{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-07T18:51:52.772","vulnerabilities":[{"cve":{"id":"CVE-2021-47507","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2024-05-24T15:15:11.400","lastModified":"2025-09-24T19:17:55.480","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: Fix nsfd startup race (again)\n\nCommit bd5ae9288d64 (\"nfsd: register pernet ops last, unregister first\")\nhas re-opened rpc_pipefs_event() race against nfsd_net_id registration\n(register_pernet_subsys()) which has been fixed by commit bb7ffbf29e76\n(\"nfsd: fix nsfd startup race triggering BUG_ON\").\n\nRestore the order of register_pernet_subsys() vs register_cld_notifier().\nAdd WARN_ON() to prevent a future regression.\n\nCrash info:\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000012\nCPU: 8 PID: 345 Comm: mount Not tainted 5.4.144-... #1\npc : rpc_pipefs_event+0x54/0x120 [nfsd]\nlr : rpc_pipefs_event+0x48/0x120 [nfsd]\nCall trace:\n rpc_pipefs_event+0x54/0x120 [nfsd]\n blocking_notifier_call_chain\n rpc_fill_super\n get_tree_keyed\n rpc_fs_get_tree\n vfs_get_tree\n do_mount\n ksys_mount\n __arm64_sys_mount\n el0_svc_handler\n el0_svc"},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfsd: corrige la ejecución de inicio de nsfd (nuevamente) El commit bd5ae9288d64 (\"nfsd: registre las operaciones de pernet al final, anule el registro primero\") ha reabierto la ejecución de rpc_pipefs_event() contra el registro de nfsd_net_id (register_pernet_subsys( )) que se ha solucionado mediante el commit bb7ffbf29e76 (\"nfsd: arreglar la ejecución de inicio de nsfd que activa BUG_ON\"). Restaure el orden de Register_pernet_subsys() frente a Register_cld_notifier(). Agregue WARN_ON() para evitar una regresión futura. Información de falla: no se puede manejar la desreferencia del puntero NULL del kernel en la dirección virtual 0000000000000012 CPU: 8 PID: 345 Comm: mount Not tainted 5.4.144-... #1 pc: rpc_pipefs_event+0x54/0x120 [nfsd] lr: rpc_pipefs_event+0x48/ 0x120 [nfsd] Rastreo de llamadas: rpc_pipefs_event+0x54/0x120 [nfsd] blocking_notifier_call_chain rpc_fill_super get_tree_keyed rpc_fs_get_tree vfs_get_tree do_mount ksys_mount __arm64_sys_mount el0_svc_handler el0_svc"}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":4.7,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.0,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-362"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.102","versionEndExcluding":"5.4.165","matchCriteriaId":"A0D5C567-7B87-43EE-B0FC-159293C8978C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.20","versionEndExcluding":"5.10.85","matchCriteriaId":"75AD2AC7-1AA4-43FD-98B8-DE29CB66448E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11.3","versionEndExcluding":"5.15.8","matchCriteriaId":"C681853B-53AB-42A9-B5BC-153C89266864"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*","matchCriteriaId":"357AA433-37E8-4323-BFB2-3038D6E4B414"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*","matchCriteriaId":"A73429BA-C2D9-4D0C-A75F-06A1CA8B3983"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*","matchCriteriaId":"F621B5E3-E99D-49E7-90B9-EC3B77C95383"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*","matchCriteriaId":"F7BFDCAA-1650-49AA-8462-407DD593F94F"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/8bf902fee5893cfc2f04a698abab47629699ae9a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/b10252c7ae9c9d7c90552f88b544a44ee773af64","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/c520943a00ad5015704969ad3304c956bcd49d25","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/f5734b1714ca355703e9ea8fb61d04beff1790b9","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/8bf902fee5893cfc2f04a698abab47629699ae9a","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/b10252c7ae9c9d7c90552f88b544a44ee773af64","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/c520943a00ad5015704969ad3304c956bcd49d25","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/f5734b1714ca355703e9ea8fb61d04beff1790b9","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]}]}}]}