Vulnerability Details : CVE-2021-47503

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()
Published 2024-05-24 15:01:50
Updated 2024-07-03 01:38:04
Source Linux
View at NVD,   CVE.org
Vulnerability category: Memory Corruption

Products affected by CVE-2021-47503

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Exploit prediction scoring system (EPSS) score for CVE-2021-47503

EPSS FAQ
0.04%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 9 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-47503

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.2
 MEDIUM CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.5
3.6
 134c704f-9b21-4f2e-91b3-4a467353bcc0 2024-07-03

CWE ids for CVE-2021-47503

  • The product dereferences a pointer that it expects to be valid but is NULL.
    Assigned by: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

References for CVE-2021-47503

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