CVE-2021-47503 (GCVE-0-2021-47503)
Vulnerability from cvelistv5 – Published: 2024-05-24 15:01 – Updated: 2026-05-11 13:55
VLAI
EPSS
VEX
Title
scsi: pm80xx: Do not call scsi_remove_host() in pm8001_alloc()
Summary
In the Linux kernel, the following vulnerability has been resolved:
scsi: pm80xx: Do not call scsi_remove_host() in pm8001_alloc()
Calling scsi_remove_host() before scsi_add_host() results in a crash:
BUG: kernel NULL pointer dereference, address: 0000000000000108
RIP: 0010:device_del+0x63/0x440
Call Trace:
device_unregister+0x17/0x60
scsi_remove_host+0xee/0x2a0
pm8001_pci_probe+0x6ef/0x1b90 [pm80xx]
local_pci_probe+0x3f/0x90
We cannot call scsi_remove_host() in pm8001_alloc() because scsi_add_host()
has not been called yet at that point in time.
Function call tree:
pm8001_pci_probe()
|
`- pm8001_pci_alloc()
| |
| `- pm8001_alloc()
| |
| `- scsi_remove_host()
|
`- scsi_add_host()
Severity
6.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-28 15:53 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
10 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
05c6c029a44d9f43715577e33e95eba87f44d285 , < 1e434d2687e8bc0b3cdc9dd093c0e9047c0b4add
(git)
Affected: 05c6c029a44d9f43715577e33e95eba87f44d285 , < f8dccc1bdea7e21b5ec06c957aef8831c772661c (git) Affected: 05c6c029a44d9f43715577e33e95eba87f44d285 , < 653926205741add87a6cf452e21950eebc6ac10b (git) |
guessed | |
| Linux | Linux |
Affected:
5.10
Unaffected: 0 , < 5.10 (semver) Unaffected: 5.10.85 , ≤ 5.10.* (semver) Unaffected: 5.15.8 , ≤ 5.15.* (semver) Unaffected: 5.16 , ≤ * (original_commit_for_fix) |
guessed | |
| linux | linux_kernel |
Affected:
05c6c029a44d , < 1e434d2687e8
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
||
| linux | linux_kernel |
Affected:
05c6c029a44d , < f8dccc1bdea7
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
||
| linux | linux_kernel |
Affected:
f8dccc1bdea7 , < 653926205741
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
||
| linux | linux_kernel |
Unaffected:
0 , < 5.10
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
||
| linux | linux_kernel |
Unaffected:
5.10.85 , < 5.11
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
||
| linux | linux_kernel |
Unaffected:
5.15.8 , ≤ 5.16
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
||
| linux | linux_kernel |
Unaffected:
5.16
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
||
| linux | linux_kernel |
Affected:
5.10
cpe:2.3:o:linux:linux_kernel:5.10:-:*:*:*:*:*:* |
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`- scsi_remove_host()\\n |\\n `- scsi_add_host()\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: pm80xx: No llamar a scsi_remove_host() en pm8001_alloc() Llamar a scsi_remove_host() antes de scsi_add_host() produce un bloqueo: ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 00000000000000108 RIP : 0010:device_del+0x63/0x440 Seguimiento de llamadas: device_unregister+0x17/0x60 scsi_remove_host+0xee/0x2a0 pm8001_pci_probe+0x6ef/0x1b90 [pm80xx] local_pci_probe+0x3f/0x90 No podemos llamar a scsi_remove_host() en pm8001_ alloc() porque scsi_add_host() no lo ha hecho sido llamado todav\u00eda en ese momento. \u00c1rbol de llamadas a funciones: pm8001_pci_probe() | `- pm8001_pci_alloc() | | | `- pm8001_alloc() | | | `- scsi_remove_host() | `- 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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T14:33:33+00:00",
"cve": "CVE-2021-47503",
"id": "CVE-2021-47503",
"initial_release_date": "2021-01-01T00:00:00+00:00",
"product_status:known_affected": "42",
"product_status:known_not_affected": "156",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: scsi: pm80xx: Do not call scsi_remove_host() in pm8001_alloc()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47503.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-29T02:42:12Z",
"cve": "CVE-2021-47503",
"id": "CVE-2021-47503",
"initial_release_date": "2024-05-28T03:32:56Z",
"product_status:known_affected": "269",
"product_status:known_not_affected": "224",
"product_status:recommended": "543",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2021-47503",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47503.json",
"version": "55"
},
"vulnrichment": {
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\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"05c6c029a44d9f43715577e33e95eba87f44d285\", \"lessThan\": \"1e434d2687e8bc0b3cdc9dd093c0e9047c0b4add\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"05c6c029a44d9f43715577e33e95eba87f44d285\", \"lessThan\": \"f8dccc1bdea7e21b5ec06c957aef8831c772661c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"05c6c029a44d9f43715577e33e95eba87f44d285\", \"lessThan\": \"653926205741add87a6cf452e21950eebc6ac10b\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/scsi/pm8001/pm8001_init.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.85\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/scsi/pm8001/pm8001_init.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/1e434d2687e8bc0b3cdc9dd093c0e9047c0b4add\"}, {\"url\": \"https://git.kernel.org/stable/c/f8dccc1bdea7e21b5ec06c957aef8831c772661c\"}, {\"url\": \"https://git.kernel.org/stable/c/653926205741add87a6cf452e21950eebc6ac10b\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: pm80xx: Do not call scsi_remove_host() in pm8001_alloc()\\n\\nCalling scsi_remove_host() before scsi_add_host() results in a crash:\\n\\n BUG: kernel NULL pointer dereference, address: 0000000000000108\\n RIP: 0010:device_del+0x63/0x440\\n Call Trace:\\n device_unregister+0x17/0x60\\n scsi_remove_host+0xee/0x2a0\\n pm8001_pci_probe+0x6ef/0x1b90 [pm80xx]\\n local_pci_probe+0x3f/0x90\\n\\nWe cannot call scsi_remove_host() in pm8001_alloc() because scsi_add_host()\\nhas not been called yet at that point in time.\\n\\nFunction call tree:\\n\\n pm8001_pci_probe()\\n |\\n `- pm8001_pci_alloc()\\n | |\\n | `- pm8001_alloc()\\n | |\\n | `- scsi_remove_host()\\n |\\n `- scsi_add_host()\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.85\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.8\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\", \"versionStartIncluding\": \"5.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:12:25.934Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2021-47503\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:12:25.934Z\", \"dateReserved\": \"2024-05-22T06:20:56.205Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-24T15:01:50.358Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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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.
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.
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