CVE-2022-50434
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
blk-mq: fix possible memleak when register 'hctx' failed
Fault injection context as follows: kobject_add blk_mq_register_hctx blk_mq_sysfs_register blk_register_queue device_add_disk null_add_dev.part.0 [null_blk]
As 'blk_mq_register_hctx' may already add some objects when failed halfway, but there isn't do fallback, caller don't know which objects add failed. To solve above issue just do fallback when add objects failed halfway in 'blk_mq_register_hctx'.
Detalles técnicos trazas, registros y código del informe original
There's issue as follows when do fault injection test:
unreferenced object 0xffff888132a9f400 (size 512):
comm "insmod", pid 308021, jiffies 4324277909 (age 509.733s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 f4 a9 32 81 88 ff ff ...........2....
08 f4 a9 32 81 88 ff ff 00 00 00 00 00 00 00 00 ...2............
backtrace:
[<00000000e8952bb4>] kmalloc_node_trace+0x22/0xa0
[<00000000f9980e0f>] blk_mq_alloc_and_init_hctx+0x3f1/0x7e0
[<000000002e719efa>] blk_mq_realloc_hw_ctxs+0x1e6/0x230
[<000000004f1fda40>] blk_mq_init_allocated_queue+0x27e/0x910
[<00000000287123ec>] __blk_mq_alloc_disk+0x67/0xf0
[<00000000a2a34657>] 0xffffffffa2ad310f
[<00000000b173f718>] 0xffffffffa2af824a
[<0000000095a1dabb>] do_one_initcall+0x87/0x2a0
[<00000000f32fdf93>] do_init_module+0xdf/0x320
[<00000000cbe8541e>] load_module+0x3006/0x3390
[<0000000069ed1bdb>] __do_sys_finit_module+0x113/0x1b0
[<00000000a1a29ae8>] do_syscall_64+0x35/0x80
[<000000009cd878b0>] entry_SYSCALL_64_after_hwframe+0x46/0xb0CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.18%
- Percentil entre todas las CVEs puntuadas: 7
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-401
Referencias
- https://git.kernel.org/stable/c/02bc8bc6eab03c84373281b85cb6e98747172ff7
- https://git.kernel.org/stable/c/33e8a3f61814ea30615d0fafaf50477975d6c1ca
- https://git.kernel.org/stable/c/4b7a21c57b14fbcd0e1729150189e5933f5088e9
- https://git.kernel.org/stable/c/4b7fafa5f39b15c3a6ca3b95e534d05d6904cc95
- https://git.kernel.org/stable/c/654870789c3c1b9763316ef1c71d7a449127b175
- https://git.kernel.org/stable/c/87fd18016a47ea8ae12641377a390172c4aa97a7
- https://git.kernel.org/stable/c/cb186eb47fb9dd327bdefa15f0c5fc55c53a40dd
- https://git.kernel.org/stable/c/e8022da1fa2fdf2fa204b445dd3354e7a66d085a
- https://git.kernel.org/stable/c/eff45bfbc25a2509a6362dea6e699e14083c693c
JSON original (NVD)
Mostrar
{
"id": "CVE-2022-50434",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "67aec14ce87fe25bdfff7dbf468556333df11c4e",
"lessThan": "654870789c3c1b9763316ef1c71d7a449127b175",
"versionType": "git"
},
{
"status": "affected",
"version": "67aec14ce87fe25bdfff7dbf468556333df11c4e",
"lessThan": "cb186eb47fb9dd327bdefa15f0c5fc55c53a40dd",
"versionType": "git"
},
{
"status": "affected",
"version": "67aec14ce87fe25bdfff7dbf468556333df11c4e",
"lessThan": "02bc8bc6eab03c84373281b85cb6e98747172ff7",
"versionType": "git"
},
{
"status": "affected",
"version": "67aec14ce87fe25bdfff7dbf468556333df11c4e",
"lessThan": "87fd18016a47ea8ae12641377a390172c4aa97a7",
"versionType": "git"
},
{
"status": "affected",
"version": "67aec14ce87fe25bdfff7dbf468556333df11c4e",
"lessThan": "e8022da1fa2fdf2fa204b445dd3354e7a66d085a",
"versionType": "git"
},
{
"status": "affected",
"version": "67aec14ce87fe25bdfff7dbf468556333df11c4e",
"lessThan": "eff45bfbc25a2509a6362dea6e699e14083c693c",
"versionType": "git"
},
{
"status": "affected",
"version": "67aec14ce87fe25bdfff7dbf468556333df11c4e",
"lessThan": "4b7fafa5f39b15c3a6ca3b95e534d05d6904cc95",
"versionType": "git"
},
{
"status": "affected",
"version": "67aec14ce87fe25bdfff7dbf468556333df11c4e",
"lessThan": "33e8a3f61814ea30615d0fafaf50477975d6c1ca",
"versionType": "git"
},
{
"status": "affected",
"version": "67aec14ce87fe25bdfff7dbf468556333df11c4e",
"lessThan": "4b7a21c57b14fbcd0e1729150189e5933f5088e9",
"versionType": "git"
}
],
"programFiles": [
"block/blk-mq-sysfs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.9.337",
"versionType": "semver",
"lessThanOrEqual": "4.9.*"
},
{
"status": "unaffected",
"version": "4.14.303",
"versionType": "semver",
"lessThanOrEqual": "4.14.*"
},
{
"status": "unaffected",
