{"id":"CVE-2026-90164","revision":"066e0211c4bd4c9c9385b90335d6896e","records":[{"revision":"066e0211c4bd4c9c9385b90335d6896e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90164","aliases":[],"title":"smb/server: abort initialization when proc setup fails","description":"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.","state":0,"publishedAt":"2026-09-17T16:06:54.504+00:00","modifiedAt":"2026-10-19T08:59:02.709+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/smb/server/misc.h\",\n                        \"fs/smb/server/proc.c\",\n                        \"fs/smb/server/server.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"b38f99c1217ae04753340f0fdcd8f35bf56841dc\",\n                            \"lessThan\": \"fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b38f99c1217ae04753340f0fdcd8f35bf56841dc\",\n                            \"lessThan\": \"db97f3763727d652112ae70038d4e17b3ce277bb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/smb/server/misc.h\",\n                        \"fs/smb/server/proc.c\",\n                        \"fs/smb/server/server.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09","https://git.kernel.org/stable/c/db97f3763727d652112ae70038d4e17b3ce277bb"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90164","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90164","identifiers":["CVE-2026-90164"]},"retained":false,"historicalAffected":[]}],"coverage":[]}