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:…
Does this matter?
Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own.
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()
- CVSS 3.1
- 6.2 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.25% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1e434d2687e8bc0b3cdc9dd093c0e9047c0b4addPatch
- https://git.kernel.org/stable/c/653926205741add87a6cf452e21950eebc6ac10bPatch
- https://git.kernel.org/stable/c/f8dccc1bdea7e21b5ec06c957aef8831c772661cPatch
- https://git.kernel.org/stable/c/1e434d2687e8bc0b3cdc9dd093c0e9047c0b4addPatch
- https://git.kernel.org/stable/c/653926205741add87a6cf452e21950eebc6ac10bPatch
- https://git.kernel.org/stable/c/f8dccc1bdea7e21b5ec06c957aef8831c772661cPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.