{"id":"openSUSE-SU-2026:21444-1","summary":"Security update for libssh","details":"This update for libssh fixes the following issues:\n\n- CVE-2026-15370: stack buffer overflow in SFTP server longname construction (bsc#1272162).\n- CVE-2026-59843: denial of service via zero advertised channel packet size (bsc#1272164).\n- CVE-2026-59844: denial of service via oversized SFTP read length (bsc#1272165).\n- CVE-2026-59845: denial of service via unchecked ProxyCommand fork() failure (bsc#1272166).\n- CVE-2026-59846: information disclosure via ProxyCommand %r username expansion (bsc#1272167).\n- CVE-2026-59847: integrity downgrade via OpenSSL AES-GCM tag verification (bsc#1272168).\n- CVE-2026-59848: denial of service via SFTP responses with unknown request IDs (bsc#1272169).\n- CVE-2026-59849: denial of service via automatic certificate authentication loop (bsc#1272170).\n- CVE-2026-59850: use-after-free via data callbacks on closed channels (bsc#1272171).\n\nChanges for libssh:\n\n- Update to 0.11.5:\n\n * Zero-initialize every ssh_string\n * Fix compatibility with C23 / gcc16\n * Fix multiple memory leaks, null checks, and error checks\n * Validate peer public key in DH key exchange\n * Avoid remote window overflow\n * Avoid off-by-one overflow during kbdint authentication\n * Avoid logging uninitialized sequence numbers\n * Avoid double conversion of SFTP version number\n * Send correct SFTP server version number\n * Avoid handling repeated SFTP INIT messages\n * Harmonize return values from SFTP server callbacks\n\n- Update %suse_version checks for SLES 16.x (jsc#PED-15815)\n","modified":"2026-07-26T18:24:14.496076071Z","published":"2026-07-25T17:18:11Z","related":["CVE-2026-15370","CVE-2026-59843","CVE-2026-59844","CVE-2026-59845","CVE-2026-59846","CVE-2026-59847","CVE-2026-59848","CVE-2026-59849","CVE-2026-59850"],"upstream":["CVE-2026-15370","CVE-2026-59843","CVE-2026-59844","CVE-2026-59845","CVE-2026-59846","CVE-2026-59847","CVE-2026-59848","CVE-2026-59849","CVE-2026-59850"],"references":[{"type":"ADVISORY"},{"type":"REPORT","url":"https://bugzilla.suse.com/1272162"},{"type":"REPORT","url":"https://bugzilla.suse.com/1272164"},{"type":"REPORT","url":"https://bugzilla.suse.com/1272165"},{"type":"REPORT","url":"https://bugzilla.suse.com/1272166"},{"type":"REPORT","url":"https://bugzilla.suse.com/1272167"},{"type":"REPORT","url":"https://bugzilla.suse.com/1272168"},{"type":"REPORT","url":"https://bugzilla.suse.com/1272169"},{"type":"REPORT","url":"https://bugzilla.suse.com/1272170"},{"type":"REPORT","url":"https://bugzilla.suse.com/1272171"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-15370"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-59843"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-59844"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-59845"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-59846"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-59847"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-59848"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-59849"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-59850"}],"affected":[{"package":{"name":"libssh","ecosystem":"openSUSE:Leap 16.0","purl":"pkg:rpm/opensuse/libssh&distro=openSUSE%20Leap%2016.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.11.5-160000.1.1"}]}],"ecosystem_specific":{"binaries":[{"libssh-devel":"0.11.5-160000.1.1","libssh4":"0.11.5-160000.1.1","libssh-config":"0.11.5-160000.1.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/openSUSE-SU-2026:21444-1.json"}}],"schema_version":"1.7.5"}