CVE-2021-47480: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: before 4.4.292 (fixed in 4.4.292); from 4.5, before 4.9.290 (fixed in 4.9.290); from 4.10, before 4.14.255 (fixed in 4.14.255); from 4.15, before 4.19.216 (fixed in 4.19.216); from 4.20, before 5.4.158 (fixed in 5.4.158); from 5.5, before 5.10.78 (fixed in 5.10.78); …

Published 2024-05-22. Last modified 2026-06-17.