CVE-2026-58010
Undergoing Analysis Undergoing Analysis - In Progress

Out-of-Bounds Read in GLib Library

Publication date: 2026-06-30

Last updated on: 2026-06-30

Assigner: Red Hat, Inc.

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.

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Meta Information

Published
2026-06-30
Last Modified
2026-06-30
Generated
2026-06-30
AI Q&A
2026-06-30
EPSS Evaluated
N/A
NVD
CVE-2026-58010
EUVD
EUVD-2026-40312

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gnome glib From 2.68.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-126 The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

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Compliance Impact

The provided information does not specify how this vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

This vulnerability is an off-by-one error found in the GLib library, specifically in the gvs_tuple_is_normal function within the glib/gvariant-serialiser.c file. The issue arises because the bounds check uses a greater-than (>) operator instead of a greater-than-or-equal-to (>=) operator during an alignment padding check. This causes an out-of-bounds read of 1 byte.

Impact Analysis

The vulnerability can lead to a minor information disclosure of 1 byte and potentially cause a denial of service if the out-of-bounds read crosses a memory page boundary.

Mitigation Strategies

The vulnerability is due to an off-by-one error in the GLib library's gvs_tuple_is_normal function causing an out-of-bounds read. Immediate mitigation steps would typically involve updating or patching the GLib library to a fixed version once available.

Since the issue affects all Linux systems using GLib, ensure your system packages are up to date and monitor Red Hat Bugzilla or your distribution's security advisories for patches related to Bug 2492243.

Detection Guidance

There is no specific information provided about detection methods or commands to identify this vulnerability on a network or system.

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