# CVE-2021-47503: linux: In the Linux kernel, the following vulnerability has been resolved:  scsi: pm80xx: Do not call scsi_remove_host() in...

CVE-2021-47503 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47503, released May 24, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47503
- Priority: Routine
- CVSS: 6.2 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 24, 2024

## 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()

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.15.15-1 | [DEBIAN-CVE-2021-47503](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47503.md) | May 24, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.15.15-1 | [DEBIAN-CVE-2021-47503](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47503.md) | May 24, 2024 |
| Linux | linux Debian 14 | 5.15.15-1 | [DEBIAN-CVE-2021-47503](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47503.md) | May 24, 2024 |

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