{"id":"USN-8093-2","summary":"libssh vulnerability","details":"USN-8093-1 fixed a vulnerability in libssh. This update provides\nthe corresponsing fix for Ubuntu 26.04 LTS.\n\nOriginal advisory details:\n\n It was discovered that libssh incorrectly performed bounds checking when\n processing SFTP extensions. If a client application queried extension data out\n of bounds, it could cause the application to crash, resulting in a denial of\n service, or exhibit unintended behavior.","modified":"2026-08-19T19:30:09.112904161Z","published":"2026-08-19T08:15:33Z","related":["UBUNTU-CVE-2026-3731"],"upstream":["CVE-2026-3731","UBUNTU-CVE-2026-3731"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8093-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-3731"}],"affected":[{"package":{"name":"libssh","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libssh?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.11.3-1ubuntu2"}]}],"versions":["0.11.2-1build1","0.11.3-1","0.11.3-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.11.3-1ubuntu2","binary_name":"libssh-4"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:26.04:LTS","cves":[{"id":"CVE-2026-3731","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8093-2.json"}}],"schema_version":"1.9.0"}