{"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"}}}}