{"id":"CVE-2022-50243","summary":"sctp: handle the error returned from sctp_auth_asoc_init_active_key","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: handle the error returned from sctp_auth_asoc_init_active_key\n\nWhen it returns an error from sctp_auth_asoc_init_active_key(), the\nactive_key is actually not updated. The old sh_key will be freeed\nwhile it's still used as active key in asoc. Then an use-after-free\nwill be triggered when sending patckets, as found by syzbot:\n\n  sctp_auth_shkey_hold+0x22/0xa0 net/sctp/auth.c:112\n  sctp_set_owner_w net/sctp/socket.c:132 [inline]\n  sctp_sendmsg_to_asoc+0xbd5/0x1a20 net/sctp/socket.c:1863\n  sctp_sendmsg+0x1053/0x1d50 net/sctp/socket.c:2025\n  inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819\n  sock_sendmsg_nosec net/socket.c:714 [inline]\n  sock_sendmsg+0xcf/0x120 net/socket.c:734\n\nThis patch is to fix it by not replacing the sh_key when it returns\nerrors from sctp_auth_asoc_init_active_key() in sctp_auth_set_key().\nFor sctp_auth_set_active_key(), old active_key_id will be set back\nto asoc-\u003eactive_key_id when the same thing happens.","modified":"2026-04-02T08:28:20.890749Z","published":"2025-09-15T14:01:52.101Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50243.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/022152aaebe116a25c39818a07e175a8cd3c1e11"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0f90099d18e3abdc01babf686f41f63fe04939c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/19d636b663e0e92951bba5fced929ca7fd25c552"},{"type":"WEB","url":"https://git.kernel.org/stable/c/382ff44716603a54f5fd238ddec6a2468e217612"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f65955340e0044f5c41ac799a01698ac7dee8a4e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50243.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50243"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"50b57223da67653c61e405d0a7592355cfe4585e"},{"fixed":"b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b60461696a0b0fdaf240bc365b7983698f88ded2"},{"fixed":"382ff44716603a54f5fd238ddec6a2468e217612"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8eb225873246312660ccd68296959a7b213d0cdd"},{"fixed":"f65955340e0044f5c41ac799a01698ac7dee8a4e"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"58acd10092268831e49de279446c314727101292"},{"fixed":"19d636b663e0e92951bba5fced929ca7fd25c552"},{"fixed":"0f90099d18e3abdc01babf686f41f63fe04939c1"},{"fixed":"3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d"},{"fixed":"022152aaebe116a25c39818a07e175a8cd3c1e11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"c1de376423a7759bf4fa25d6a038a4c1e035c9e1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50243.json"}}],"schema_version":"1.7.5"}