"version": "4.19.270",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.86",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.0.16",
"versionType": "semver",
"lessThanOrEqual": "6.0.*"
},
{
"status": "unaffected",
"version": "6.1.2",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"block/blk-mq-sysfs.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-10-01T12:15:35.267",
"references": [
{
"url": "https://git.kernel.org/stable/c/02bc8bc6eab03c84373281b85cb6e98747172ff7",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/33e8a3f61814ea30615d0fafaf50477975d6c1ca",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4b7a21c57b14fbcd0e1729150189e5933f5088e9",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4b7fafa5f39b15c3a6ca3b95e534d05d6904cc95",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/654870789c3c1b9763316ef1c71d7a449127b175",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/87fd18016a47ea8ae12641377a390172c4aa97a7",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cb186eb47fb9dd327bdefa15f0c5fc55c53a40dd",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e8022da1fa2fdf2fa204b445dd3354e7a66d085a",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/eff45bfbc25a2509a6362dea6e699e14083c693c",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-401"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: fix possible memleak when register 'hctx' failed\n\nThere's issue as follows when do fault injection test:\nunreferenced object 0xffff888132a9f400 (size 512):\n comm \"insmod\", pid 308021, jiffies 4324277909 (age 509.733s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 08 f4 a9 32 81 88 ff ff ...........2....\n 08 f4 a9 32 81 88 ff ff 00 00 00 00 00 00 00 00 ...2............\n backtrace:\n [<00000000e8952bb4>] kmalloc_node_trace+0x22/0xa0\n [<00000000f9980e0f>] blk_mq_alloc_and_init_hctx+0x3f1/0x7e0\n [<000000002e719efa>] blk_mq_realloc_hw_ctxs+0x1e6/0x230\n [<000000004f1fda40>] blk_mq_init_allocated_queue+0x27e/0x910\n [<00000000287123ec>] __blk_mq_alloc_disk+0x67/0xf0\n [<00000000a2a34657>] 0xffffffffa2ad310f\n [<00000000b173f718>] 0xffffffffa2af824a\n [<0000000095a1dabb>] do_one_initcall+0x87/0x2a0\n [<00000000f32fdf93>] do_init_module+0xdf/0x320\n [<00000000cbe8541e>] load_module+0x3006/0x3390\n [<0000000069ed1bdb>] __do_sys_finit_module+0x113/0x1b0\n [<00000000a1a29ae8>] do_syscall_64+0x35/0x80\n [<000000009cd878b0>] entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nFault injection context as follows:\n kobject_add\n blk_mq_register_hctx\n blk_mq_sysfs_register\n blk_register_queue\n device_add_disk\n null_add_dev.part.0 [null_blk]\n\nAs 'blk_mq_register_hctx' may already add some objects when failed halfway,\nbut there isn't do fallback, caller don't know which objects add failed.\nTo solve above issue just do fallback when add objects failed halfway in\n'blk_mq_register_hctx'."
}
],
"lastModified": "2026-06-17T05:23:32.970",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5522724B-B972-4CDA-9782-6ACEC2A639E4",
"versionEndExcluding": "4.9.337",
"versionStartIncluding": "3.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1E7450AD-4739-46F0-B81B-C02E7B35A97B",
"versionEndExcluding": "4.14.303",
"versionStartIncluding": "4.10"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "AE8904A3-99BE-4E49-9682-1F90A6373F4F",
"versionEndExcluding": "4.19.270",
"versionStartIncluding": "4.15"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A0C0D95E-414A-445E-941B-3EF6A4D3A093",
"versionEndExcluding": "5.4.229",
"versionStartIncluding": "4.20"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D05D31FC-BD74-4F9E-B1D8-9CED62BE6F65",
"versionEndExcluding": "5.10.163",
"versionStartIncluding": "5.5"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "47237296-55D1-4ED4-8075-D00FC85A61EE",
"versionEndExcluding": "5.15.86",
"versionStartIncluding": "5.11"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C720A569-3D93-4D77-95F6-E2B3A3267D9F",
"versionEndExcluding": "6.0.16",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "77239F4B-6BB2-4B9E-A654-36A52396116C",
"versionEndExcluding": "6.1.2",
"versionStartIncluding": "6.1"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}