{"id":"CVE-2026-90164","summary":"smb/server: abort initialization when proc setup fails","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: abort initialization when proc setup fails\n\nksmbd_server_init() calls ksmbd_proc_init() before creating the\nremaining proc entries and server subsystems. ksmbd_proc_init() tears\ndown partial state on a procfs or percpu_counter allocation failure,\nbut returns void, so ksmbd_server_init() continues as if the counters\nwere usable.\n\nOnce userspace starts the server, server_ctrl_handle_init() calls\nksmbd_proc_reset(), which reaches percpu_counter_set() with a NULL\nper-CPU counters pointer on SMP systems. The later ksmbd_proc_create()\ncalls also receive a NULL parent and may create entries in the /proc\nroot; ksmbd_proc_cleanup() cannot remove those entries because\nksmbd_proc_fs is NULL.","modified":"2026-09-18T03:48:35.855757510Z","published":"2026-09-17T16:06:54.504Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90164.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/db97f3763727d652112ae70038d4e17b3ce277bb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90164.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90164"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b38f99c1217ae04753340f0fdcd8f35bf56841dc"},{"fixed":"fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09"},{"fixed":"db97f3763727d652112ae70038d4e17b3ce277bb"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90164.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90164.json"}}],"schema_version":"1.9.0"}