========================================================================== Ubuntu Security Notice USN-8051-1 February 18, 2026
libssh vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in libssh. Software Description: - libssh: A tiny C SSH library Details: It was discovered that libssh clients incorrectly handled the key exchange process. A remote attacker could possibly use this issue to cause libssh clients to crash, resulting in a denial of service. (CVE-2025-8277) It was discovered that the libssh SCP client incorrectly sanitized paths received from servers. A remote attacker could use this issue to cause libssh SCP clients to overwrite files outside of the working directory and possibly execute arbitrary code. (CVE-2026-0964) It was discovered that libssh incorrectly handled parsing configuration files. A local attacker could possibly use this issue to cause libssh to access non-regular files, resulting in a denial of service. (CVE-2026-0965) It was discovered that libssh incorrectly handled the ssh_get_hexa() function. A remote attacker could possibly use this issue to cause libssh to crash, resulting in a denial of service. (CVE-2026-0966) It was discovered that libssh incorrectly handled certain regular expressions. A local attacker could possibly use this issue to cause libssh to consume resources, resulting in a denial of service. (CVE-2026-0967) It was discovered that the libssh SFTP client incorrectly handled certain malformed longname fields. A remote attacker could use this issue to cause libssh SFTP clients to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-0968) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 libssh-4 0.11.2-1ubuntu0.2 Ubuntu 24.04 LTS libssh-4 0.10.6-2ubuntu0.3 Ubuntu 22.04 LTS libssh-4 0.9.6-2ubuntu0.22.04.6 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8051-1 CVE-2025-8277, CVE-2026-0964, CVE-2026-0965, CVE-2026-0966, CVE-2026-0967, CVE-2026-0968 Package Information: https://launchpad.net/ubuntu/+source/libssh/0.11.2-1ubuntu0.2 https://launchpad.net/ubuntu/+source/libssh/0.10.6-2ubuntu0.3 https://launchpad.net/ubuntu/+source/libssh/0.9.6-2ubuntu0.22.04.6
signature.asc
Description: OpenPGP digital signature
