CVE-2021-46983 (GCVE-0-2021-46983)

Vulnerability from cvelistv5 – Published: 2024-02-28 08:13 – Updated: 2026-05-11 13:45
VLAI
Title
nvmet-rdma: Fix NULL deref when SEND is completed with error
Summary
In the Linux kernel, the following vulnerability has been resolved: nvmet-rdma: Fix NULL deref when SEND is completed with error When running some traffic and taking down the link on peer, a retry counter exceeded error is received. This leads to nvmet_rdma_error_comp which tried accessing the cq_context to obtain the queue. The cq_context is no longer valid after the fix to use shared CQ mechanism and should be obtained similar to how it is obtained in other functions from the wc->qp. [ 905.786331] nvmet_rdma: SEND for CQE 0x00000000e3337f90 failed with status transport retry counter exceeded (12). [ 905.832048] BUG: unable to handle kernel NULL pointer dereference at 0000000000000048 [ 905.839919] PGD 0 P4D 0 [ 905.842464] Oops: 0000 1 SMP NOPTI [ 905.846144] CPU: 13 PID: 1557 Comm: kworker/13:1H Kdump: loaded Tainted: G OE --------- - - 4.18.0-304.el8.x86_64 #1 [ 905.872135] RIP: 0010:nvmet_rdma_error_comp+0x5/0x1b [nvmet_rdma] [ 905.878259] Code: 19 4f c0 e8 89 b3 a5 f6 e9 5b e0 ff ff 0f b7 75 14 4c 89 ea 48 c7 c7 08 1a 4f c0 e8 71 b3 a5 f6 e9 4b e0 ff ff 0f 1f 44 00 00 <48> 8b 47 48 48 85 c0 74 08 48 89 c7 e9 98 bf 49 00 e9 c3 e3 ff ff [ 905.897135] RSP: 0018:ffffab601c45fe28 EFLAGS: 00010246 [ 905.902387] RAX: 0000000000000065 RBX: ffff9e729ea2f800 RCX: 0000000000000000 [ 905.909558] RDX: 0000000000000000 RSI: ffff9e72df9567c8 RDI: 0000000000000000 [ 905.916731] RBP: ffff9e729ea2b400 R08: 000000000000074d R09: 0000000000000074 [ 905.923903] R10: 0000000000000000 R11: ffffab601c45fcc0 R12: 0000000000000010 [ 905.931074] R13: 0000000000000000 R14: 0000000000000010 R15: ffff9e729ea2f400 [ 905.938247] FS: 0000000000000000(0000) GS:ffff9e72df940000(0000) knlGS:0000000000000000 [ 905.938249] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 905.950067] nvmet_rdma: SEND for CQE 0x00000000c7356cca failed with status transport retry counter exceeded (12). [ 905.961855] CR2: 0000000000000048 CR3: 000000678d010004 CR4: 00000000007706e0 [ 905.961855] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 905.961856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 905.961857] PKRU: 55555554 [ 906.010315] Call Trace: [ 906.012778] __ib_process_cq+0x89/0x170 [ib_core] [ 906.017509] ib_cq_poll_work+0x26/0x80 [ib_core] [ 906.022152] process_one_work+0x1a7/0x360 [ 906.026182] ? create_worker+0x1a0/0x1a0 [ 906.030123] worker_thread+0x30/0x390 [ 906.033802] ? create_worker+0x1a0/0x1a0 [ 906.037744] kthread+0x116/0x130 [ 906.040988] ? kthread_flush_work_fn+0x10/0x10 [ 906.045456] ret_from_fork+0x1f/0x40
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ca0f1a8055be2a04073af435dc68419334481638 , < 64f3410c7bfc389b1a58611d0799f4a36ce4b6b5 (git)
Affected: ca0f1a8055be2a04073af435dc68419334481638 , < 17fb6dfa5162b89ecfa07df891a53afec321abe8 (git)
Affected: ca0f1a8055be2a04073af435dc68419334481638 , < 5bdb34466ad8370546dfa0497594fb1d6f2fed90 (git)
Affected: ca0f1a8055be2a04073af435dc68419334481638 , < 8cc365f9559b86802afc0208389f5c8d46b4ad61 (git)
Create a notification for this product.
Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 5.10.38 , ≤ 5.10.* (semver)
Unaffected: 5.11.22 , ≤ 5.11.* (semver)
Unaffected: 5.12.5 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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    "dateReserved": "2024-02-27T18:42:55.946Z",
    "dateUpdated": "2026-05-11T13:45:41.182Z",
    "state": "PUBLISHED"
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      "date": "2026-07-27",
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnvmet-rdma: Fix NULL deref when SEND is completed with error\\n\\nWhen running some traffic and taking down the link on peer, a\\nretry counter exceeded error is received. This leads to\\nnvmet_rdma_error_comp which tried accessing the cq_context to\\nobtain the queue. The cq_context is no longer valid after the\\nfix to use shared CQ mechanism and should be obtained similar\\nto how it is obtained in other functions from the wc-\u003eqp.\\n\\n[ 905.786331] nvmet_rdma: SEND for CQE 0x00000000e3337f90 failed with status transport retry counter exceeded (12).\\n[ 905.832048] BUG: unable to handle kernel NULL pointer dereference at 0000000000000048\\n[ 905.839919] PGD 0 P4D 0\\n[ 905.842464] Oops: 0000 1 SMP NOPTI\\n[ 905.846144] CPU: 13 PID: 1557 Comm: kworker/13:1H Kdump: loaded Tainted: G OE --------- - - 4.18.0-304.el8.x86_64 #1\\n[ 905.872135] RIP: 0010:nvmet_rdma_error_comp+0x5/0x1b [nvmet_rdma]\\n[ 905.878259] Code: 19 4f c0 e8 89 b3 a5 f6 e9 5b e0 ff ff 0f b7 75 14 4c 89 ea 48 c7 c7 08 1a 4f c0 e8 71 b3 a5 f6 e9 4b e0 ff ff 0f 1f 44 00 00 \u003c48\u003e 8b 47 48 48 85 c0 74 08 48 89 c7 e9 98 bf 49 00 e9 c3 e3 ff ff\\n[ 905.897135] RSP: 0018:ffffab601c45fe28 EFLAGS: 00010246\\n[ 905.902387] RAX: 0000000000000065 RBX: ffff9e729ea2f800 RCX: 0000000000000000\\n[ 905.909558] RDX: 0000000000000000 RSI: ffff9e72df9567c8 RDI: 0000000000000000\\n[ 905.916731] RBP: ffff9e729ea2b400 R08: 000000000000074d R09: 0000000000000074\\n[ 905.923903] R10: 0000000000000000 R11: ffffab601c45fcc0 R12: 0000000000000010\\n[ 905.931074] R13: 0000000000000000 R14: 0000000000000010 R15: ffff9e729ea2f400\\n[ 905.938247] FS: 0000000000000000(0000) GS:ffff9e72df940000(0000) knlGS:0000000000000000\\n[ 905.938249] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[ 905.950067] nvmet_rdma: SEND for CQE 0x00000000c7356cca failed with status transport retry counter exceeded (12).\\n[ 905.961855] CR2: 0000000000000048 CR3: 000000678d010004 CR4: 00000000007706e0\\n[ 905.961855] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n[ 905.961856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\n[ 905.961857] PKRU: 55555554\\n[ 906.010315] Call Trace:\\n[ 906.012778] __ib_process_cq+0x89/0x170 [ib_core]\\n[ 906.017509] ib_cq_poll_work+0x26/0x80 [ib_core]\\n[ 906.022152] process_one_work+0x1a7/0x360\\n[ 906.026182] ? create_worker+0x1a0/0x1a0\\n[ 906.030123] worker_thread+0x30/0x390\\n[ 906.033802] ? create_worker+0x1a0/0x1a0\\n[ 906.037744] kthread+0x116/0x130\\n[ 906.040988] ? kthread_flush_work_fn+0x10/0x10\\n[ 906.045456] ret_from_fork+0x1f/0x40\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: nvmet-rdma: corrige la deref NULL cuando se completa SEND con error Al ejecutar algo de tr\\u00e1fico y eliminar el enlace en el par, se recibe un error de contador de reintentos excedido. Esto lleva a nvmet_rdma_error_comp que intent\\u00f3 acceder a cq_context para obtener la cola. El cq_context ya no es v\\u00e1lido despu\\u00e9s de la correcci\\u00f3n para usar el mecanismo CQ compartido y debe obtenerse de manera similar a c\\u00f3mo se obtiene en otras funciones de wc-\u0026gt;qp. [905.786331] nvmet_rdma: