{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47507","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-22T06:20:56.206Z","datePublished":"2024-05-24T15:01:53.401Z","dateUpdated":"2025-05-04T12:41:35.982Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T12:41:35.982Z"},"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"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfs4recover.c","fs/nfsd/nfsctl.c"],"versions":[{"version":"8677e99150b0830d29cc1318b4cc559e176940bb","lessThan":"f5734b1714ca355703e9ea8fb61d04beff1790b9","status":"affected","versionType":"git"},{"version":"7c7cb07d4affcf41749234fe9dc4d90cd3959e32","lessThan":"c520943a00ad5015704969ad3304c956bcd49d25","status":"affected","versionType":"git"},{"version":"bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7","lessThan":"8bf902fee5893cfc2f04a698abab47629699ae9a","status":"affected","versionType":"git"},{"version":"bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7","lessThan":"b10252c7ae9c9d7c90552f88b544a44ee773af64","status":"affected","versionType":"git"},{"version":"4d41f65efeec0a6da6088341203c81e49ebfcd90","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfs4recover.c","fs/nfsd/nfsctl.c"],"versions":[{"version":"5.12","status":"affected"},{"version":"0","lessThan":"5.12","status":"unaffected","versionType":"semver"},{"version":"5.4.165","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.85","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.8","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.16","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":"5.4.102","versionEndExcluding":"5.4.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.20","versionEndExcluding":"5.10.85"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.15.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/f5734b1714ca355703e9ea8fb61d04beff1790b9"},{"url":"https://git.kernel.org/stable/c/c520943a00ad5015704969ad3304c956bcd49d25"},{"url":"https://git.kernel.org/stable/c/8bf902fee5893cfc2f04a698abab47629699ae9a"},{"url":"https://git.kernel.org/stable/c/b10252c7ae9c9d7c90552f88b544a44ee773af64"}],"title":"nfsd: Fix nsfd startup race (again)","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:39:59.833Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/f5734b1714ca355703e9ea8fb61d04beff1790b9","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c520943a00ad5015704969ad3304c956bcd49d25","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/8bf902fee5893cfc2f04a698abab47629699ae9a","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/b10252c7ae9c9d7c90552f88b544a44ee773af64","tags":["x_transferred"]}]},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47507","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:35:42.793649Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-11T17:32:52.727Z"}}]}}