CVE-2021-47392 (GCVE-0-2021-47392)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:03 – Updated: 2026-05-23 15:19
VLAI
Title
RDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure If cma_listen_on_all() fails it leaves the per-device ID still on the listen_list but the state is not set to RDMA_CM_ADDR_BOUND. When the cmid is eventually destroyed cma_cancel_listens() is not called due to the wrong state, however the per-device IDs are still holding the refcount preventing the ID from being destroyed, thus deadlocking: task:rping state:D stack: 0 pid:19605 ppid: 47036 flags:0x00000084 Call Trace: __schedule+0x29a/0x780 ? free_unref_page_commit+0x9b/0x110 schedule+0x3c/0xa0 schedule_timeout+0x215/0x2b0 ? __flush_work+0x19e/0x1e0 wait_for_completion+0x8d/0xf0 _destroy_id+0x144/0x210 [rdma_cm] ucma_close_id+0x2b/0x40 [rdma_ucm] __destroy_id+0x93/0x2c0 [rdma_ucm] ? __xa_erase+0x4a/0xa0 ucma_destroy_id+0x9a/0x120 [rdma_ucm] ucma_write+0xb8/0x130 [rdma_ucm] vfs_write+0xb4/0x250 ksys_write+0xb5/0xd0 ? syscall_trace_enter.isra.19+0x123/0x190 do_syscall_64+0x33/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Ensure that cma_listen_on_all() atomically unwinds its action under the lock during error.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:38 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 70ba8b1697e35c04ea5f22edb6e401aeb1208d96 , < 3f4e68902d2e545033c80d7ad62fd9a439e573f4 (git)
Affected: c80a0c52d85c49a910d0dc0e342e8d8898677dc0 , < e56a5146ef8cb51cd7c9e748267dce7564448a35 (git)
Affected: c80a0c52d85c49a910d0dc0e342e8d8898677dc0 , < ca465e1f1f9b38fe916a36f7d80c5d25f2337c81 (git)
Affected: 5.10.4 , < 5.10.71 (semver)
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Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.10.71 , ≤ 5.10.* (semver)
Unaffected: 5.14.10 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: RDMA/cma: corrige la fuga del oyente en el fallo de rdma_cma_listen_on_all(). Si cma_listen_on_all() falla, deja el ID por dispositivo todav\u00eda en la lista de escucha, pero el estado no est\u00e1 configurado en RDMA_CM_ADDR_BOUND. Cuando el cmid finalmente se destruye, no se llama a cma_cancel_listens() debido a un estado incorrecto; sin embargo, los ID por dispositivo a\u00fan mantienen el refcount evitando que el ID se destruya, lo que genera un punto muerto: tarea:rping estado:D pila: 0 pid: 19605 ppid: 47036 banderas: 0x00000084 Seguimiento de llamadas: __schedule+0x29a/0x780? free_unref_page_commit+0x9b/0x110 Schedule+0x3c/0xa0 Schedule_timeout+0x215/0x2b0? __flush_work+0x19e/0x1e0 wait_for_completion+0x8d/0xf0 _destroy_id+0x144/0x210 [rdma_cm] ucma_close_id+0x2b/0x40 [rdma_ucm] __destroy_id+0x93/0x2c0 [rdma_ucm] ? __xa_erase+0x4a/0xa0 ucma_destroy_id+0x9a/0x120 [rdma_ucm] ucma_write+0xb8/0x130 [rdma_ucm] vfs_write+0xb4/0x250 ksys_write+0xb5/0xd0 ? syscall_trace_enter.isra.19+0x123/0x190 do_syscall_64+0x33/0x40 Entry_SYSCALL_64_after_hwframe+0x44/0xa9 Aseg\u00farese de que cma_listen_on_all() desenrolle at\u00f3micamente su acci\u00f3n bajo el bloqueo durante el error."
          }
        ],
        "id": "CVE-2021-47392",
        "lastModified": "2026-06-17T04:17:21.950",
        "metrics": {
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                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47392.json",
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      "initial_release_date": "2024-05-28T03:34:21Z",
      "product_status:known_affected": "269",
      "product_status:known_not_affected": "224",
      "product_status:recommended": "543",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-47392",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47392.json",
      "version": "57"
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            ],
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                  "content": {
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                      {
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            "title": "CISA ADP Vulnrichment"
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              "product": "Linux",
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            {
              "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."
            }
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            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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            {
              "url": "https://git.kernel.org/stable/c/ca465e1f1f9b38fe916a36f7d80c5d25f2337c81"
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          "title": "RDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure",
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        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47392",
        "datePublished": "2024-05-21T15:03:50.192Z",
        "dateReserved": "2024-05-21T14:58:30.813Z",
        "dateUpdated": "2026-05-23T15:19:54.848Z",
        "state": "PUBLISHED"
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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