RHSA-2026:42329
Vulnerability from csaf_redhat - Published: 2026-07-20 23:31 - Updated: 2026-07-21 11:06Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Moderate
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
glib2:
* glib2-2.89.2-2.hum1 (aarch64, x86_64)
* glib2-devel-2.89.2-2.hum1 (aarch64, x86_64)
* glib2-doc-2.89.2-2.hum1 (aarch64, x86_64)
* glib2-static-2.89.2-2.hum1 (aarch64, x86_64)
* glib2-tests-2.89.2-2.hum1 (aarch64, x86_64)
* glib2-2.89.2-2.hum1.src (src)
Security Fix(es):
glib2:
* CVE-2026-15588
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A denial-of-service and resource exhaustion vulnerability exists within the `GDBus` component of GLib. The `gdbusauth` authentication mechanism fails to enforce proper length limitations on data lines read from a client. An unauthenticated local or remote attacker can exploit this lack of input validation by sending excessively long streams of data, causing the application to consume massive amounts of system memory and CPU, potentially leading to a crash or system hang.
5.3 (Medium)
Affected products
Fixed
3 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:glib2-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:glib2-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:glib2-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
References
10 references
Acknowledgments
Gitee Codepecker Lab
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"text": "This update includes the following RPMs:\n\nglib2:\n * glib2-2.89.2-2.hum1 (aarch64, x86_64)\n * glib2-devel-2.89.2-2.hum1 (aarch64, x86_64)\n * glib2-doc-2.89.2-2.hum1 (aarch64, x86_64)\n * glib2-static-2.89.2-2.hum1 (aarch64, x86_64)\n * glib2-tests-2.89.2-2.hum1 (aarch64, x86_64)\n * glib2-2.89.2-2.hum1.src (src)\n\nSecurity Fix(es):\n\nglib2:\n * CVE-2026-15588",
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"cve": "CVE-2026-15588",
"cwe": {
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"name": "Allocation of Resources Without Limits or Throttling"
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"discovery_date": "2026-07-13T00:00:00+00:00",
"ids": [
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"text": "2499675"
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"notes": [
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"category": "description",
"text": "A denial-of-service and resource exhaustion vulnerability exists within the `GDBus` component of GLib. The `gdbusauth` authentication mechanism fails to enforce proper length limitations on data lines read from a client. An unauthenticated local or remote attacker can exploit this lack of input validation by sending excessively long streams of data, causing the application to consume massive amounts of system memory and CPU, potentially leading to a crash or system hang.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "GDBusServer: glib2: GDBusServer pre-authentication DoS via unbounded SASL line buffering",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A flaw was found in the `GDBus` component of GLib. A local or remote unauthenticated attacker could send an engineered stream of data without line length limitations during the authentication process (`gdbusauth`), leading to excessive memory allocation and CPU consumption. This resource exhaustion can result in a denial-of-service (DoS) condition, causing applications or services dependent on GLib to become unstable or crash.",
"title": "Statement"
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{
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{
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"summary": "https://gitlab.gnome.org/GNOME/glib/-/issues/3985",
"url": "https://gitlab.gnome.org/GNOME/glib/-/issues/3985"
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"release_date": "2026-07-12T10:10:00+00:00",
"remediations": [
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"category": "vendor_fix",
"date": "2026-07-20T23:31:17+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
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"scores": [
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"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:glib2-main@aarch64",
"Red Hat Hardened Images:glib2-main@src",
"Red Hat Hardened Images:glib2-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "GDBusServer: glib2: GDBusServer pre-authentication DoS via unbounded SASL line buffering"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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