What is CVE-2021-47503?

CVE-2021-47503 is a medium-severity vulnerability in Linux, classified under NULL Pointer Dereference. CVSS score: 6.2/10. Published 2024-05-24.

How severe is CVE-2021-47503?

Medium severity. CVSS v3 base score is 6.2 out of 10.

NULL pointer dereference in Linux

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()

EPSS: 0.002 (16.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 05c6c029a44d9f43715577e33e95eba87f44d285, 5.10, 0
Linux Linux_kernel — versions 5.16

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2021-47503?: CVE-2021-47503 is a medium-severity vulnerability in Linux, classified under NULL Pointer Dereference. CVSS score: 6.2/10. Published 2024-05-24.
How severe is CVE-2021-47503?: Medium severity. CVSS v3 base score is 6.2 out of 10.