El ENV\\u00cdO para CQE 0x00000000e3337f90 fall\\u00f3 y se super\\u00f3 el contador de reintentos de transporte de estado (12). [905.832048] ERROR: no se puede manejar la desreferencia del puntero NULL del kernel en 0000000000000048 [905.839919] PGD 0 P4D 0 [905.842464] Vaya: 0000 1 SMP NOPTI [905.846144] CPU: 13 PID: 1557 Co mm: kworker/13:1H Kdump: cargado Contaminado : G OE --------- - - 4.18.0-304.el8.x86_64 #1 [ 905.872135] RIP: 0010:nvmet_rdma_error_comp+0x5/0x1b [nvmet_rdma] [ 905.878259] C\\u00f3digo: 19 4f c0 e8 89 B3 A5 F6 E9 5B E0 FF FF 0F B7 75 14 4C 89 EA 48 C7 C7 08 1A 4F C0 E8 71 B3 A5 F6 E9 4B E0 FF FF 0F 1F 44 00 00 00 \u0026lt;48\u0026gt; 8B 47 48 48 85 C0 74 08 48 89 c7 e9 98 bf 49 00 e9 c3 e3 ff ff [ 905.897135] RSP: 0018:ffffab601c45fe28 EFLAGS: 00010246 [ 905.902387] RAX: 00000000000000065 RBX: ffff9e729ea2f800 RCX: 0000000000000000 [ 905.909558] RDX: 0000000000000000 RSI: ffff9e72df9567c8 RDI: 00000000000000000 [ 905.916731] RBP : ffff9e729ea2b400 R08: 000000000000074d R09: 0000000000000074 [ 905.923903] R10: 00000000000000000 R11: ffffab601c45fcc0 R12: 00000000000 00010 [ 905.931074] R13: 0000000000000000 R14: 0000000000000010 R15: ffff9e729ea2f400 [ 905.938247] FS: 0000000000000000(0000) GS:ffff9e72 df940000(0000) knlGS:0000000000000000 [ 905.938249] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 905.950067] nvmet_rdma: ENV\\u00cdO para CQE 0x00000000c7356cca fall\\u00f3 con el contador de reintentos de transporte de estado excedido (12). [ 905.961855] CR2: 0000000000000048 CR3: 000000678d010004 CR4: 00000000007706e0 [ 905.961855] DR0: 00000000000000000 DR1: 00000000000000 00 DR2: 0000000000000000 [ 905.961856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 00000000000000400 [ 905.961857] PKRU: 55555554 [ 906.0 10315] Seguimiento de llamadas: [906.012778 ] __ib_process_cq+0x89/0x170 [ib_core] [ 906.017509] ib_cq_poll_work+0x26/0x80 [ib_core] [ 906.022152] Process_one_work+0x1a7/0x360 [ 906.026182] ? crear_trabajador+0x1a0/0x1a0 [ 906.030123] hilo_trabajador+0x30/0x390 [ 906.033802] ? create_worker+0x1a0/0x1a0 [ 906.037744] kthread+0x116/0x130 [ 906.040988] ? kthread_flush_work_fn+0x10/0x10 [ 906.045456] ret_from_fork+0x1f/0x40\"}]",
      "id": "CVE-2021-46983",
      "lastModified": "2024-12-06T16:02:03.857",
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      "published": "2024-02-28T09:15:37.410",
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      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Analyzed",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-476\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-46983\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-28T09:15:37.410\",\"lastModified\":\"2026-06-17T04:16:04.423\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnvmet-rdma: Fix NULL deref when SEND is completed with error\\n\\nWhen running some traffic and taking down the link on peer, a\\nretry counter exceeded error is received. This leads to\\nnvmet_rdma_error_comp which tried accessing the cq_context to\\nobtain the queue. The cq_context is no longer valid after the\\nfix to use shared CQ mechanism and should be obtained similar\\nto how it is obtained in other functions from the wc-\u003eqp.\\n\\n[ 905.786331] nvmet_rdma: SEND for CQE 0x00000000e3337f90 failed with status transport retry counter exceeded (12).