{"id":"CVE-2026-90152","state":"PUBLISHED","title":"smb/server: fix session leak in ksmbd_session_register()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: fix session leak in ksmbd_session_register()\n\nSee the procedure below:\n\n  smb2_sess_setup\n    ksmbd_smb2_session_create\n      __session_create\n        atomic_set(&sess->refcnt, 2)\n        hash_add(sessions_table, &sess->hlist, sess->id)\n    ksmbd_session_register\n      xa_store(&conn->sessions, sess->id, sess) // fail\n    ksmbd_user_session_put\n      atomic_dec(&sess->refcnt) // refcnt is 1, session is not freed\n\nRemove the session from sessions_table and drop its table reference if\nxa_store() fails.","publishedAt":"2026-09-17T16:06:45.641Z","updatedAt":"2026-10-30T12:34:25.965Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f623f627ad2b1dc215ab3b0df53fb05cfd3a1c3b","status":"affected","lessThan":"869807cdd5599c289c21d40f36a504d72a0d23c6","versionType":"git"},{"version":"f5c779b7ddbda30866cf2a27c63e34158f858c73","status":"affected","lessThan":"988f99bfddda4e2d1da5f6e98b237dd85e123cee","versionType":"git"},{"version":"f5c779b7ddbda30866cf2a27c63e34158f858c73","status":"affected","lessThan":"03a22a003f41b182245e6c71fe565e277cff7094","versionType":"git"},{"version":"f5c779b7ddbda30866cf2a27c63e34158f858c73","status":"affected","lessThan":"b967a595fb735d313a8676b2ca6a4cba38506482","versionType":"git"},{"version":"f5c779b7ddbda30866cf2a27c63e34158f858c73","status":"affected","lessThan":"55c677619084f9c9fa4146d933cc8ccafc924c87","versionType":"git"},{"version":"f5c779b7ddbda30866cf2a27c63e34158f858c73","status":"affected","lessThan":"99b25b046e47e4904373cfeb445c5483f1633d88","versionType":"git"},{"version":"708c304b583d789957399dd8237f212cf8ad1e4d","status":"affected","versionType":"git"},{"version":"d270631c21e68fb8016d6e231d022d7023a2df6f","status":"affected","versionType":"git"},{"version":"02f41d88f15d6b7d523e52cc3f87488f57e9265b","status":"affected","versionType":"git"},{"version":"6.1.29","status":"affected","lessThan":"6.1.191","versionType":"semver"},{"version":"5.15.145","status":"affected","lessThan":"5.16","versionType":"semver"},{"version":"6.2.16","status":"affected","lessThan":"6.3","versionType":"semver"},{"version":"6.3.2","status":"affected","lessThan":"6.4","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/mgmt/user_session.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","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/server/mgmt/user_session.c"]}],"references":["https://git.kernel.org/stable/c/869807cdd5599c289c21d40f36a504d72a0d23c6","https://git.kernel.org/stable/c/988f99bfddda4e2d1da5f6e98b237dd85e123cee","https://git.kernel.org/stable/c/03a22a003f41b182245e6c71fe565e277cff7094","https://git.kernel.org/stable/c/b967a595fb735d313a8676b2ca6a4cba38506482","https://git.kernel.org/stable/c/55c677619084f9c9fa4146d933cc8ccafc924c87","https://git.kernel.org/stable/c/99b25b046e47e4904373cfeb445c5483f1633d88"],"weaknesses":[],"ingestedAt":"2026-10-30T12:54:04.478Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90152.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90152","state":"PUBLISHED","datePublished":"2026-09-17T16:06:45.641Z","dateUpdated":"2026-10-30T12:34:25.965Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.789Z"},"containers":{"cna":{"title":"smb/server: fix session leak in ksmbd_session_register()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: fix session leak in ksmbd_session_register()\n\nSee the procedure below:\n\n  smb2_sess_setup\n    ksmbd_smb2_session_create\n      __session_create\n        atomic_set(&sess->refcnt, 2)\n        hash_add(sessions_table, &sess->hlist, sess->id)\n    ksmbd_session_register\n      xa_store(&conn->sessions, sess->id, sess) // fail\n    ksmbd_user_session_put\n      atomic_dec(&sess->refcnt) // refcnt is 1, session is not freed\n\nRemove the session from sessions_table and drop its table reference if\nxa_store() fails."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f623f627ad2b1dc215ab3b0df53fb05cfd3a1c3b","status":"affected","lessThan":"869807cdd5599c289c21d40f36a504d72a0d23c6","versionType":"git"},{"version":"f5c779b7ddbda30866cf2a27c63e34158f858c73","status":"affected","lessThan":"988f99bfddda4e2d1da5f6e98b237dd85e123cee","versionType":"git"},{"version":"f5c779b7ddbda30866cf2a27c63e34158f858c73","status":"affected","lessThan":"03a22a003f41b182245e6c71fe565e277cff7094","versionType":"git"},{"version":"f5c779b7ddbda30866cf2a27c63e34158f858c73","status":"affected","lessThan":"b967a595fb735d313a8676b2ca6a4cba38506482","versionType":"git"},{"version":"f5c779b7ddbda30866cf2a27c63e34158f858c73","status":"affected","lessThan":"55c677619084f9c9fa4146d933cc8ccafc924c87","versionType":"git"},{"version":"f5c779b7ddbda30866cf2a27c63e34158f858c73","status":"affected","lessThan":"99b25b046e47e4904373cfeb445c5483f1633d88","versionType":"git"},{"version":"708c304b583d789957399dd8237f212cf8ad1e4d","status":"affected","versionType":"git"},{"version":"d270631c21e68fb8016d6e231d022d7023a2df6f","status":"affected","versionType":"git"},{"version":"02f41d88f15d6b7d523e52cc3f87488f57e9265b","status":"affected","versionType":"git"},{"version":"6.1.29","status":"affected","lessThan":"6.1.191","versionType":"semver"},{"version":"5.15.145","status":"affected","lessThan":"5.16","versionType":"semver"},{"version":"6.2.16","status":"affected","lessThan":"6.3","versionType":"semver"},{"version":"6.3.2","status":"affected","lessThan":"6.4","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/mgmt/user_session.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","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/server/mgmt/user_session.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/869807cdd5599c289c21d40f36a504d72a0d23c6"},{"url":"https://git.kernel.org/stable/c/988f99bfddda4e2d1da5f6e98b237dd85e123cee"},{"url":"https://git.kernel.org/stable/c/03a22a003f41b182245e6c71fe565e277cff7094"},{"url":"https://git.kernel.org/stable/c/b967a595fb735d313a8676b2ca6a4cba38506482"},{"url":"https://git.kernel.org/stable/c/55c677619084f9c9fa4146d933cc8ccafc924c87"},{"url":"https://git.kernel.org/stable/c/99b25b046e47e4904373cfeb445c5483f1633d88"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:34:25.965Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.29","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}