{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47163", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-25T09:12:14.109Z", "datePublished": "2024-03-25T09:16:16.676Z", "dateUpdated": "2024-11-04T12:00:38.100Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T12:00:38.100Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: wait and exit until all work queues are done\n\nOn some host, a crash could be triggered simply by repeating these\ncommands several times:\n\n # modprobe tipc\n # tipc bearer enable media udp name UDP1 localip 127.0.0.1\n # rmmod tipc\n\n [] BUG: unable to handle kernel paging request at ffffffffc096bb00\n [] Workqueue: events 0xffffffffc096bb00\n [] Call Trace:\n [] ? process_one_work+0x1a7/0x360\n [] ? worker_thread+0x30/0x390\n [] ? create_worker+0x1a0/0x1a0\n [] ? kthread+0x116/0x130\n [] ? kthread_flush_work_fn+0x10/0x10\n [] ? ret_from_fork+0x35/0x40\n\nWhen removing the TIPC module, the UDP tunnel sock will be delayed to\nrelease in a work queue as sock_release() can't be done in rtnl_lock().\nIf the work queue is schedule to run after the TIPC module is removed,\nkernel will crash as the work queue function cleanup_beareri() code no\nlonger exists when trying to invoke it.\n\nTo fix it, this patch introduce a member wq_count in tipc_net to track\nthe numbers of work queues in schedule, and wait and exit until all\nwork queues are done in tipc_exit_net()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/tipc/core.c", "net/tipc/core.h", "net/tipc/udp_media.c"], "versions": [{"version": "d0f91938bede", "lessThan": "d1f76dfadaf8", "status": "affected", "versionType": "git"}, {"version": "d0f91938bede", "lessThan": "5195ec5e365a", "status": "affected", "versionType": "git"}, {"version": "d0f91938bede", "lessThan": "b9f5b7ad4ac3", "status": "affected", "versionType": "git"}, {"version": "d0f91938bede", "lessThan": "04c26faa51d1", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/tipc/core.c", "net/tipc/core.h", "net/tipc/udp_media.c"], "versions": [{"version": "4.1", "status": "affected"}, {"version": "0", "lessThan": "4.1", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.124", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.42", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.9", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/d1f76dfadaf8f47ed1753f97dbcbd41c16215ffa"}, {"url": "https://git.kernel.org/stable/c/5195ec5e365a2a9331bfeb585b613a6e94f98dba"}, {"url": "https://git.kernel.org/stable/c/b9f5b7ad4ac3af006443f535b1ce7bff1d130d7d"}, {"url": "https://git.kernel.org/stable/c/04c26faa51d1e2fe71cf13c45791f5174c37f986"}], "title": "tipc: wait and exit until all work queues are done", "x_generator": {"engine": "bippy-9e1c9544281a"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47163", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-04-01T19:41:39.688056Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:15:00.578Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.948Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/d1f76dfadaf8f47ed1753f97dbcbd41c16215ffa", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/5195ec5e365a2a9331bfeb585b613a6e94f98dba", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/b9f5b7ad4ac3af006443f535b1ce7bff1d130d7d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/04c26faa51d1e2fe71cf13c45791f5174c37f986", "tags": ["x_transferred"]}]}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: wait and exit until all work queues are done\n\nOn some host, a crash could be triggered simply by repeating these\ncommands several times:\n\n # modprobe tipc\n # tipc bearer enable media udp name UDP1 localip 127.0.0.1\n # rmmod tipc\n\n [] BUG: unable to handle kernel paging request at ffffffffc096bb00\n [] Workqueue: events 0xffffffffc096bb00\n [] Call Trace:\n [] ? process_one_work+0x1a7/0x360\n [] ? worker_thread+0x30/0x390\n [] ? create_worker+0x1a0/0x1a0\n [] ? kthread+0x116/0x130\n [] ? kthread_flush_work_fn+0x10/0x10\n [] ? ret_from_fork+0x35/0x40\n\nWhen removing the TIPC module, the UDP tunnel sock will be delayed to\nrelease in a work queue as sock_release() can't be done in rtnl_lock().