{"id":"CLSA-2026-1786092035","summary":"Fix CVE(s): CVE-2026-59850","details":"   * SECURITY UPDATE: use-after-free in channel_rcv_data() when a DATA packet\n     is received on a channel already closed by the remote peer\n     - debian/patches/CVE-2026-59850.patch: reject DATA packets on channels\n       already closed by the remote peer (SSH_CHANNEL_FLAG_CLOSED_REMOTE) in\n       channel_rcv_data(), and additionally drop the callback list in\n       ssh_channel_free() so DATA arriving between a local free and the\n       peer's CLOSE can no longer dispatch callbacks on a released channel,\n       both in src/channels.c\n     - CVE-2026-59850","modified":"2026-10-26T09:31:34.051345438Z","published":"2026-08-07T08:40:44Z","upstream":["CVE-2026-59850"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1786092035.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59850"}],"affected":[{"package":{"name":"libssh-4","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/libssh-4?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.0~20170825.94fa1e38-1ubuntu0.7+tuxcare.els6"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786092035.json"}},{"package":{"name":"libssh-dev","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/libssh-dev?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.0~20170825.94fa1e38-1ubuntu0.7+tuxcare.els6"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786092035.json"}},{"package":{"name":"libssh-doc","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/libssh-doc?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.0~20170825.94fa1e38-1ubuntu0.7+tuxcare.els6"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786092035.json"}},{"package":{"name":"libssh-gcrypt-4","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/libssh-gcrypt-4?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.0~20170825.94fa1e38-1ubuntu0.7+tuxcare.els6"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786092035.json"}},{"package":{"name":"libssh-gcrypt-dev","ecosystem":"TuxCare:Ubuntu:18.04","purl":"pkg:deb/tuxcare/libssh-gcrypt-dev?distro=ubuntu-18.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.0~20170825.94fa1e38-1ubuntu0.7+tuxcare.els6"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786092035.json"}}],"schema_version":"1.9.0"}