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Ubuntu 16.04 Expat Important Denial of Service CVE-2026-41080 USN-8520-1

Expat could be made to crash if it received specially crafted input.. ========================================================================== Ubuntu Security Notice USN-8520-1 July 09, 2026 expat vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS Summary: Expat could be made to crash if it received specially crafted input. Software Description: - expat: XML parsing C library Details: It was discovered that Expat used insufficient entropy when generating hash salt values for its internal hash table. An attacker could use this to craft an XML document that triggers hash flooding, leading to a denial of service. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS libexpat1 2.1.0-7ubuntu0.16.04.5+esm12 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8520-1 CVE-2026-41080 . Update Ubuntu 16.04 LTS to fix Expat denial of service issue due to improper input handling. Critical security patch needed.. Ubuntu Expat Denial of Service Update, Security Notice, XML Parsing C Library, Ubuntu Security Advisory. . LinuxSecurity.com Team

Jul 09, 2026 Ubuntu