Ubuntu Security Notices USN-8319-1 USN-8319-1: Libgcrypt vulnerabilities Publication date 27 May 2026 Overview Several security issues were fixed in Libgcrypt. Releases 26.04 LTS 25.10 24.04 LTS 22.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Packages libgcrypt20 - LGPL Crypto library Details It was discovered that Libgcrypt incorrectly handled crafted ECDH ciphertext. An attacker could possibly use this issue to cause Libgcrypt to crash, resulting in a denial of service. ( CVE-2026-41989 ) It was discovered that Libgcrypt incorrectly handled Dilithium signing. An attacker could possibly use this issue to cause Libgcrypt to crash, resulting in a denial of service. This issue only affected Ubuntu 26.04 LTS. ( CVE-2026-41990 ) It was discovered that Libgcrypt incorrectly handled crafted ECDH ciphertext. An attacker could possibly use this issue to cause Libgcrypt to crash, resulting in a denial of service. ( CVE-2026-41989 ) It was discovered that Libgcrypt incorrectly handled Dilithium signing. An attacker could possibly use this issue to cause Libgcrypt to crash, resulting in a denial of service. This issue only affected Ubuntu 26.04 LTS. ( CVE-2026-41990 ) 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 26.04 LTS resolute libgcrypt20 – 1.12.0-2ubuntu0.1 25.10 questing libgcrypt20 – 1.11.0-7ubuntu0.1 24.04 LTS noble libgcrypt20 – 1.10.3-2ubuntu0.1 22.04 LTS jammy libgcrypt20 – 1.9.4-3ubuntu3.2 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-2026-41990 CVE-2026-41989 CVE-2026-41990 CVE-2026-41989