========================================================================== Ubuntu Security Notice USN-8309-1 May 26, 2026
libssh2 vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS Summary: libssh2 could be made to crash if it received specially crafted network traffic. Software Description: - libssh2: Client-side C library implementing the SSH2 protocol Details: It was discovered that libssh2 incorrectly handled username and password length values during SSH password authentication. A remote attacker could possibly use this issue to cause a denial of service. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS libssh2-1t64 1.11.1-1ubuntu0.26.04.1 Ubuntu 25.10 libssh2-1t64 1.11.1-1ubuntu0.25.10.1 Ubuntu 24.04 LTS libssh2-1t64 1.11.0-4.1ubuntu0.24.04.1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8309-1 CVE-2026-7598 Package Information: https://launchpad.net/ubuntu/+source/libssh2/1.11.1-1ubuntu0.26.04.1 https://launchpad.net/ubuntu/+source/libssh2/1.11.1-1ubuntu0.25.10.1 https://launchpad.net/ubuntu/+source/libssh2/1.11.0-4.1ubuntu0.24.04.1
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