 | 8.0 | 9.0 | 10.0
  • glib2< 0:2.80.4-12.el10_2.14 | < 0:2.68.4-19.el9_8.2 | < 0:2.56.4-170.el8_10 | < 0:2.68.4-16.el9_6.6 | < 0:2.68.4-7.el9_2.6 | < 0:2.68.4-14.el9_4.7 | < 0:2.56.4-158.el8_6.6 | < 0:2.56.4-165.el8_8.1 | < 0:2.56.1-13.el7_9 | < 0:2.56.4-10.el8_4.6 | < 0:2.80.4-4.el10_0.10
  • glib2-debuginfo< 0:2.80.4-12.el10_2.14 | < 0:2.68.4-19.el9_8.2 | < 0:2.56.4-170.el8_10 | < 0:2.68.4-16.el9_6.6 | < 0:2.68.4-7.el9_2.6 | < 0:2.68.4-14.el9_4.7 | < 0:2.56.4-158.el8_6.6 | < 0:2.56.4-165.el8_8.1 | < 0:2.56.1-13.el7_9 | < 0:2.56.4-10.el8_4.6 | < 0:2.80.4-4.el10_0.10
  • glib2-debugsource< 0:2.80.4-12.el10_2.14 | < 0:2.68.4-19.el9_8.2 | < 0:2.56.4-170.el8_10 | < 0:2.68.4-16.el9_6.6 | < 0:2.68.4-7.el9_2.6 | < 0:2.68.4-14.el9_4.7 | < 0:2.56.4-158.el8_6.6 | < 0:2.56.4-165.el8_8.1 | < 0:2.56.4-10.el8_4.6 | < 0:2.80.4-4.el10_0.10
  • glib2-devel< 0:2.80.4-12.el10_2.14 | < 0:2.68.4-19.el9_8.2 | < 0:2.56.4-170.el8_10 | < 0:2.68.4-16.el9_6.6 | < 0:2.68.4-7.el9_2.6 | < 0:2.68.4-14.el9_4.7 | < 0:2.56.4-158.el8_6.6 | < 0:2.56.4-165.el8_8.1 | < 0:2.56.1-13.el7_9 | < 0:2.56.4-10.el8_4.6 | < 0:2.80.4-4.el10_0.10
Debian1 product
  • glib2.0All versions (No fix recorded) | < 2.84.4-3~deb13u4 | < 2.88.3-2
Gnome1 product
  • glib< 2.89.0 | < 2.88.1
Ubuntu1 product
  • glib2.0< 2.40.2-0ubuntu1.1+esm8 | < 2.48.2-0ubuntu4.8+esm6 | < 2.56.4-0ubuntu0.18.04.9+esm6 | < 2.64.6-1~ubuntu20.04.9+esm2 | < 2.72.4-0ubuntu2.10 | < 2.80.0-6ubuntu3.9 | All versions (No fix recorded) | < 2.88.0-1ubuntu0.1

4 vendors · 15 products

References

63 links
Show all 63 references