# CVE-2021-47480: linux: In the Linux kernel, the following vulnerability has been resolved:  scsi: core: Put LLD module refcnt after SCSI dev...

CVE-2021-47480 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47480, released May 22, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47480
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 22, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  scsi: core: Put LLD module refcnt after SCSI device is released  SCSI host release is triggered when SCSI device is freed. We have to make sure that the low-level device driver module won't be unloaded before SCSI host instance is released because shost->hostt is required in the release handler.  Make sure to put LLD module refcnt after SCSI device is released.  Fixes a kernel panic of 'BUG: unable to handle page fault for address' reported by Changhui and Yi.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.15.3-1 | [DEBIAN-CVE-2021-47480](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47480.md) | May 22, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.15.3-1 | [DEBIAN-CVE-2021-47480](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47480.md) | May 22, 2024 |
| Linux | linux Debian 14 | 5.15.3-1 | [DEBIAN-CVE-2021-47480](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47480.md) | May 22, 2024 |

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