{"api_version":"1","generated_at":"2026-09-21T11:38:08+00:00","cve":"CVE-2026-90164","urls":{"html":"https://cve.report/CVE-2026-90164","api":"https://cve.report/api/cve/CVE-2026-90164.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90164","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90164"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:09","updated_at":"2026-09-17 17:17:09"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09","name":"https://git.kernel.org/stable/c/fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/db97f3763727d652112ae70038d4e17b3ce277bb","name":"https://git.kernel.org/stable/c/db97f3763727d652112ae70038d4e17b3ce277bb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90164","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90164","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b38f99c1217ae04753340f0fdcd8f35bf56841dc fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b38f99c1217ae04753340f0fdcd8f35bf56841dc db97f3763727d652112ae70038d4e17b3ce277bb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/server/misc.h","fs/smb/server/proc.c","fs/smb/server/server.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09","status":"affected","version":"b38f99c1217ae04753340f0fdcd8f35bf56841dc","versionType":"git"},{"lessThan":"db97f3763727d652112ae70038d4e17b3ce277bb","status":"affected","version":"b38f99c1217ae04753340f0fdcd8f35bf56841dc","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/server/misc.h","fs/smb/server/proc.c","fs/smb/server/server.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.0"},{"lessThan":"7.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"7.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"7.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:06:54.504Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09"},{"url":"https://git.kernel.org/stable/c/db97f3763727d652112ae70038d4e17b3ce277bb"}],"title":"smb/server: abort initialization when proc setup fails","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90164","datePublished":"2026-09-17T16:06:54.504Z","dateReserved":"2026-09-11T19:38:34.790Z","dateUpdated":"2026-09-17T16:06:54.504Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:09","lastModifiedDate":"2026-09-17 17:17:09","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90164","Ordinal":"1","Title":"smb/server: abort initialization when proc setup fails","CVE":"CVE-2026-90164","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90164","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"smb/server: abort initialization when proc setup fails"}]}}}