CVE-2021-46983 (GCVE-0-2021-46983)
Vulnerability from cvelistv5 – Published: 2024-02-28 08:13 – Updated: 2026-08-05 08:45
VLAI
EPSS
VEX
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 The cq_context is no longer valid after the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
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-02-28 19:05 UTC
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
ca0f1a8055be2a04073af435dc68419334481638 , < 64f3410c7bfc389b1a58611d0799f4a36ce4b6b5
(git)
Affected: ca0f1a8055be2a04073af435dc68419334481638 , < 17fb6dfa5162b89ecfa07df891a53afec321abe8 (git) Affected: ca0f1a8055be2a04073af435dc68419334481638 , < 5bdb34466ad8370546dfa0497594fb1d6f2fed90 (git) Affected: ca0f1a8055be2a04073af435dc68419334481638 , < 8cc365f9559b86802afc0208389f5c8d46b4ad61 (git) |
guessed | |
| 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) |
guessed |
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"title": "nvmet-rdma: Fix NULL deref when SEND is completed with error",
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"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"
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{
"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",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"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",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2024-02-28T09:15:37.410",
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"url": "https://git.kernel.org/stable/c/5bdb34466ad8370546dfa0497594fb1d6f2fed90"
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"url": "https://git.kernel.org/stable/c/17fb6dfa5162b89ecfa07df891a53afec321abe8"
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{
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"tags": [
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"url": "https://git.kernel.org/stable/c/5bdb34466ad8370546dfa0497594fb1d6f2fed90"
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"tags": [
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"url": "https://git.kernel.org/stable/c/64f3410c7bfc389b1a58611d0799f4a36ce4b6b5"
},
{
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"tags": [
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],
"url": "https://git.kernel.org/stable/c/8cc365f9559b86802afc0208389f5c8d46b4ad61"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/nvme/target/rdma.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "64f3410c7bfc389b1a58611d0799f4a36ce4b6b5",
"status": "affected",
"version": "ca0f1a8055be2a04073af435dc68419334481638",
"versionType": "git"
},
{
"lessThan": "17fb6dfa5162b89ecfa07df891a53afec321abe8",
"status": "affected",
"version": "ca0f1a8055be2a04073af435dc68419334481638",
"versionType": "git"
},
{
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"status": "affected",
"version": "ca0f1a8055be2a04073af435dc68419334481638",
"versionType": "git"
},
{
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"status": "affected",
"version": "ca0f1a8055be2a04073af435dc68419334481638",
"versionType": "git"
}
]
},
{
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"product": "Linux",
"programFiles": [
"drivers/nvme/target/rdma.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.9"
},
{
"lessThan": "5.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.38",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.11.*",
"status": "unaffected",
"version": "5.11.22",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.12.*",
"status": "unaffected",
"version": "5.12.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.13",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B7EA3F8B-B23D-4BE1-96D5-42EE22A3BBF7",
"versionEndExcluding": "5.10.38",
"versionStartIncluding": "5.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "83B53E9A-F426-4C03-9A5F-A931FF79827E",
"versionEndExcluding": "5.11.22",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0274929A-B36C-4F4C-AB22-30A0DD6B995B",
"versionEndExcluding": "5.12.5",
"versionStartIncluding": "5.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*",
"matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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] ret_from_fork+0x1f/0x40"
}
],
"id": "CVE-2021-46983",
"lastModified": "2026-08-04T10:16:39.643",
"metrics": {
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{
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
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{
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"confidentialityImpact": "NONE",
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"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",
"version": "3.1"
},
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"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
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"options": [
{
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},
{
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2024-02-28T19:05:12.428400Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-02-28T09:15:37.410",
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{
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"tags": [
"Patch"
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"url": "https://git.kernel.org/stable/c/8cc365f9559b86802afc0208389f5c8d46b4ad61"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-04T21:37:27+00:00",
"cve": "CVE-2021-46983",
"id": "CVE-2021-46983",
"initial_release_date": "2021-01-01T00:00:00+00:00",
"product_status:fixed": "120",
"product_status:known_affected": "58",
"product_status:known_not_affected": "108",
"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": "2026-09-13T00:02:10Z",
"cve": "CVE-2021-46983",
"id": "CVE-2021-46983",
"initial_release_date": "2024-03-01T04:08:00Z",
"product_status:known_affected": "388",
"product_status:known_not_affected": "320",
"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": "45"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T05:24:37.886Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
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"url": "https://git.kernel.org/stable/c/8cc365f9559b86802afc0208389f5c8d46b4ad61"
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"title": "CVE Program Container"
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"metrics": [
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"other": {
"content": {
"id": "CVE-2021-46983",
"options": [
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"Exploitation": "none"
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{
"Automatable": "no"
},
{
"Technical Impact": "partial"
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],
"role": "CISA Coordinator",
"timestamp": "2024-02-28T19:05:12.428400Z",
"version": "2.0.3"
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"providerMetadata": {
"dateUpdated": "2024-05-23T19:01:13.641Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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"cna": {
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{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"vendor": "Linux",
"versions": [
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"status": "affected",
"version": "5.9"
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{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
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{
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"status": "unaffected",
"version": "5.10.38",
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"version": "5.11.22",
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"status": "unaffected",
"version": "5.12.5",
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"status": "unaffected",
"version": "5.13",
"versionType": "original_commit_for_fix"
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"cpeApplicability": [
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"descriptions": [
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"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"
}
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"value": "AV:N - nvmet-rdma is an in-kernel NVMe over Fabrics RDMA target that listens via rdma_listen and accepts remote RDMA CM connect requests (RoCE/SoftRoCE/IPoIB), analogous to nvmet-tcp; a remote peer\u2019s traffic and link teardown reach the vulnerable SEND error path.\nAC:L - An attacker who connects, generates in-flight SEND responses, then drops the peer link can reliably produce IB_WC transport retry-exceeded completions; cq_context is always NULL under the shared CQ pool, so the NULL deref is deterministic.\nPR:N - RDMA CM connect is accepted before NVMe host allowlisting or optional DH-HMAC-CHAP; Connect (even rejected) still posts a response SEND, so an unauthenticated network peer can trigger the error-completion path without local OS privileges.\nUI:N - Exploitation requires only attacker-controlled RDMA connect/traffic and link disruption against an enabled nvmet-rdma port; no victim user action is needed.\nS:U - The bug causes a kernel oops in the target\u2019s RDMA completion worker within the same host kernel security authority and does not cross VM, IOMMU, or sandbox boundaries.\nC:N - This is a pure NULL pointer dereference of cq-\u003ecq_context (always NULL for shared CQs); the oops occurs immediately in nvmet_rdma_error_comp with no information disclosure or memory-read primitive.\nI:N - There is no memory corruption, write primitive, or control-flow hijack\u2014only a NULL dereference crash\u2014so integrity impact is none.\nA:H - The NULL deref produces a kernel oops/BUG in the IB CQ workqueue path (as shown in the commit), which can panic or otherwise deny service on the NVMe target host."
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"url": "https://git.kernel.org/stable/c/17fb6dfa5162b89ecfa07df891a53afec321abe8"
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"title": "nvmet-rdma: Fix NULL deref when SEND is completed with error",
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"assignerShortName": "Linux",
"cveId": "CVE-2021-46983",
"datePublished": "2024-02-28T08:13:12.223Z",
"dateReserved": "2024-02-27T18:42:55.946Z",
"dateUpdated": "2026-08-05T08:45:22.499Z",
"state": "PUBLISHED"
},
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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