CVE-2022-50381
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
md: fix a crash in mempool_free
There's a crash in mempool_free when running the lvm test shell/lvchange-rebuild-raid.sh.
We fix this bug by moving bio_put before atomic_dec_and_test.
We also move rdev_dec_pending before atomic_dec_and_test as suggested by Neil Brown.
The function md_end_flush has a similar bug - we must call bio_put before we decrement the number of in-progress bios.
Detalles técnicos trazas, registros y código del informe original
The reason for the crash is this: * super_written calls atomic_dec_and_test(&mddev->pending_writes) and wake_up(&mddev->sb_wait). Then it calls rdev_dec_pending(rdev, mddev) and bio_put(bio). * so, the process that waited on sb_wait and that is woken up is racing with bio_put(bio). * if the process wins the race, it calls bioset_exit before bio_put(bio) is executed. * bio_put(bio) attempts to free a bio into a destroyed bio set - causing a crash in mempool_free. BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 11557f0067 P4D 11557f0067 PUD 0 Oops: 0002 [#1] PREEMPT SMP CPU: 0 PID: 73 Comm: kworker/0:1 Not tainted 6.1.0-rc3 #5 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 Workqueue: kdelayd flush_expired_bios [dm_delay] RIP: 0010:mempool_free+0x47/0x80 Code: 48 89 ef 5b 5d ff e0 f3 c3 48 89 f7 e8 32 45 3f 00 48 63 53 08 48 89 c6 3b 53 04 7d 2d 48 8b 43 10 8d 4a 01 48 89 df 89 4b 08 <48> 89 2c d0 e8 b0 45 3f 00 48 8d 7b 30 5b 5d 31 c9 ba 01 00 00 00 RSP: 0018:ffff88910036bda8 EFLAGS: 00010093 RAX: 0000000000000000 RBX: ffff8891037b65d8 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000202 RDI: ffff8891037b65d8 RBP: ffff8891447ba240 R08: 0000000000012908 R09: 00000000003d0900 R10: 0000000000000000 R11: 0000000000173544 R12: ffff889101a14000 R13: ffff8891562ac300 R14: ffff889102b41440 R15: ffffe8ffffa00d05 FS: 0000000000000000(0000) GS:ffff88942fa00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000001102e99000 CR4: 00000000000006b0 Call Trace: <TASK> clone_endio+0xf4/0x1c0 [dm_mod] clone_endio+0xf4/0x1c0 [dm_mod] __submit_bio+0x76/0x120 submit_bio_noacct_nocheck+0xb6/0x2a0 flush_expired_bios+0x28/0x2f [dm_delay] process_one_work+0x1b4/0x300 worker_thread+0x45/0x3e0 ? rescuer_thread+0x380/0x380 kthread+0xc2/0x100 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x1f/0x30 </TASK> Modules linked in: brd dm_delay dm_raid dm_mod af_packet uvesafb cfbfillrect cfbimgblt cn cfbcopyarea fb font fbdev tun autofs4 binfmt_misc configfs ipv6 virtio_rng virtio_balloon rng_core virtio_net pcspkr net_failover failover qemu_fw_cfg button mousedev raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq raid6_pq async_xor xor async_tx raid1 raid0 md_mod sd_mod t10_pi crc64_rocksoft crc64 virtio_scsi scsi_mod evdev psmouse bsg scsi_common [last unloaded: brd] CR2: 0000000000000000 ---[ end trace 0000000000000000 ]---
CVSS
- 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: 0.16%
- Percentil entre todas las CVEs puntuadas: 4
- 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-476
- CWE-476
Referencias
- https://git.kernel.org/stable/c/341097ee53573e06ab9fc675d96a052385b851fa
- https://git.kernel.org/stable/c/384ef33d37cefb2ac539d44597d03f06c9b8975c
- https://git.kernel.org/stable/c/732cd66ec19a17f2b9183d7d5b7bdb9c39b0776e
- https://git.kernel.org/stable/c/842f222fc42a9239831e15b1fd49a51c546902cb
- https://git.kernel.org/stable/c/91bd504128a51776472445070e11a3b0f9348c90
- https://git.kernel.org/stable/c/97ce99984be12b9acb49ddce0f5d8ebb037adbb6
