RHSA-2026:11004

Vulnerability from csaf_redhat - Published: 2026-04-27 18:40 - Updated: 2026-04-27 19:45
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Low
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: expat: * expat-2.8.0-0.1.hum1 (aarch64, x86_64) * expat-devel-2.8.0-0.1.hum1 (aarch64, x86_64) * expat-static-2.8.0-0.1.hum1 (aarch64, x86_64) * expat-2.8.0-0.1.hum1.src (src)
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.
CVE-2026-41080

A flaw was found in libexpat. A remote attacker could exploit this vulnerability by providing a specially crafted XML document that leverages insufficient entropy in the hash function. This can lead to hash flooding, a type of Denial of Service (DoS) attack, where the system becomes unresponsive or crashes due to excessive resource consumption.

3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-331 - Insufficient Entropy
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:11004
Workaround Applications that process untrusted XML documents using libexpat should implement robust input validation to filter out malicious XML structures. Restricting access to services that process untrusted XML can also reduce the attack surface. If a service is affected, restarting it may be required after implementing input validation or access restrictions.
References
To clipboard 

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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
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      "title": "libexpat: expat: libexpat: Denial of Service via hash flooding with crafted XML"
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}


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