{"id":"CVE-2026-90164","title":"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","summary":"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. ks…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= b38f99c1217ae04753340f0fdcd8f35bf56841dc < fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09","Linux >= b38f99c1217ae04753340f0fdcd8f35bf56841dc < db97f3763727d652112ae70038d4e17b3ce277bb","Linux 7.0"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:09.747","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90164","references":[{"url":"https://git.kernel.org/stable/c/db97f3763727d652112ae70038d4e17b3ce277bb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.871Z","epss":0.00189,"epssPercentile":0.0884,"slug":"CVE-2026-90164","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}