Riskcovery

CVE-2021-47503

scsi: pm80xx: Do not call scsi_remove_host() in pm8001_alloc()

State
Published
Severity
6.2 Medium
Published
May 24, 2024
Updated
May 11, 2026
Reserved
May 22, 2024

Read the record on cve.org

Description

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()

Scores

CVSSScoreVectorSource
3.16.2 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCISA-ADP

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • 05c6c029a44d9f43715577e33e95eba87f44d285 to before 1e434d2687e8bc0b3cdc9dd093c0e9047c0b4addAffected
  • 05c6c029a44d9f43715577e33e95eba87f44d285 to before f8dccc1bdea7e21b5ec06c957aef8831c772661cAffected
  • 05c6c029a44d9f43715577e33e95eba87f44d285 to before 653926205741add87a6cf452e21950eebc6ac10bAffected
LinuxLinux
  • 5.10Affected
  • before 5.10Not affected
  • 5.10.85 through 5.10.*Not affected
  • 5.15.8 through 5.15.*Not affected
  • 5.16 and laterNot affected

References

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