RHSA-2026:57015: 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
Upgrade
redhat/glib2to a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21 - Upgrade
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redhat/glib2-debuginfoto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21 - Upgrade
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redhat/glib2-debugsourceto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21 - Upgrade
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redhat/glib2-develto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21 - Upgrade
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redhat/glib2-devel-debuginfoto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21 - Upgrade
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redhat/glib2-teststo a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21 - Upgrade
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redhat/glib2-tests-debuginfoto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21 - Upgrade
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redhat/glib2to a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21.aa - Upgrade
Upgrade
redhat/glib2-debuginfoto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21.aa - Upgrade
Upgrade
redhat/glib2-debugsourceto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21.aa - Upgrade
Upgrade
redhat/glib2-develto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21.aa - Upgrade
Upgrade
redhat/glib2-devel-debuginfoto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21.aa - Upgrade
Upgrade
redhat/glib2-teststo a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21.aa - Upgrade
Upgrade
redhat/glib2-tests-debuginfoto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21.aa - Upgrade
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redhat/glib2-docto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21 - Upgrade
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redhat/glib2-staticto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21 - Upgrade
Upgrade
redhat/glib2-docto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21.aa - Upgrade
Upgrade
redhat/glib2-staticto a version that resolves this vulnerability.Fixed in 2.80.4-12.el10_2.21.aa
Event History
Frequently Asked Questions
Which systems are most relevant to prioritize for this update?
Systems running the listed Red Hat glib2 packages are relevant. Prioritize applications that process untrusted data through GLib, particularly deployments using GDBusServer, because one fix addresses a pre-authentication denial of service.
What attacker interaction is identified for the GDBusServer denial-of-service issue?
The issue is described as a pre-authentication denial of service caused by unbounded SASL line buffering. This indicates the affected GDBusServer component can be targeted before authentication completes.
Are all issues in this update the same type of vulnerability?
No. The update includes multiple buffer or out-of-bounds read issues, an off-by-one error, a path-traversal issue in the D-Bus SHA-1 authentication mechanism, and the GDBusServer pre-authentication denial-of-service issue.