FKIE_CVE-2021-47076
Vulnerability from fkie_nvd - Published: 2024-03-01 22:15 - Updated: 2026-06-17 04:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Return CQE error if invalid lkey was supplied
RXE is missing update of WQE status in LOCAL_WRITE failures. This caused
the following kernel panic if someone sent an atomic operation with an
explicitly wrong lkey.
[leonro@vm ~]$ mkt test
test_atomic_invalid_lkey (tests.test_atomic.AtomicTest) ...
WARNING: CPU: 5 PID: 263 at drivers/infiniband/sw/rxe/rxe_comp.c:740 rxe_completer+0x1a6d/0x2e30 [rdma_rxe]
Modules linked in: crc32_generic rdma_rxe ip6_udp_tunnel udp_tunnel rdma_ucm rdma_cm ib_umad ib_ipoib iw_cm ib_cm mlx5_ib ib_uverbs ib_core mlx5_core ptp pps_core
CPU: 5 PID: 263 Comm: python3 Not tainted 5.13.0-rc1+ #2936
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
RIP: 0010:rxe_completer+0x1a6d/0x2e30 [rdma_rxe]
Code: 03 0f 8e 65 0e 00 00 3b 93 10 06 00 00 0f 84 82 0a 00 00 4c 89 ff 4c 89 44 24 38 e8 2d 74 a9 e1 4c 8b 44 24 38 e9 1c f5 ff ff <0f> 0b e9 0c e8 ff ff b8 05 00 00 00 41 bf 05 00 00 00 e9 ab e7 ff
RSP: 0018:ffff8880158af090 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888016a78000 RCX: ffffffffa0cf1652
RDX: 1ffff9200004b442 RSI: 0000000000000004 RDI: ffffc9000025a210
RBP: dffffc0000000000 R08: 00000000ffffffea R09: ffff88801617740b
R10: ffffed1002c2ee81 R11: 0000000000000007 R12: ffff88800f3b63e8
R13: ffff888016a78008 R14: ffffc9000025a180 R15: 000000000000000c
FS: 00007f88b622a740(0000) GS:ffff88806d540000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f88b5a1fa10 CR3: 000000000d848004 CR4: 0000000000370ea0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rxe_do_task+0x130/0x230 [rdma_rxe]
rxe_rcv+0xb11/0x1df0 [rdma_rxe]
rxe_loopback+0x157/0x1e0 [rdma_rxe]
rxe_responder+0x5532/0x7620 [rdma_rxe]
rxe_do_task+0x130/0x230 [rdma_rxe]
rxe_rcv+0x9c8/0x1df0 [rdma_rxe]
rxe_loopback+0x157/0x1e0 [rdma_rxe]
rxe_requester+0x1efd/0x58c0 [rdma_rxe]
rxe_do_task+0x130/0x230 [rdma_rxe]
rxe_post_send+0x998/0x1860 [rdma_rxe]
ib_uverbs_post_send+0xd5f/0x1220 [ib_uverbs]
ib_uverbs_write+0x847/0xc80 [ib_uverbs]
vfs_write+0x1c5/0x840
ksys_write+0x176/0x1d0
do_syscall_64+0x3f/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xae
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | 5.13 | |
| linux | linux_kernel | 5.13 |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/sw/rxe/rxe_comp.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "a81e72d49b0648f68ab201163dbfc7841056d7a2",
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"versionType": "git"
},
{
"lessThan": "abe31d25facdb9109fe2cf69890748295291570c",
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"versionType": "git"
},
{
"lessThan": "dc07628bd2bbc1da768e265192c28ebd301f509d",
"status": "affected",
"version": "8700e3e7c4857d28ebaa824509934556da0b3e76",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/sw/rxe/rxe_comp.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.8"
},
{
"lessThan": "4.8",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.241",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.12.*",
"status": "unaffected",
"version": "5.12.7",
"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": "86AEDEBB-6C6C-4840-B58E-520581A71F2F",
"versionEndExcluding": "5.12.7",
"versionStartIncluding": "4.8",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*",
"matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*",
"matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Return CQE error if invalid lkey was supplied\n\nRXE is missing update of WQE status in LOCAL_WRITE failures. This caused\nthe following kernel panic if someone sent an atomic operation with an\nexplicitly wrong lkey.\n\n[leonro@vm ~]$ mkt test\ntest_atomic_invalid_lkey (tests.test_atomic.AtomicTest) ...\n WARNING: CPU: 5 PID: 263 at drivers/infiniband/sw/rxe/rxe_comp.c:740 rxe_completer+0x1a6d/0x2e30 [rdma_rxe]\n Modules linked in: crc32_generic rdma_rxe ip6_udp_tunnel udp_tunnel rdma_ucm rdma_cm ib_umad ib_ipoib iw_cm ib_cm mlx5_ib ib_uverbs ib_core mlx5_core ptp pps_core\n CPU: 5 PID: 263 Comm: python3 Not tainted 5.13.0-rc1+ #2936\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n RIP: 0010:rxe_completer+0x1a6d/0x2e30 [rdma_rxe]\n Code: 03 0f 8e 65 0e 00 00 3b 93 10 06 00 00 0f 84 82 0a 00 00 4c 89 ff 4c 89 44 24 38 e8 2d 74 a9 e1 4c 8b 44 24 38 e9 1c f5 ff ff \u003c0f\u003e 0b e9 0c e8 ff ff b8 05 00 00 00 41 bf 05 00 00 00 e9 ab e7 ff\n RSP: 0018:ffff8880158af090 EFLAGS: 00010246\n RAX: 0000000000000000 RBX: ffff888016a78000 RCX: ffffffffa0cf1652\n RDX: 1ffff9200004b442 RSI: 0000000000000004 RDI: ffffc9000025a210\n RBP: dffffc0000000000 R08: 00000000ffffffea R09: ffff88801617740b\n R10: ffffed1002c2ee81 R11: 0000000000000007 R12: ffff88800f3b63e8\n R13: ffff888016a78008 R14: ffffc9000025a180 R15: 000000000000000c\n FS: 00007f88b622a740(0000) GS:ffff88806d540000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007f88b5a1fa10 CR3: 000000000d848004 CR4: 0000000000370ea0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n rxe_do_task+0x130/0x230 [rdma_rxe]\n rxe_rcv+0xb11/0x1df0 [rdma_rxe]\n rxe_loopback+0x157/0x1e0 [rdma_rxe]\n rxe_responder+0x5532/0x7620 [rdma_rxe]\n rxe_do_task+0x130/0x230 [rdma_rxe]\n rxe_rcv+0x9c8/0x1df0 [rdma_rxe]\n rxe_loopback+0x157/0x1e0 [rdma_rxe]\n rxe_requester+0x1efd/0x58c0 [rdma_rxe]\n rxe_do_task+0x130/0x230 [rdma_rxe]\n rxe_post_send+0x998/0x1860 [rdma_rxe]\n ib_uverbs_post_send+0xd5f/0x1220 [ib_uverbs]\n ib_uverbs_write+0x847/0xc80 [ib_uverbs]\n vfs_write+0x1c5/0x840\n ksys_write+0x176/0x1d0\n do_syscall_64+0x3f/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae"
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: RDMA/rxe: devuelve un error de CQE si se proporcion\u00f3 una clave lv\u00e1lida. A RXE le falta la actualizaci\u00f3n del estado de WQE en fallas LOCAL_WRITE. Esto provoc\u00f3 el siguiente p\u00e1nico en el kernel si alguien enviaba una operaci\u00f3n at\u00f3mica con una clave l expl\u00edcitamente incorrecta. [leonro@vm ~]$ mkt test test_atomic_invalid_lkey (tests.test_atomic.AtomicTest) ... ADVERTENCIA: CPU: 5 PID: 263 en drivers/infiniband/sw/rxe/rxe_comp.c:740 rxe_completer+0x1a6d/0x2e30 [rdma_rxe] M\u00f3dulos vinculados en: crc32_generic rdma_rxe ip6_udp_tunnel udp_tunnel rdma_ucm rdma_cm ib_umad ib_ipoib iw_cm ib_cm mlx5_ib ib_uverbs ib_core mlx5_core ptp pps_core CPU: 5 PID: 263 Comm: python3 No contaminado 5.13.0-rc 1+ #2936 Nombre del hardware: PC est\u00e1ndar QEMU (Q35 + ICH9, 2009 ), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 01/04/2014 RIP: 0010:rxe_completer+0x1a6d/0x2e30 [rdma_rxe] C\u00f3digo: 03 0f 8e 65 0e 00 00 3b 93 10 06 00 0 0 0f 84 82 0a 00 00 4c 89 ff 4c 89 44 24 38 e8 2d 74 a9 e1 4c 8b 44 24 38 e9 1c f5 ff ff \u0026lt;0f\u0026gt; 0b e9 0c e8 ff ff b8 05 00 00 00 41 bf 05 00 0 0 00 e9 ab e7 ff RSP: 0018:ffff8880158af090 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888016a78000 RCX: ffffffffa0cf1652 RDX: 1ffff9200004b442 RSI: 0000000 000000004 RDI: ffffc9000025a210 RBP: dffffc0000000000 R08: 00000000ffffffea R09: ffff88801617740b R10: ffffed1002c2ee81 R11: 0000000000000007 R12: ffff 88800f3b63e8 R13: ffff888016a78008 R14: ffffc9000025a180 R15: 000000000000000c FS: 00007f88b622a740(0000) GS:ffff88806d540000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES : 0000 CR0: 0000000080050033 CR2: 00007f88b5a1fa10 CR3: 000000000d848004 CR4: 0000000000370ea0 DR0: 00000000000000000 DR1: 00000000000000000 DR 2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas: rxe_do_task+0x130/0x230 [rdma_rxe] rxe_rcv+0xb11/0x1d f0 [rdma_rxe] rxe_loopback+0x157/0x1e0 [rdma_rxe] rxe_responder+0x5532/0x7620 [rdma_rxe] rxe_do_task+0x130/0x230 [rdma_rxe] rxe_rcv+0x9c8/0x1df0 [rdma_rxe] rxe_loopback+0x157/0x1e0 [rdma_rxe] rxe_requester+0x1efd/0x58c0 [rdma_rxe] rxe_do_task+0x130/0x230 [rdma_rxe] r xe_post_send+0x998/0x1860 [rdma_rxe] ib_uverbs_post_send+0xd5f/0x1220 [ib_uverbs ] ib_uverbs_write+0x847/0xc80 [ib_uverbs] vfs_write+0x1c5/0x840 ksys_write+0x176/0x1d0 do_syscall_64+0x3f/0x80 Entry_SYSCALL_64_after_hwframe+0x44/0xae"
}
],
"id": "CVE-2021-47076",
"lastModified": "2026-06-17T04:16:24.253",
"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"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-47076",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-03-07T17:09:55.049735Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-03-01T22:15:47.223",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/a81e72d49b0648f68ab201163dbfc7841056d7a2"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/abe31d25facdb9109fe2cf69890748295291570c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/dc07628bd2bbc1da768e265192c28ebd301f509d"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/abe31d25facdb9109fe2cf69890748295291570c"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/dc07628bd2bbc1da768e265192c28ebd301f509d"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
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.
Loading…
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.