CVE-2021-47203: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() When parsing the txq list in lpfc_drain_txq(), the driver attempts to pass the requests to the adapter. If such an attempt fails, a local "fail_msg" string is set and a log message output. The job is then added to a completions list for cancellation. Processing of any further jobs from the txq list continues, but since "fail_msg" remains set, jobs are added to the completions list regardless of whether a wqe was passed to the adapter. If successfully added to txcmplq, jobs are added to both lists resulting in list corruption. Fix by clearing the fail_msg string after adding a job to the completions list. This stops the subsequent jobs from being added to the completions list unless they had an appropriate failure.

Affected products

• Linux Linux Kernel: before 4.4.293 (fixed in 4.4.293); from 4.5, before 4.9.291 (fixed in 4.9.291); from 4.10, before 4.14.256 (fixed in 4.14.256); from 4.15, before 4.19.218 (fixed in 4.19.218); from 4.20, before 5.4.162 (fixed in 5.4.162); from 5.5, before 5.10.82 (fixed in 5.10.82); …

Published 2024-04-10. Last modified 2026-08-04.