RHSA-2026:61766: Moderate: glib2 security update
GLib provides the core application building blocks for libraries and applications written in C. It provides the core object system used in GNOME, the main loop implementation, and a large set of utility functions for strings and common data structures.Security Fix(es): glib: buffer over-read in glib/gvariant-serialiser.c via gvstupleisnormal() (CVE-2026-58010) glib: out-of-bounds read in glib/gdatetime.c:gdatetimegetymd via invalid GDateTime (CVE-2026-58011) glib: buffer over-read in gregexreplace() via glib/gregex.c:stringappend() and gutf8nextchar() (CVE-2026-58012) glib: buffer over-read in glib/giochannel.c via "giochannelreadlinebackend" (CVE-2026-58013) glib: off-by-one error in glib/gkeyfile.c via "gkeyfilegetlocalestringlist" (CVE-2026-58014) glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyringlookupentry and mechanismclientdatareceive (CVE-2026-58015) GDBusServer: glib2: GDBusServer pre-authentication DoS via unbounded SASL line buffering (CVE-2026-15588) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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redhat/glib2to a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10 - Upgrade
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redhat/glib2-debuginfoto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10 - Upgrade
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redhat/glib2-debugsourceto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10 - Upgrade
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redhat/glib2-develto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10 - Upgrade
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redhat/glib2-devel-debuginfoto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10 - Upgrade
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redhat/glib2-famto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10 - Upgrade
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redhat/glib2-fam-debuginfoto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10 - Upgrade
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redhat/glib2-teststo a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10 - Upgrade
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redhat/glib2-tests-debuginfoto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10 - Upgrade
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redhat/glib2to a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10.aa - Upgrade
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redhat/glib2-debuginfoto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10.aa - Upgrade
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redhat/glib2-debugsourceto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10.aa - Upgrade
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redhat/glib2-develto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10.aa - Upgrade
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redhat/glib2-devel-debuginfoto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10.aa - Upgrade
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redhat/glib2-famto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10.aa - Upgrade
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redhat/glib2-fam-debuginfoto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10.aa - Upgrade
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redhat/glib2-teststo a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10.aa - Upgrade
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redhat/glib2-tests-debuginfoto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10.aa - Upgrade
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redhat/glib2-docto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10 - Upgrade
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redhat/glib2-staticto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10 - Upgrade
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redhat/glib2-staticto a version that resolves this vulnerability.Fixed in 2.56.4-177.el8_10.aa
Event History
Frequently Asked Questions
Which installed packages are covered by this advisory?
The advisory covers redhat/glib2 and related packages: glib2-debuginfo, glib2-debugsource, glib2-devel, glib2-devel-debuginfo, glib2-fam, glib2-fam-debuginfo, and glib2-tests.
Is there an issue that can affect a GDBusServer before authentication completes?
Yes. CVE-2026-15588 is a pre-authentication denial-of-service issue in GDBusServer caused by unbounded SASL line buffering.
Do any of the listed fixes involve filesystem path handling?
Yes. CVE-2026-58015 is a path-traversal issue in GLib's GDBus authentication mechanism, involving keyring_lookup_entry and mechanism_client_data_receive.