[USN-8219-1] UltraJSON vulnerabilities

========================================================================== Ubuntu Security Notice USN-8219-1 April 28, 2026 ujson vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in UltraJSON. Software Description: - ujson: Ultra fast JSON encoder and decoder Details: Cameron Criswell discovered that UltraJSON contained a memory leak that would occur when parsing large integers. An attacker could possibly use this issue to cause UltraJSON to crash, resulting in a denial of service. This issue only affected Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-32874) It was discovered that UltraJSON contained integer overflow/underflow issues when calculating how much memory to reserve for indentation in certain instances. An attacker could possibly use this issue to cause UltraJSON to crash, resulting in a denial of service. (CVE-2026-32875) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS python3-ujson 5.11.0-3ubuntu0.1 Ubuntu 25.10 python3-ujson 5.10.0-1ubuntu0.1 Ubuntu 24.04 LTS python3-ujson 5.9.0-1ubuntu0.1~esm1 Available with Ubuntu Pro Ubuntu 22.04 LTS python3-ujson 5.1.0-1ubuntu0.1~esm2 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8219-1 CVE-2026-32874, CVE-2026-32875 Package Information: https://launchpad.net/ubuntu/+source/ujson/5.11.0-3ubuntu0.1 https://launchpad.net/ubuntu/+source/ujson/5.10.0-1ubuntu0.1