CVE-2021-47203

scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()

MEDIUM

5.5

CVSS Score

Published: April 10, 2024 at 06:56 PM UTC

Updated: August 5, 2026 at 09:24 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

v < 4.4.2932.6.36 ≤ v < 4.14.2562.6.36 ≤ v < 4.19.2182.6.36 ≤ v < 4.4.2932.6.36 ≤ v < 4.9.2912.6.36 ≤ v < 5.10.822.6.36 ≤ v < 5.15.52.6.36 ≤ v < 5.162.6.36 ≤ v < 5.4.1624.10 ≤ v < 4.14.2564.15 ≤ v < 4.19.2184.20 ≤ v < 5.4.1624.5 ≤ v < 4.9.2915.11 ≤ v < 5.15.55.5 ≤ v < 5.10.822.6.362a9bf3d011303d8da64cd5e0e7fdd95f0c143984

Vendor states this is fixed in 16bcbfb56d759c25665f786e33ec633b9508a08f (fixed)

Vendor states this is fixed in 814d3610c4ce86e8cf285b2cdac0057a42e82de5 (fixed)

Vendor states this is fixed in 99154581b05c8fb22607afb7c3d66c1bace6aa5d (fixed)

Vendor states this is fixed in ad4776b5eb2e58af1226847fcd3b4f6d051674dd (fixed)

Vendor states this is fixed in b291d147d0268e93ad866f8bc820ea14497abc9b (fixed)

Vendor states this is fixed in c097bd5a59162156d9c2077a2f58732ffbaa9fca (fixed)

Vendor states this is fixed in ec70d80a8642900086447ba0cdc79e3f44d42e8f (fixed)

Vendor states this is fixed in f05a0191b90156e539cccc189b9d87ca2a4d9305 (fixed)

Vendor states this is fixed in 2.6.36 (unaffected)

Vendor states this is fixed in 4.14.256 (unaffected)

Vendor states this is fixed in 4.19.218 (unaffected)

Vendor states this is fixed in 4.4.293 (unaffected)