A memory handling flaw (CVE-2025-9900, CVSS 8.8 HIGH) in the LibTIFF library bundled with Texmaker allows an attacker to cause a denial of service, information disclosure, or arbitrary code execution by tricking a user into parsing a specially crafted TIFF image. The vulnerability affects Texmaker packages in Ubuntu 18.04 LTS through 24.04 LTS. The issue is corrected by updating to the specific `texmaker` and `texmaker-data` package versions listed in USN-8346-1, with fixes currently available via Ubuntu Pro's ESM service.
Ubuntu Security Notices USN-8346-1 USN-8346-1: Texmaker vulnerabilities Publication date 28 May 2026 Overview Texmaker could be made to crash or run programs if it received specially crafted input. Releases 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Related notices Packages texmaker - Free cross-platform LaTeX editor Details It was discovered that the vendored LibTIFF in Texmaker incorrectly handled memory when parsing malformed TIFF image metadata. An attacker could possibly use this issue to cause a denial of service, obtain sensitive information, or execute arbitrary code. It was discovered that the vendored LibTIFF in Texmaker incorrectly handled memory when parsing malformed TIFF image metadata. An attacker could possibly use this issue to cause a denial of service, obtain sensitive information, or execute arbitrary code. Update instructions In general, a standard system update will make all the necessary changes. Learn more about how to get the fixes. The problem can be corrected by updating your system to the following package versions: Ubuntu Release Package Version 24.04 LTS noble texmaker – 5.1.3+dfsg-1ubuntu0.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. texmaker-data – 5.1.3+dfsg-1ubuntu0.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. 22.04 LTS jammy texmaker – 5.0.3-1ubuntu0.22.04.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. texmaker-data – 5.0.3-1ubuntu0.22.04.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. 20.04 LTS focal texmaker – 5.0.3-1ubuntu0.20.04.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. texmaker-data – 5.0.3-1ubuntu0.20.04.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. 18.04 LTS bionic texmaker – 5.0.2-1ubuntu0.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. texmaker-data – 5.0.2-1ubuntu0.1~esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. Get Ubuntu Pro References CVE-2025-9900 CVE-2025-9900 Related notices USN-8347-1 USN-8345-1 USN-7783-1 USN-8347-1 USN-8345-1 USN-7783-1