- https://git.kernel.org/stable/c/ae7793027766491c5f8635b12d15a5940d3b8698
- https://git.kernel.org/stable/c/b5be563b4356b3089b3245d024cae3f248ba7090
- https://git.kernel.org/stable/c/cf06b162f5b6337b688072a1a47941280b8f7110
JSON original (NVD)
Mostrar
{
"id": "CVE-2022-50381",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2022-50381",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-01-14T18:47:48.002807Z"
}
}
],
"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
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"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": "f8b58edf3acf0dcc186b8330939000ecf709368a",
"lessThan": "732cd66ec19a17f2b9183d7d5b7bdb9c39b0776e",
"versionType": "git"
},
{
"status": "affected",
"version": "f8b58edf3acf0dcc186b8330939000ecf709368a",
"lessThan": "cf06b162f5b6337b688072a1a47941280b8f7110",
"versionType": "git"
},
{
"status": "affected",
"version": "f8b58edf3acf0dcc186b8330939000ecf709368a",
"lessThan": "b5be563b4356b3089b3245d024cae3f248ba7090",
"versionType": "git"
},
{
"status": "affected",
"version": "f8b58edf3acf0dcc186b8330939000ecf709368a",
"lessThan": "384ef33d37cefb2ac539d44597d03f06c9b8975c",
"versionType": "git"
},
{
"status": "affected",
"version": "f8b58edf3acf0dcc186b8330939000ecf709368a",
"lessThan": "ae7793027766491c5f8635b12d15a5940d3b8698",
"versionType": "git"
},
{
"status": "affected",
"version": "f8b58edf3acf0dcc186b8330939000ecf709368a",
"lessThan": "91bd504128a51776472445070e11a3b0f9348c90",
"versionType": "git"
},
{
"status": "affected",
"version": "f8b58edf3acf0dcc186b8330939000ecf709368a",
"lessThan": "842f222fc42a9239831e15b1fd49a51c546902cb",
"versionType": "git"
},
{
"status": "affected",
"version": "f8b58edf3acf0dcc186b8330939000ecf709368a",
"lessThan": "97ce99984be12b9acb49ddce0f5d8ebb037adbb6",
"versionType": "git"
},
{
"status": "affected",
"version": "f8b58edf3acf0dcc186b8330939000ecf709368a",
"lessThan": "341097ee53573e06ab9fc675d96a052385b851fa",
"versionType": "git"
}
],
"programFiles": [
"drivers/md/md.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.13",
"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": "5.15.87",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.0.17",
"versionType": "semver",
"lessThanOrEqual": "6.0.*"
},
{
"status": "unaffected",
"version": "6.1.3",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/md/md.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-09-18T14:15:36.873",
"references": [
{
"url": "https://git.kernel.org/stable/c/341097ee53573e06ab9fc675d96a052385b851fa",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/384ef33d37cefb2ac539d44597d03f06c9b8975c",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/732cd66ec19a17f2b9183d7d5b7bdb9c39b0776e",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/842f222fc42a9239831e15b1fd49a51c546902cb",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/91bd504128a51776472445070e11a3b0f9348c90",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/97ce99984be12b9acb49ddce0f5d8ebb037adbb6",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ae7793027766491c5f8635b12d15a5940d3b8698",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b5be563b4356b3089b3245d024cae3f248ba7090",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cf06b162f5b6337b688072a1a47941280b8f7110",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-476"
}
]
