{"id":"CVE-2026-23228","state":"PUBLISHED","title":"smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()\n\nOn kthread_run() failure in ksmbd_tcp_new_connection(), the transport is\nfreed via free_transport(), which does not decrement active_num_conn,\nleaking this counter.\n\nReplace free_transport() with ksmbd_tcp_disconnect().","publishedAt":"2026-02-18T14:53:31.882Z","updatedAt":"2026-06-02T13:01:03.442Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4210c3555db4b38bade92331b153e583261f05f9","status":"affected","lessThan":"6dd2645cf080a75be31fa66063c7332b291f46f0","versionType":"git"},{"version":"d5d7847e57ac69fa99c18b363a34419bcdb5a281","status":"affected","lessThan":"7ddd69cd1338c6197e1b6b19cec60d99c8633e4f","versionType":"git"},{"version":"0d0d4680db22eda1eea785c47bbf66a9b33a8b16","status":"affected","lessThan":"787769c8cc50416af7b8b1a36e6bcd6aaa7680aa","versionType":"git"},{"version":"0d0d4680db22eda1eea785c47bbf66a9b33a8b16","status":"affected","lessThan":"baf664fc90a6139a39a58333e4aaa390c10d45dc","versionType":"git"},{"version":"0d0d4680db22eda1eea785c47bbf66a9b33a8b16","status":"affected","lessThan":"cd25e0d809531a67e9dd53b19012d27d2b13425f","versionType":"git"},{"version":"0d0d4680db22eda1eea785c47bbf66a9b33a8b16","status":"affected","lessThan":"599271110c35f6b16e2e4e45b9fbd47ed378c982","versionType":"git"},{"version":"0d0d4680db22eda1eea785c47bbf66a9b33a8b16","status":"affected","lessThan":"77ffbcac4e569566d0092d5f22627dfc0896b553","versionType":"git"},{"version":"5.15.91","status":"affected","lessThan":"5.15.201","versionType":"semver"},{"version":"6.1.9","status":"affected","lessThan":"6.1.164","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/transport_tcp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"5.15.201","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.164","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.125","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.72","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.11","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.1","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/transport_tcp.c"]}],"references":["https://git.kernel.org/stable/c/6dd2645cf080a75be31fa66063c7332b291f46f0","https://git.kernel.org/stable/c/7ddd69cd1338c6197e1b6b19cec60d99c8633e4f","https://git.kernel.org/stable/c/787769c8cc50416af7b8b1a36e6bcd6aaa7680aa","https://git.kernel.org/stable/c/baf664fc90a6139a39a58333e4aaa390c10d45dc","https://git.kernel.org/stable/c/cd25e0d809531a67e9dd53b19012d27d2b13425f","https://git.kernel.org/stable/c/599271110c35f6b16e2e4e45b9fbd47ed378c982","https://git.kernel.org/stable/c/77ffbcac4e569566d0092d5f22627dfc0896b553","https://cert-portal.siemens.com/productcert/html/ssa-253495.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23228.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23228","state":"PUBLISHED","datePublished":"2026-02-18T14:53:31.882Z","dateUpdated":"2026-06-02T13:01:03.442Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.988Z"},"containers":{"cna":{"title":"smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()\n\nOn kthread_run() failure in ksmbd_tcp_new_connection(), the transport is\nfreed via free_transport(), which does not decrement active_num_conn,\nleaking this counter.\n\nReplace free_transport() with ksmbd_tcp_disconnect()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4210c3555db4b38bade92331b153e583261f05f9","status":"affected","lessThan":"6dd2645cf080a75be31fa66063c7332b291f46f0","versionType":"git"},{"version":"d5d7847e57ac69fa99c18b363a34419bcdb5a281","status":"affected","lessThan":"7ddd69cd1338c6197e1b6b19cec60d99c8633e4f","versionType":"git"},{"version":"0d0d4680db22eda1eea785c47bbf66a9b33a8b16","status":"affected","lessThan":"787769c8cc50416af7b8b1a36e6bcd6aaa7680aa","versionType":"git"},{"version":"0d0d4680db22eda1eea785c47bbf66a9b33a8b16","status":"affected","lessThan":"baf664fc90a6139a39a58333e4aaa390c10d45dc","versionType":"git"},{"version":"0d0d4680db22eda1eea785c47bbf66a9b33a8b16","status":"affected","lessThan":"cd25e0d809531a67e9dd53b19012d27d2b13425f","versionType":"git"},{"version":"0d0d4680db22eda1eea785c47bbf66a9b33a8b16","status":"affected","lessThan":"599271110c35f6b16e2e4e45b9fbd47ed378c982","versionType":"git"},{"version":"0d0d4680db22eda1eea785c47bbf66a9b33a8b16","status":"affected","lessThan":"77ffbcac4e569566d0092d5f22627dfc0896b553","versionType":"git"},{"version":"5.15.91","status":"affected","lessThan":"5.15.201","versionType":"semver"},{"version":"6.1.9","status":"affected","lessThan":"6.1.164","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/transport_tcp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"5.15.201","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.164","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.125","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.72","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.11","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.1","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/transport_tcp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6dd2645cf080a75be31fa66063c7332b291f46f0"},{"url":"https://git.kernel.org/stable/c/7ddd69cd1338c6197e1b6b19cec60d99c8633e4f"},{"url":"https://git.kernel.org/stable/c/787769c8cc50416af7b8b1a36e6bcd6aaa7680aa"},{"url":"https://git.kernel.org/stable/c/baf664fc90a6139a39a58333e4aaa390c10d45dc"},{"url":"https://git.kernel.org/stable/c/cd25e0d809531a67e9dd53b19012d27d2b13425f"},{"url":"https://git.kernel.org/stable/c/599271110c35f6b16e2e4e45b9fbd47ed378c982"},{"url":"https://git.kernel.org/stable/c/77ffbcac4e569566d0092d5f22627dfc0896b553"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T16:04:17.653Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.91","versionEndExcluding":"5.15.201"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.9","versionEndExcluding":"6.1.164"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.125"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.12.72"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.18.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.19.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"RUGGEDCOM RST2428P","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"V4.0","versionType":"custom"}]}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-253495.html"}],"providerMetadata":{"shortName":"siemens-SADP","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","dateUpdated":"2026-06-02T13:01:03.442Z"},"x_adpType":"supplier"}]}}}