CVE-2026-58014: A flaw was found in GLib

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HIGH 7.3REMOTEWATCHLISTUPGRADEMITIGATE

CVE-2026-58014 is a high-severity flaw (CVSS 7.3) affecting glib, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in GLib. An off-by-one error can occur in the g_key_file_get_locale_string_list function in the gkeyfile.c file when loading a key file with an empty value. This flaw can cause an out-of-bounds access of 1 byte or a denial of service when the out-of-bounds access crosses a page boundary.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-193
Published	2026-06-30
Last modified	2026-10-22

Publisher (CNA): Red Hat, Inc. · Vendor: gnome · redhat

Am I affected?

Timeline

2026-06-30Published CVE record published
2026-10-22 21:17 UTCUpdated Record last modified

gnome glib UPGRADE

Affected: < 2.88.1

Fixed in: 2.88.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy glib || rpm -q glib || glib --version

2. UPGRADE to 2.88.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade glib

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade glib

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

redhat enterprise linux MITIGATE

Affected: 6.0 · 7.0 · 8.0 · 9.0 · 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · python-streamlink · FIXED · 8.6.2-1.fc46 · FEDORA-2026-a56fcfdc08 · source

sudo dnf upgrade --advisory=FEDORA-2026-a56fcfdc08

Fedora ELN · valgrind · FIXED · 3.28.0-1.eln159 · FEDORA-2026-c593ef1d15 · source

sudo dnf upgrade --advisory=FEDORA-2026-c593ef1d15

Ubuntu 20.04 · glib2.0 · FIXED · 2.64.6-1~ubuntu20.04.9+esm2

sudo apt update && sudo apt install --only-upgrade glib2.0 dpkg --compare-versions "$(dpkg-query -W -f='${Version}' glib2.0)" ge "2.64.6-1~ubuntu20.04.9+esm2" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 22.04 · glib2.0 · FIXED · 2.72.4-0ubuntu2.10

sudo apt update && sudo apt install --only-upgrade glib2.0 dpkg --compare-versions "$(dpkg-query -W -f='${Version}' glib2.0)" ge "2.72.4-0ubuntu2.10" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 24.04 · glib2.0 · FIXED · 2.80.0-6ubuntu3.9

sudo apt update && sudo apt install --only-upgrade glib2.0 dpkg --compare-versions "$(dpkg-query -W -f='${Version}' glib2.0)" ge "2.80.0-6ubuntu3.9" && echo PATCHED || echo STILL-VULNERABLE

Debian 12 · glib2.0 · NO FIX YET

Debian 13 · glib2.0 · FIXED · 2.84.4-3~deb13u4

sudo apt update && sudo apt install --only-upgrade glib2.0 dpkg --compare-versions "$(dpkg-query -W -f='${Version}' glib2.0)" ge "2.84.4-3~deb13u4" && echo PATCHED || echo STILL-VULNERABLE

RHEL 10 · glib2 · FIXED · glib2-2.80.4-12.el10_2.21

sudo dnf upgrade --advisory=RHSA-2026:57015 rpm -q glib2

RHEL 10.0 Extended Update Support · glib2 · FIXED · glib2-2.80.4-4.el10_0.17

sudo dnf upgrade --advisory=RHSA-2026:65767 rpm -q glib2

RHEL 7 Extended Lifecycle Support · glib2 · FIXED · glib2-2.56.1-13.el7_9.1

sudo dnf upgrade --advisory=RHSA-2026:65773 rpm -q glib2

RHEL 8 · mingw-glib2 · FIXED · mingw-glib2-2.70.1-9.el8_10

sudo dnf upgrade --advisory=RHSA-2026:49512 rpm -q mingw-glib2

RHEL 8 · glib2 · FIXED · glib2-2.56.4-177.el8_10

sudo dnf upgrade --advisory=RHSA-2026:61766 rpm -q glib2

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2026-1942 · source

sudo dnf update --advisory=ALAS2023-2026-1942

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Related CVEs

CVE-2026-58015 MEDIUM 5.9 UPGRADE MITIGATE A flaw was found in GLib

References

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