\\n[ 905.832048] BUG: unable to handle kernel NULL pointer dereference at 0000000000000048\\n[ 905.839919] PGD 0 P4D 0\\n[ 905.842464] Oops: 0000 1 SMP NOPTI\\n[ 905.846144] CPU: 13 PID: 1557 Comm: kworker/13:1H Kdump: loaded Tainted: G OE --------- - - 4.18.0-304.el8.x86_64 #1\\n[ 905.872135] RIP: 0010:nvmet_rdma_error_comp+0x5/0x1b [nvmet_rdma]\\n[ 905.878259] Code: 19 4f c0 e8 89 b3 a5 f6 e9 5b e0 ff ff 0f b7 75 14 4c 89 ea 48 c7 c7 08 1a 4f c0 e8 71 b3 a5 f6 e9 4b e0 ff ff 0f 1f 44 00 00 \u003c48\u003e 8b 47 48 48 85 c0 74 08 48 89 c7 e9 98 bf 49 00 e9 c3 e3 ff ff\\n[ 905.897135] RSP: 0018:ffffab601c45fe28 EFLAGS: 00010246\\n[ 905.902387] RAX: 0000000000000065 RBX: ffff9e729ea2f800 RCX: 0000000000000000\\n[ 905.909558] RDX: 0000000000000000 RSI: ffff9e72df9567c8 RDI: 0000000000000000\\n[ 905.916731] RBP: ffff9e729ea2b400 R08: 000000000000074d R09: 0000000000000074\\n[ 905.923903] R10: 0000000000000000 R11: ffffab601c45fcc0 R12: 0000000000000010\\n[ 905.931074] R13: 0000000000000000 R14: 0000000000000010 R15: ffff9e729ea2f400\\n[ 905.938247] FS: 0000000000000000(0000) GS:ffff9e72df940000(0000) knlGS:0000000000000000\\n[ 905.938249] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[ 905.950067] nvmet_rdma: SEND for CQE 0x00000000c7356cca failed with status transport retry counter exceeded (12).\\n[ 905.961855] CR2: 0000000000000048 CR3: 000000678d010004 CR4: 00000000007706e0\\n[ 905.961855] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n[ 905.961856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\n[ 905.961857] PKRU: 55555554\\n[ 906.010315] Call Trace:\\n[ 906.012778] __ib_process_cq+0x89/0x170 [ib_core]\\n[ 906.017509] ib_cq_poll_work+0x26/0x80 [ib_core]\\n[ 906.022152] process_one_work+0x1a7/0x360\\n[ 906.026182] ? create_worker+0x1a0/0x1a0\\n[ 906.030123] worker_thread+0x30/0x390\\n[ 906.033802] ? create_worker+0x1a0/0x1a0\\n[ 906.037744] kthread+0x116/0x130\\n[ 906.040988] ? kthread_flush_work_fn+0x10/0x10\\n[ 906.045456] ret_from_fork+0x1f/0x40\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: nvmet-rdma: corrige la deref NULL cuando se completa SEND con error Al ejecutar algo de tr\u00e1fico y eliminar el enlace en el par, se recibe un error de contador de reintentos excedido. Esto lleva a nvmet_rdma_error_comp que intent\u00f3 acceder a cq_context para obtener la cola. El cq_context ya no es v\u00e1lido despu\u00e9s de la correcci\u00f3n para usar el mecanismo CQ compartido y debe obtenerse de manera similar a c\u00f3mo se obtiene en otras funciones de wc-\u0026gt;qp. [905.786331] nvmet_rdma: El ENV\u00cdO para CQE 0x00000000e3337f90 fall\u00f3 y se super\u00f3 el contador de reintentos de transporte de estado (12). [905.832048] ERROR: no se puede manejar la desreferencia del puntero NULL del kernel en 0000000000000048 [905.839919] PGD 0 P4D 0 [905.842464] Vaya: 0000 1 SMP NOPTI [905.846144] CPU: 13 PID: 1557 Co mm: kworker/13:1H Kdump: cargado Contaminado : G OE --------- - - 4.18.0-304.el8.x86_64 #1 [ 905.872135] RIP: 0010:nvmet_rdma_error_comp+0x5/0x1b [nvmet_rdma] [ 905.878259] C\u00f3digo: 19 4f c0 e8 89 B3 A5 F6 E9 5B E0 FF FF 0F B7 75 14 4C 89 EA 48 C7 C7 08 1A 4F C0 E8 71 B3 A5 F6 E9 4B E0 FF FF 0F 1F 44 00 00 00 \u0026lt;48\u0026gt; 8B 47 48 48 85 C0 74 08 48 89 c7 e9 98 bf 49 00 e9 c3 e3 ff ff [ 905.897135] RSP: 0018:ffffab601c45fe28 EFLAGS: 00010246 [ 905.902387] RAX: 00000000000000065 RBX: ffff9e729ea2f800 RCX: 0000000000000000 [ 905.909558] RDX: 0000000000000000 RSI: ffff9e72df9567c8 RDI: 00000000000000000 [ 905.916731] RBP : ffff9e729ea2b400 R08: 000000000000074d R09: 0000000000000074 [ 905.923903] R10: 00000000000000000 R11: ffffab601c45fcc0 R12: 00000000000 00010 [ 905.931074] R13: 0000000000000000 R14: 0000000000000010 R15: ffff9e729ea2f400 [ 905.938247] FS: 0000000000000000(0000) GS:ffff9e72 df940000(0000) knlGS:0000000000000000 [ 