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Critical Vulnerabilities in libxml2 Affecting Multiple Ubuntu Releases

Critical Vulnerabilities in libxml2 Affecting Multiple Ubuntu Releases

First seen 24 Jun 2026, 10:14 UTC • •

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ThreatCluster AI
ThreatCluster •June 25, 2026 at 09:54 UTC
  • •Critical vulnerabilities in libxml2 could lead to denial of service and arbitrary code execution.
  • •Affected Ubuntu versions include 24.04 and 22.04 LTS, requiring immediate updates.
  • •CVE-2026-1757 and CVE-2026-6732 are among the identified vulnerabilities needing attention.

Recent security advisories revealed critical vulnerabilities in libxml2, a GNOME XML library, affecting Ubuntu 24.04 and 22.04 LTS. CVE-2026-1757 and CVE-2026-6732, published on 2026-02-02 and 2026-04-23 respectively, detail issues that could lead to denial of service attacks. Additionally, a new vulnerability discovered by Geoffrey Humphreys allows for potential arbitrary code execution through a use-after-free error. Users of Ubuntu 24.04 and 22.04 are advised to update their systems to mitigate these risks. The vulnerabilities could be exploited by remote attackers using specially crafted XML input. The situation is critical, with patches available for affected versions. Security teams should prioritize these updates to prevent potential exploitation.

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Timeline

2026-02-02
CVE-2026-1757 published
A memory leak vulnerability in libxml2 could lead to denial of service attacks.
Linuxsecurity
2026-04-23
CVE-2026-6732 published
A type confusion vulnerability in libxml2 could allow denial of service through crafted XML documents.
Linuxsecurity
2026-06-22
Ubuntu security notice USN-8460 released
Security issues in libxml2 were addressed, urging users to update their systems.
Linuxsecurity
2026-06-24
Ubuntu security notice USN-8456 released
A critical use-after-free vulnerability in libxml2 was disclosed, affecting multiple Ubuntu versions.
Linuxsecurity

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