{"id":"CVE-2021-47392","state":"PUBLISHED","title":"RDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure\n\nIf cma_listen_on_all() fails it leaves the per-device ID still on the\nlisten_list but the state is not set to RDMA_CM_ADDR_BOUND.\n\nWhen the cmid is eventually destroyed cma_cancel_listens() is not called\ndue to the wrong state, however the per-device IDs are still holding the\nrefcount preventing the ID from being destroyed, thus deadlocking:\n\n task:rping state:D stack:   0 pid:19605 ppid: 47036 flags:0x00000084\n Call Trace:\n  __schedule+0x29a/0x780\n  ? free_unref_page_commit+0x9b/0x110\n  schedule+0x3c/0xa0\n  schedule_timeout+0x215/0x2b0\n  ? __flush_work+0x19e/0x1e0\n  wait_for_completion+0x8d/0xf0\n  _destroy_id+0x144/0x210 [rdma_cm]\n  ucma_close_id+0x2b/0x40 [rdma_ucm]\n  __destroy_id+0x93/0x2c0 [rdma_ucm]\n  ? __xa_erase+0x4a/0xa0\n  ucma_destroy_id+0x9a/0x120 [rdma_ucm]\n  ucma_write+0xb8/0x130 [rdma_ucm]\n  vfs_write+0xb4/0x250\n  ksys_write+0xb5/0xd0\n  ? syscall_trace_enter.isra.19+0x123/0x190\n  do_syscall_64+0x33/0x40\n  entry_SYSCALL_64_after_hwframe+0x44/0xa9\n\nEnsure that cma_listen_on_all() atomically unwinds its action under the\nlock during error.","publishedAt":"2024-05-21T15:03:50.192Z","updatedAt":"2026-05-23T15:19:54.848Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"70ba8b1697e35c04ea5f22edb6e401aeb1208d96","status":"affected","lessThan":"3f4e68902d2e545033c80d7ad62fd9a439e573f4","versionType":"git"},{"version":"c80a0c52d85c49a910d0dc0e342e8d8898677dc0","status":"affected","lessThan":"e56a5146ef8cb51cd7c9e748267dce7564448a35","versionType":"git"},{"version":"c80a0c52d85c49a910d0dc0e342e8d8898677dc0","status":"affected","lessThan":"ca465e1f1f9b38fe916a36f7d80c5d25f2337c81","versionType":"git"},{"version":"5.10.4","status":"affected","lessThan":"5.10.71","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/core/cma.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.11","versionType":"semver"},{"version":"5.10.71","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.14.10","status":"unaffected","lessThanOrEqual":"5.14.*","versionType":"semver"},{"version":"5.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/core/cma.c"]}],"references":["https://git.kernel.org/stable/c/3f4e68902d2e545033c80d7ad62fd9a439e573f4","https://git.kernel.org/stable/c/e56a5146ef8cb51cd7c9e748267dce7564448a35","https://git.kernel.org/stable/c/ca465e1f1f9b38fe916a36f7d80c5d25f2337c81"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47392.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47392","state":"PUBLISHED","datePublished":"2024-05-21T15:03:50.192Z","dateUpdated":"2026-05-23T15:19:54.848Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-21T14:58:30.813Z"},"containers":{"cna":{"title":"RDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure\n\nIf cma_listen_on_all() fails it leaves the per-device ID still on the\nlisten_list but the state is not set to RDMA_CM_ADDR_BOUND.\n\nWhen the cmid is eventually destroyed cma_cancel_listens() is not called\ndue to the wrong state, however the per-device IDs are still holding the\nrefcount preventing the ID from being destroyed, thus deadlocking:\n\n task:rping state:D stack:   0 pid:19605 ppid: 47036 flags:0x00000084\n Call Trace:\n  __schedule+0x29a/0x780\n  ? free_unref_page_commit+0x9b/0x110\n  schedule+0x3c/0xa0\n  schedule_timeout+0x215/0x2b0\n  ? __flush_work+0x19e/0x1e0\n  wait_for_completion+0x8d/0xf0\n  _destroy_id+0x144/0x210 [rdma_cm]\n  ucma_close_id+0x2b/0x40 [rdma_ucm]\n  __destroy_id+0x93/0x2c0 [rdma_ucm]\n  ? __xa_erase+0x4a/0xa0\n  ucma_destroy_id+0x9a/0x120 [rdma_ucm]\n  ucma_write+0xb8/0x130 [rdma_ucm]\n  vfs_write+0xb4/0x250\n  ksys_write+0xb5/0xd0\n  ? syscall_trace_enter.isra.19+0x123/0x190\n  do_syscall_64+0x33/0x40\n  entry_SYSCALL_64_after_hwframe+0x44/0xa9\n\nEnsure that cma_listen_on_all() atomically unwinds its action under the\nlock during error."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"70ba8b1697e35c04ea5f22edb6e401aeb1208d96","status":"affected","lessThan":"3f4e68902d2e545033c80d7ad62fd9a439e573f4","versionType":"git"},{"version":"c80a0c52d85c49a910d0dc0e342e8d8898677dc0","status":"affected","lessThan":"e56a5146ef8cb51cd7c9e748267dce7564448a35","versionType":"git"},{"version":"c80a0c52d85c49a910d0dc0e342e8d8898677dc0","status":"affected","lessThan":"ca465e1f1f9b38fe916a36f7d80c5d25f2337c81","versionType":"git"},{"version":"5.10.4","status":"affected","lessThan":"5.10.71","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/core/cma.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.11","versionType":"semver"},{"version":"5.10.71","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.14.10","status":"unaffected","lessThanOrEqual":"5.14.*","versionType":"semver"},{"version":"5.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/core/cma.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3f4e68902d2e545033c80d7ad62fd9a439e573f4"},{"url":"https://git.kernel.org/stable/c/e56a5146ef8cb51cd7c9e748267dce7564448a35"},{"url":"https://git.kernel.org/stable/c/ca465e1f1f9b38fe916a36f7d80c5d25f2337c81"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:19:54.848Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.4","versionEndExcluding":"5.10.71"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.14.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/3f4e68902d2e545033c80d7ad62fd9a439e573f4","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/e56a5146ef8cb51cd7c9e748267dce7564448a35","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/ca465e1f1f9b38fe916a36f7d80c5d25f2337c81","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T05:39:59.737Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47392","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:38:16.602700Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-11T17:33:43.395Z"}}]}}}