CVE-2021-47076 (GCVE-0-2021-47076)

Vulnerability from cvelistv5 – Published: 2024-03-01 21:15 – Updated: 2026-05-11 13:47
VLAI
Title
RDMA/rxe: Return CQE error if invalid lkey was supplied
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
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: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < a81e72d49b0648f68ab201163dbfc7841056d7a2 (git)
Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < abe31d25facdb9109fe2cf69890748295291570c (git)
Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < dc07628bd2bbc1da768e265192c28ebd301f509d (git)
Create a notification for this product.
Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.12.7 , ≤ 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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      "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": "2024-12-12T14:48:50.960",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}]}",
      "published": "2024-03-01T22:15:47.223",
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      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Analyzed",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"NVD-CWE-noinfo\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47076\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-01T22:15:47.223\",\"lastModified\":\"2026-06-17T04:16:24.253\",\"vulnStatus\":\"Modified\",\"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\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/infiniband/sw/rxe/rxe_comp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8700e3e7c4857d28ebaa824509934556da0b3e76\",\"lessThan\":\"a81e72d49b0648f68ab201163dbfc7841056d7a2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8700e3e7c4857d28ebaa824509934556da0b3e76\",\"lessThan\":\"abe31d25facdb9109fe2cf69890748295291570c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8700e3e7c4857d28ebaa824509934556da0b3e76\",\"lessThan\":\"dc07628bd2bbc1da768e265192c28ebd301f509d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/infiniband/sw/rxe/rxe_comp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.8\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.8\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.241\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.12.7\",\"lessThanOrEqual\":\"5.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.13\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-03-07T17:09:55.049735Z\",\"id\":\"CVE-2021-47076\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.8\",\"versionEndExcluding\":\"5.12.7\",\"matchCriteriaId\":\"86AEDEBB-6C6C-4840-B58E-520581A71F2F\"},{\"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\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/a81e72d49b0648f68ab201163dbfc7841056d7a2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"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\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"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\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T14:15:47+00:00",
      "cve": "CVE-2021-47076",
      "id": "CVE-2021-47076",
      "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: RDMA/rxe: Return CQE error if invalid lkey was supplied",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47076.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-25T17:35:57Z",
      "cve": "CVE-2021-47076",
      "id": "CVE-2021-47076",
      "initial_release_date": "2024-03-05T04:49:17Z",
      "product_status:known_affected": "455",
      "product_status:known_not_affected": "229",
      "product_status:recommended": "256",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-47076",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47076.json",
      "version": "44"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/abe31d25facdb9109fe2cf69890748295291570c\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/dc07628bd2bbc1da768e265192c28ebd301f509d\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T17:30:52.908Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47076\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-03-07T17:09:55.049735Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:16.358Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"RDMA/rxe: Return CQE error if invalid lkey was supplied\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\", \"lessThan\": \"a81e72d49b0648f68ab201163dbfc7841056d7a2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\", \"lessThan\": \"abe31d25facdb9109fe2cf69890748295291570c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\", \"lessThan\": \"dc07628bd2bbc1da768e265192c28ebd301f509d\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/infiniband/sw/rxe/rxe_comp.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.241\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/infiniband/sw/rxe/rxe_comp.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/a81e72d49b0648f68ab201163dbfc7841056d7a2\"}, {\"url\": \"https://git.kernel.org/stable/c/abe31d25facdb9109fe2cf69890748295291570c\"}, {\"url\": \"https://git.kernel.org/stable/c/dc07628bd2bbc1da768e265192c28ebd301f509d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.241\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.7\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"4.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T13:47:36.943Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47076\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T13:47:36.943Z\", \"dateReserved\": \"2024-02-29T22:33:44.297Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-01T21:15:13.395Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





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.