905.938249] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 905.950067] nvmet_rdma: ENV\u00cdO para CQE 0x00000000c7356cca fall\u00f3 con el contador de reintentos de transporte de estado excedido (12). [ 905.961855] CR2: 0000000000000048 CR3: 000000678d010004 CR4: 00000000007706e0 [ 905.961855] DR0: 00000000000000000 DR1: 00000000000000 00 DR2: 0000000000000000 [ 905.961856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 00000000000000400 [ 905.961857] PKRU: 55555554 [ 906.0 10315] Seguimiento de llamadas: [906.012778 ] __ib_process_cq+0x89/0x170 [ib_core] [ 906.017509] ib_cq_poll_work+0x26/0x80 [ib_core] [ 906.022152] Process_one_work+0x1a7/0x360 [ 906.026182] ? crear_trabajador+0x1a0/0x1a0 [ 906.030123] hilo_trabajador+0x30/0x390 [ 906.033802] ? create_worker+0x1a0/0x1a0 [ 906.037744] kthread+0x116/0x130 [ 906.040988] ? kthread_flush_work_fn+0x10/0x10 [ 906.045456] 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T14:17:49+00:00",
      "cve": "CVE-2021-46983",
      "id": "CVE-2021-46983",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:fixed": "198",
      "product_status:known_affected": "58",
      "product_status:known_not_affected": "124",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nvmet-rdma: Fix NULL deref when SEND is completed with error",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-46983.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-06-06T06:08:46Z",
      "cve": "CVE-2021-46983",
      "id": "CVE-2021-46983",
      "initial_release_date": "2024-03-01T04:08:00Z",
      "product_status:known_affected": "376",
      "product_status:known_not_affected": "208",
      "product_status:recommended": "111",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-46983",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-46983.json",
      "version": "40"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/64f3410c7bfc389b1a58611d0799f4a36ce4b6b5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/17fb6dfa5162b89ecfa07df891a53afec321abe8\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/5bdb34466ad8370546dfa0497594fb1d6f2fed90\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/8cc365f9559b86802afc0208389f5c8d46b4ad61\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:24:37.886Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-46983\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-02-28T19:05:12.428400Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:13.641Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"nvmet-rdma: Fix NULL deref when SEND is completed with error\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"ca0f1a8055be2a04073af435dc68419334481638\", \"lessThan\": \"64f3410c7bfc389b1a58611d0799f4a36ce4b6b5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ca0f1a8055be2a04073af435dc68419334481638\", \"lessThan\": \"17fb6dfa5162b89ecfa07df891a53afec321abe8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ca0f1a8055be2a04073af435dc68419334481638\", \"lessThan\": \"5bdb34466ad8370546dfa0497594fb1d6f2fed90\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ca0f1a8055be2a04073af435dc68419334481638\", \"lessThan\": \"8cc365f9559b86802afc0208389f5c8d46b4ad61\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/nvme/target/rdma.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.9\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.9\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.38\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.11.22\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.11.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/nvme/target/rdma.