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-476"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: fix a crash in mempool_free\n\nThere's a crash in mempool_free when running the lvm test\nshell/lvchange-rebuild-raid.sh.\n\nThe reason for the crash is this:\n* super_written calls atomic_dec_and_test(&mddev->pending_writes) and\n wake_up(&mddev->sb_wait). Then it calls rdev_dec_pending(rdev, mddev)\n and bio_put(bio).\n* so, the process that waited on sb_wait and that is woken up is racing\n with bio_put(bio).\n* if the process wins the race, it calls bioset_exit before bio_put(bio)\n is executed.\n* bio_put(bio) attempts to free a bio into a destroyed bio set - causing\n a crash in mempool_free.\n\nWe fix this bug by moving bio_put before atomic_dec_and_test.\n\nWe also move rdev_dec_pending before atomic_dec_and_test as suggested by\nNeil Brown.\n\nThe function md_end_flush has a similar bug - we must call bio_put before\nwe decrement the number of in-progress bios.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD 11557f0067 P4D 11557f0067 PUD 0\n Oops: 0002 [#1] PREEMPT SMP\n CPU: 0 PID: 73 Comm: kworker/0:1 Not tainted 6.1.0-rc3 #5\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014\n Workqueue: kdelayd flush_expired_bios [dm_delay]\n RIP: 0010:mempool_free+0x47/0x80\n Code: 48 89 ef 5b 5d ff e0 f3 c3 48 89 f7 e8 32 45 3f 00 48 63 53 08 48 89 c6 3b 53 04 7d 2d 48 8b 43 10 8d 4a 01 48 89 df 89 4b 08 <48> 89 2c d0 e8 b0 45 3f 00 48 8d 7b 30 5b 5d 31 c9 ba 01 00 00 00\n RSP: 0018:ffff88910036bda8 EFLAGS: 00010093\n RAX: 0000000000000000 RBX: ffff8891037b65d8 RCX: 0000000000000001\n RDX: 0000000000000000 RSI: 0000000000000202 RDI: ffff8891037b65d8\n RBP: ffff8891447ba240 R08: 0000000000012908 R09: 00000000003d0900\n R10: 0000000000000000 R11: 0000000000173544 R12: ffff889101a14000\n R13: ffff8891562ac300 R14: ffff889102b41440 R15: ffffe8ffffa00d05\n FS: 0000000000000000(0000) GS:ffff88942fa00000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000000 CR3: 0000001102e99000 CR4: 00000000000006b0\n Call Trace:\n <TASK>\n clone_endio+0xf4/0x1c0 [dm_mod]\n clone_endio+0xf4/0x1c0 [dm_mod]\n __submit_bio+0x76/0x120\n submit_bio_noacct_nocheck+0xb6/0x2a0\n flush_expired_bios+0x28/0x2f [dm_delay]\n process_one_work+0x1b4/0x300\n worker_thread+0x45/0x3e0\n ? rescuer_thread+0x380/0x380\n kthread+0xc2/0x100\n ? kthread_complete_and_exit+0x20/0x20\n ret_from_fork+0x1f/0x30\n </TASK>\n Modules linked in: brd dm_delay dm_raid dm_mod af_packet uvesafb cfbfillrect cfbimgblt cn cfbcopyarea fb font fbdev tun autofs4 binfmt_misc configfs ipv6 virtio_rng virtio_balloon rng_core virtio_net pcspkr net_failover failover qemu_fw_cfg button mousedev raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq raid6_pq async_xor xor async_tx raid1 raid0 md_mod sd_mod t10_pi crc64_rocksoft crc64 virtio_scsi scsi_mod evdev psmouse bsg scsi_common [last unloaded: brd]\n CR2: 0000000000000000\n ---[ end trace 0000000000000000 ]---"
}
],
"lastModified": "2026-06-17T05:23:23.350",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9FFBA9B5-26DC-4802-9A86-F7B886954E4A",
"versionEndExcluding": "4.9.337"
},
{
"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": "7B9E5B1C-CD46-4790-9500-615863850401",
"versionEndExcluding": "5.15.87",
"versionStartIncluding": "5.11"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "05B2AE8A-556C-47C1-9119-DBAC5EB60947",
"versionEndExcluding": "6.0.17",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "70594F60-3413-4969-AFD7-965266760EA6",
"versionEndExcluding": "6.1.3",
"versionStartIncluding": "6.1"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}