Back Linuxsecurity Ubuntu 25.10 Expat Critical DoS Issues USN-8022-1 CVE-2025
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: Several security issues were fixed in Expat. Software Description: - expat: XML parsing C library Details: It was discovered that Expat incorrectly handled memory when parsing certain XML files. An attacker could possibly use this issue to cause a denial of service. This issue was only addressed in Ubuntu 25.10. (CVE-2025-59375) It was discovered that Expat incorrectly handled the initialization of parsers for external entities. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-24515) It was discovered that Expat incorrectly handled integer calculations when allocating memory for XML tags. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-25210)
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: Several security issues were fixed in Expat. Software Description: - expat: XML parsing C library Details: It was discovered that Expat incorrectly handled memory when parsing certain XML files. An attacker could possibly use this issue to cause a denial of service. This issue was only addressed in Ubuntu 25.10. (CVE-2025-59375) It was discovered that Expat incorrectly handled the initialization of parsers for external entities. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-24515) It was discovered that Expat incorrectly handled integer calculations when allocating memory for XML tags. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-25210)
The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 expat 2.7.1-2ubuntu0.2 libexpat1 2.7.1-2ubuntu0.2 Ubuntu 22.04 LTS expat 2.4.7-1ubuntu0.7 libexpat1 2.4.7-1ubuntu0.7 Ubuntu 20.04 LTS expat 2.2.9-1ubuntu0.8+esm1 Available with Ubuntu Pro libexpat1 2.2.9-1ubuntu0.8+esm1 Available with Ubuntu Pro Ubuntu 18.04 LTS expat 2.2.5-3ubuntu0.9+esm3 Available with Ubuntu Pro libexpat1 2.2.5-3ubuntu0.9+esm3 Available with Ubuntu Pro Ubuntu 16.04 LTS expat 2.1.0-7ubuntu0.16.04.5+esm11 Available with Ubuntu Pro lib64expat1 2.1.0-7ubuntu0.16.04.5+esm11 Available with Ubuntu Pro libexpat1 2.1.0-7ubuntu0.16.04.5+esm11 Available with Ubuntu Pro Ubuntu 14.04 LTS expat 2.1.0-4ubuntu1.4+esm11 Available with Ubuntu Pro lib64expat1 2.1.0-4ubuntu1.4+esm11 Available with Ubuntu Pro libexpat1 2.1.0-4ubuntu1.4+esm11 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes.
The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 expat 2.7.1-2ubuntu0.2 libexpat1 2.7.1-2ubuntu0.2 Ubuntu 22.04 LTS expat 2.4.7-1ubuntu0.7 libexpat1 2.4.7-1ubuntu0.7 Ubuntu 20.04 LTS expat 2.2.9-1ubuntu0.8+esm1 Available with Ubuntu Pro libexpat1 2.2.9-1ubuntu0.8+esm1 Available with Ubuntu Pro Ubuntu 18.04 LTS expat 2.2.5-3ubuntu0.9+esm3 Available with Ubuntu Pro libexpat1 2.2.5-3ubuntu0.9+esm3 Available with Ubuntu Pro Ubuntu 16.04 LTS expat 2.1.0-7ubuntu0.16.04.5+esm11 Available with Ubuntu Pro lib64expat1 2.1.0-7ubuntu0.16.04.5+esm11 Available with Ubuntu Pro libexpat1 2.1.0-7ubuntu0.16.04.5+esm11 Available with Ubuntu Pro Ubuntu 14.04 LTS expat 2.1.0-4ubuntu1.4+esm11 Available with Ubuntu Pro lib64expat1 2.1.0-4ubuntu1.4+esm11 Available with Ubuntu Pro libexpat1 2.1.0-4ubuntu1.4+esm11 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes.
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