\nIf the work queue is schedule to run after the TIPC module is removed,\nkernel will crash as the work queue function cleanup_beareri() code no\nlonger exists when trying to invoke it.\n\nTo fix it, this patch introduce a member wq_count in tipc_net to track\nthe numbers of work queues in schedule, and wait and exit until all\nwork queues are done in tipc_exit_net()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tipc: espere y salga hasta que todas las colas de trabajo est\u00e9n terminadas. En algunos hosts, se podr\u00eda desencadenar un bloqueo simplemente repitiendo estos comandos varias veces: # modprobe tipc # tipc portador habilitar media udp nombre UDP1 localip 127.0.0.1 # rmmod tipc [] ERROR: no se puede manejar la solicitud de paginaci\u00f3n del kernel en ffffffffc096bb00 [] Cola de trabajo: eventos 0xffffffffc096bb00 [] Seguimiento de llamadas: []? proceso_one_work+0x1a7/0x360 []? hilo_trabajador+0x30/0x390 []? crear_trabajador+0x1a0/0x1a0 []? kthread+0x116/0x130 []? kthread_flush_work_fn+0x10/0x10 []? ret_from_fork+0x35/0x40 Al retirar el m\u00f3dulo TIPC, el calcet\u00edn del t\u00fanel UDP se retrasar\u00e1 para liberarse en una cola de trabajo, ya que sock_release() no se puede realizar en rtnl_lock(). Si la cola de trabajo est\u00e1 programada para ejecutarse despu\u00e9s de eliminar el m\u00f3dulo TIPC, el kernel fallar\u00e1 porque el c\u00f3digo de la funci\u00f3n de cola de trabajo cleanup_beareri() ya no existe al intentar invocarlo. Para solucionarlo, este parche introduce un miembro wq_count en tipc_net para rastrear el n\u00famero de colas de trabajo programadas y esperar y salir hasta que todas las colas de trabajo est\u00e9n terminadas en tipc_exit_net()."}], "id": "CVE-2021-47163", "lastModified": "2024-03-25T13:47:14.087", "metrics": {}, "published": "2024-03-25T10:15:08.530", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/04c26faa51d1e2fe71cf13c45791f5174c37f986"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5195ec5e365a2a9331bfeb585b613a6e94f98dba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b9f5b7ad4ac3af006443f535b1ce7bff1d130d7d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d1f76dfadaf8f47ed1753f97dbcbd41c16215ffa"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: tipc: wait and exit until all work queues are done", "id": "2271452", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2271452"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-99", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ntipc: wait and exit until all work queues are done\nOn some host, a crash could be triggered simply by repeating these\ncommands several times:\n# modprobe tipc\n# tipc bearer enable media udp name UDP1 localip 127.0.0.1\n# rmmod tipc\n[] BUG: unable to handle kernel paging request at ffffffffc096bb00\n[] Workqueue: events 0xffffffffc096bb00\n[] Call Trace:\n[] ? process_one_work+0x1a7/0x360\n[] ? worker_thread+0x30/0x390\n[] ? create_worker+0x1a0/0x1a0\n[] ? kthread+0x116/0x130\n[] ? kthread_flush_work_fn+0x10/0x10\n[] ? ret_from_fork+0x35/0x40\nWhen removing the TIPC module, the UDP tunnel sock will be delayed to\nrelease in a work queue as sock_release() can't be done in rtnl_lock().\nIf the work queue is schedule to run after the TIPC module is removed,\nkernel will crash as the work queue function cleanup_beareri() code no\nlonger exists when trying to invoke it.\nTo fix it, this patch introduce a member wq_count in tipc_net to track\nthe numbers of work queues in schedule, and wait and exit until all\nwork queues are done in tipc_exit_net()."], "name": "CVE-2021-47163", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-03-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47163\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47163\nhttps://lore.kernel.org/linux-cve-announce/2024032534-CVE-2021-47163-3ab9@gregkh/T"], "threat_severity": "Low", "upstream_fix": "kernel 5.4.124, kernel 5.10.42, kernel 5.12.9, kernel 5.13"}