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Vulnerability · Published Jun 30, 2026 · Assigned by redhat

CVE-2026-58010Glib: buffer over-read in glib/gvariant-serialiser.c via gvs_tuple_is_normal()

Medium 6.5

In plain English

A medium-severity security flaw in GLib from GNOME. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.5%top 57.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in GLib. An off-by-one error can occur in the gvs_tuple_is_normal function in the glib/gvariant-serialiser.c file when doing an alignment padding check because the bounds check uses > instead of >=, causing an out-of-bounds read of only 1 byte. This issue can cause a minor information disclosure of 1 byte and a denial of service when the out-of-bounds read crosses a page boundary.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10glib22.80.4-12.el10_2.21ALSA-2026:57015
AlmaLinux:8glib22.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:9glib22.68.4-19.el9_8.9ALSA-2026:55440
AlmaLinux:10glib2-devel2.80.4-12.el10_2.21ALSA-2026:57015
AlmaLinux:8glib2-devel2.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:9glib2-devel2.68.4-19.el9_8.9ALSA-2026:55440
AlmaLinux:10glib2-doc2.80.4-12.el10_2.21ALSA-2026:57015
AlmaLinux:8glib2-doc2.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:9glib2-doc2.68.4-19.el9_8.9ALSA-2026:55440
AlmaLinux:8glib2-fam2.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:10glib2-static2.80.4-12.el10_2.21ALSA-2026:57015
AlmaLinux:8glib2-static2.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:9glib2-static2.68.4-19.el9_8.9ALSA-2026:55440
AlmaLinux:10glib2-tests2.80.4-12.el10_2.21ALSA-2026:57015
AlmaLinux:8glib2-tests2.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:9glib2-tests2.68.4-19.el9_8.9ALSA-2026:55440
AlmaLinux:8mingw32-glib22.70.1-9.el8_10ALSA-2026:49512
AlmaLinux:8mingw32-glib2-static2.70.1-9.el8_10ALSA-2026:49512
AlmaLinux:8mingw64-glib22.70.1-9.el8_10ALSA-2026:49512
AlmaLinux:8mingw64-glib2-static2.70.1-9.el8_10ALSA-2026:49512
Debian:12glib2.0no fix listedDEBIAN-CVE-2026-58010
Debian:13glib2.02.84.4-3~deb13u4DEBIAN-CVE-2026-58010
Debian:14glib2.02.88.1-2DEBIAN-CVE-2026-58010
Rocky Linux:10glib20:2.80.4-12.el10_2.21RLSA-2026:57015
Rocky Linux:8glib20:2.56.4-177.el8_10RLSA-2026:61766
Rocky Linux:9glib20:2.68.4-19.el9_8.9RLSA-2026:55440
Rocky Linux:8mingw-glib20:2.70.1-9.el8_10RLSA-2026:49512
Ubuntu:22.04:LTSglib2.02.72.4-0ubuntu2.10UBUNTU-CVE-2026-58010
Ubuntu:22.04:LTSglib2.02.72.4-0ubuntu2.10USN-8794-1
Ubuntu:24.04:LTSglib2.02.80.0-6ubuntu3.9UBUNTU-CVE-2026-58010
Ubuntu:24.04:LTSglib2.02.80.0-6ubuntu3.9USN-8794-1
Ubuntu:25.10glib2.0no fix listedUBUNTU-CVE-2026-58010
Ubuntu:26.04:LTSglib2.02.88.0-1ubuntu0.1USN-8794-1
Ubuntu:26.04:LTSglib2.02.88.0-1ubuntu0.1UBUNTU-CVE-2026-58010

Affected products (as reported)

VendorProductVersions
GNOME GLib 0 – before 2.86.50 – before 2.88.1
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 see references

Weakness: CWE-126 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

References