CVE-2026-58014 — glib
HIGHCVE-2026-58014 is a high-severity (CVSS 7.3) CWE-193 vulnerability. A fix is available — see the affected versions and patch details below.
Glib: off-by-one error in glib/gkeyfile.c via "g_key_file_get_locale_string_list"
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-58014.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2026-58014 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 384,993 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Description
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.
Affected Products
glibgnomeenterprise linuxredhatDetection & mitigation playbook
VulnerabilityDetect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Fix
Upgrade the affected component to the fixed release for CVE-2026-58014, or apply your distribution's backported patch — distro builds are often patched at an older version number, so check your vendor's advisory rather than the upstream version alone.
Workarounds
Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
Any applications loading or parsing untrusted key files, typically .desktop or .ini files, are vulnerable to this issue. This flaw can cause an off-by-one error, leading to an out-of-bounds access of 1 byte or a denial of service when the out-of-bounds access crosses a page boundary. Due to these reasons, this…
To mitigate this vulnerability, implement input validation to sanitize untrusted key files (such as .desktop or .ini files), specifically rejecting or stripping empty values before calling g_key_file_get_locale_string_list(). Alternatively, restricting the application to only load key files from trusted sources will completely neutralize this issue.Source: Red Hat security advisory for CVE-2026-58014 (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Enterprise Linux 10 | glib2-0:2.80.4-12.el10_2.21 | RHSA-2026:57015 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | glib2-0:2.80.4-4.el10_0.17 | RHSA-2026:65767 |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | glib2-0:2.56.1-13.el7_9.1 | RHSA-2026:65773 |
| Red Hat Enterprise Linux 8 | mingw-glib2-0:2.70.1-9.el8_10 | RHSA-2026:49512 |
| Red Hat Enterprise Linux 8 | glib2-0:2.56.4-177.el8_10 | RHSA-2026:61766 |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | glib2-0:2.56.4-10.el8_4.7 | RHSA-2026:65762 |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | glib2-0:2.56.4-158.el8_6.7 | RHSA-2026:65769 |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service | glib2-0:2.56.4-165.el8_8.2 | RHSA-2026:65771 |
Frequently Asked Questions
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