{"id":"CVE-2026-98172","state":"PUBLISHED","title":"smb: client: fix smbd_connection leak on cifs_get_tcp_session() error","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix smbd_connection leak on cifs_get_tcp_session() error\n\nWhen an RDMA connection is successfully established via\nsmbd_get_connection() but cifs_get_tcp_session() later fails (e.g.\nkthread_create() returns an error), the error path frees tcp_ses\nwithout first destroying the smbd_connection.\n\nFix this by calling smbd_destroy() in the out_err cleanup path before\nkfree(tcp_ses).  smbd_destroy() safely handles the case where\nsmbd_conn is NULL, so it can be called unconditionally.","publishedAt":"2026-10-06T08:44:16.721Z","updatedAt":"2026-10-30T12:37:51.075Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"c295f6505aec085d73e8dcea9f648c8af1b9da8c","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"45a97df1b7fe6c1ca5493f8fb5284203991aeeb9","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"3164402c58940ff58a3cecdb026405f07b0253af","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"e3344bb0ff5ec8a276f42239e140f5442841ef23","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"5c908e49d349266dff0c86dda6a05df0ff19b824","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"928edc4bd6a617caabeb575fc13c254d9df623c4","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"b26a3fcf2f1c2cadba400290b639f01395db8fc8","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"e75c96157d45e498970158c8f7373d90102e33b9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/connect.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.16","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/connect.c"]}],"references":["https://git.kernel.org/stable/c/c295f6505aec085d73e8dcea9f648c8af1b9da8c","https://git.kernel.org/stable/c/45a97df1b7fe6c1ca5493f8fb5284203991aeeb9","https://git.kernel.org/stable/c/3164402c58940ff58a3cecdb026405f07b0253af","https://git.kernel.org/stable/c/e3344bb0ff5ec8a276f42239e140f5442841ef23","https://git.kernel.org/stable/c/5c908e49d349266dff0c86dda6a05df0ff19b824","https://git.kernel.org/stable/c/928edc4bd6a617caabeb575fc13c254d9df623c4","https://git.kernel.org/stable/c/b26a3fcf2f1c2cadba400290b639f01395db8fc8","https://git.kernel.org/stable/c/e75c96157d45e498970158c8f7373d90102e33b9"],"weaknesses":[],"ingestedAt":"2026-10-30T12:56:04.490Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98172.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98172","state":"PUBLISHED","datePublished":"2026-10-06T08:44:16.721Z","dateUpdated":"2026-10-30T12:37:51.075Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.322Z"},"containers":{"cna":{"title":"smb: client: fix smbd_connection leak on cifs_get_tcp_session() error","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix smbd_connection leak on cifs_get_tcp_session() error\n\nWhen an RDMA connection is successfully established via\nsmbd_get_connection() but cifs_get_tcp_session() later fails (e.g.\nkthread_create() returns an error), the error path frees tcp_ses\nwithout first destroying the smbd_connection.\n\nFix this by calling smbd_destroy() in the out_err cleanup path before\nkfree(tcp_ses).  smbd_destroy() safely handles the case where\nsmbd_conn is NULL, so it can be called unconditionally."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"c295f6505aec085d73e8dcea9f648c8af1b9da8c","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"45a97df1b7fe6c1ca5493f8fb5284203991aeeb9","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"3164402c58940ff58a3cecdb026405f07b0253af","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"e3344bb0ff5ec8a276f42239e140f5442841ef23","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"5c908e49d349266dff0c86dda6a05df0ff19b824","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"928edc4bd6a617caabeb575fc13c254d9df623c4","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"b26a3fcf2f1c2cadba400290b639f01395db8fc8","versionType":"git"},{"version":"2f8946464b11822169b9f10c7cf58a2440b51d54","status":"affected","lessThan":"e75c96157d45e498970158c8f7373d90102e33b9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/connect.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.16","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/connect.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c295f6505aec085d73e8dcea9f648c8af1b9da8c"},{"url":"https://git.kernel.org/stable/c/45a97df1b7fe6c1ca5493f8fb5284203991aeeb9"},{"url":"https://git.kernel.org/stable/c/3164402c58940ff58a3cecdb026405f07b0253af"},{"url":"https://git.kernel.org/stable/c/e3344bb0ff5ec8a276f42239e140f5442841ef23"},{"url":"https://git.kernel.org/stable/c/5c908e49d349266dff0c86dda6a05df0ff19b824"},{"url":"https://git.kernel.org/stable/c/928edc4bd6a617caabeb575fc13c254d9df623c4"},{"url":"https://git.kernel.org/stable/c/b26a3fcf2f1c2cadba400290b639f01395db8fc8"},{"url":"https://git.kernel.org/stable/c/e75c96157d45e498970158c8f7373d90102e33b9"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:37:51.075Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}