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/64f3410c7bfc389b1a58611d0799f4a36ce4b6b5\"}, {\"url\": \"https://git.kernel.org/stable/c/17fb6dfa5162b89ecfa07df891a53afec321abe8\"}, {\"url\": \"https://git.kernel.org/stable/c/5bdb34466ad8370546dfa0497594fb1d6f2fed90\"}, {\"url\": \"https://git.kernel.org/stable/c/8cc365f9559b86802afc0208389f5c8d46b4ad61\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnvmet-rdma: Fix NULL deref when SEND is completed with error\\n\\nWhen running some traffic and taking down the link on peer, a\\nretry counter exceeded error is received. This leads to\\nnvmet_rdma_error_comp which tried accessing the cq_context to\\nobtain the queue. The cq_context is no longer valid after the\\nfix to use shared CQ mechanism and should be obtained similar\\nto how it is obtained in other functions from the wc-\u003eqp.\\n\\n[ 905.786331] nvmet_rdma: SEND for CQE 0x00000000e3337f90 failed with status transport retry counter exceeded (12).\\n[ 905.832048] BUG: unable to handle kernel NULL pointer dereference at 0000000000000048\\n[ 905.839919] PGD 0 P4D 0\\n[ 905.842464] Oops: 0000 1 SMP NOPTI\\n[ 905.846144] CPU: 13 PID: 1557 Comm: kworker/13:1H Kdump: loaded Tainted: G OE --------- - - 4.18.0-304.el8.x86_64 #1\\n[ 905.872135] RIP: 0010:nvmet_rdma_error_comp+0x5/0x1b [nvmet_rdma]\\n[ 905.878259] Code: 19 4f c0 e8 89 b3 a5 f6 e9 5b e0 ff ff 0f b7 75 14 4c 89 ea 48 c7 c7 08 1a 4f c0 e8 71 b3 a5 f6 e9 4b e0 ff ff 0f 1f 44 00 00 \u003c48\u003e 8b 47 48 48 85 c0 74 08 48 89 c7 e9 98 bf 49 00 e9 c3 e3 ff ff\\n[ 905.897135] RSP: 0018:ffffab601c45fe28 EFLAGS: 00010246\\n[ 905.902387] RAX: 0000000000000065 RBX: ffff9e729ea2f800 RCX: 0000000000000000\\n[ 905.909558] RDX: 0000000000000000 RSI: ffff9e72df9567c8 RDI: 0000000000000000\\n[ 905.916731] RBP: ffff9e729ea2b400 R08: 000000000000074d R09: 0000000000000074\\n[ 905.923903] R10: 0000000000000000 R11: ffffab601c45fcc0 R12: 0000000000000010\\n[ 905.931074] R13: 0000000000000000 R14: 0000000000000010 R15: ffff9e729ea2f400\\n[ 905.938247] FS: 0000000000000000(0000) GS:ffff9e72df940000(0000) knlGS:0000000000000000\\n[ 905.938249] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[ 905.950067] nvmet_rdma: SEND for CQE 0x00000000c7356cca failed with status transport retry counter exceeded (12).\\n[ 905.961855] CR2: 0000000000000048 CR3: 000000678d010004 CR4: 00000000007706e0\\n[ 905.961855] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n[ 905.961856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\n[ 905.961857] PKRU: 55555554\\n[ 906.010315] Call Trace:\\n[ 906.012778] __ib_process_cq+0x89/0x170 [ib_core]\\n[ 906.017509] ib_cq_poll_work+0x26/0x80 [ib_core]\\n[ 906.022152] process_one_work+0x1a7/0x360\\n[ 906.026182] ? create_worker+0x1a0/0x1a0\\n[ 906.030123] worker_thread+0x30/0x390\\n[ 906.033802] ? create_worker+0x1a0/0x1a0\\n[ 906.037744] kthread+0x116/0x130\\n[ 906.040988] ? kthread_flush_work_fn+0x10/0x10\\n[ 906.045456] ret_from_fork+0x1f/0x40\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.38\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.11.22\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.5\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"5.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:01:42.969Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-46983\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:01:42.969Z\", \"dateReserved\": \"2024-02-27T18:42:55.946Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-28T08:13:12.223Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • 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.