{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99276","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.405Z","datePublished":"2026-11-07T14:08:46.432Z","dateUpdated":"2026-11-07T14:08:46.432Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-11-07T14:08:46.432Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: defer connection scavenging while session locks are busy\n\nThe expiration worker holds conn_list_lock for reading while checking\nfor authenticated sessions. Without this change, the check can wait for\nconn->session_lock or sessions_table_lock.\n\nIn destroy_previous_session(), the status updates after\nksmbd_conn_wait_idle_sess() run with both session locks held for\nwriting. Both the KSMBD_SESS_GOOD error path and the\nKSMBD_SESS_NEED_SETUP success path call ksmbd_all_conn_set_status(),\nwhich takes conn_list_lock for reading.\n\nA writer queued on conn_list_lock can block these new read acquisitions.\nThe worker then waits for a session lock held by\ndestroy_previous_session(), which waits behind the writer. The writer\ncannot proceed until the worker releases conn_list_lock.\n\nTry both session locks instead of waiting in the scavenging check. Keep\nthe connection when either lock is busy and let the periodic worker\nretry later."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/mgmt/user_session.c"],"versions":[{"version":"d7fd1f98607f2cd358e583f9548bdf0173090a86","lessThan":"4e4e8b38994a0b0fc23f00ca6698b469a41abe70","status":"affected","versionType":"git"},{"version":"d7fd1f98607f2cd358e583f9548bdf0173090a86","lessThan":"b4bae7af1154089be87c7475218264fcbfd16d10","status":"affected","versionType":"git"},{"version":"c99ea7855124ca1428a1e59c2b4590aaef34eacf","status":"affected","versionType":"git"},{"version":"7.2.8","lessThan":"7.3","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/mgmt/user_session.c"],"versions":[{"version":"7.3","status":"affected"},{"version":"0","lessThan":"7.3","status":"unaffected","versionType":"semver"},{"version":"7.3.2","lessThanOrEqual":"7.3.*","status":"unaffected","versionType":"semver"},{"version":"7.4-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.3","versionEndExcluding":"7.3.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.3","versionEndExcluding":"7.4-rc1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.2.8"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/4e4e8b38994a0b0fc23f00ca6698b469a41abe70"},{"url":"https://git.kernel.org/stable/c/b4bae7af1154089be87c7475218264fcbfd16d10"}],"title":"ksmbd: defer connection scavenging while session locks are busy","x_generator":{"engine":"bippy-1.2.0"}}}}