CVE-2021-47203

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 < ad4776b5eb2e58af1226847fcd3b4f6d051674ddaffected
LinuxLinux2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 < ec70d80a8642900086447ba0cdc79e3f44d42e8faffected
LinuxLinux2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 < f05a0191b90156e539cccc189b9d87ca2a4d9305affected
LinuxLinux2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 < b291d147d0268e93ad866f8bc820ea14497abc9baffected
LinuxLinux2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 < 16bcbfb56d759c25665f786e33ec633b9508a08faffected
LinuxLinux2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 < c097bd5a59162156d9c2077a2f58732ffbaa9fcaaffected
LinuxLinux2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 < 814d3610c4ce86e8cf285b2cdac0057a42e82de5affected
LinuxLinux2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 < 99154581b05c8fb22607afb7c3d66c1bace6aa5daffected
LinuxLinux2.6.36affected
LinuxLinux0 < 2.6.36unaffected
LinuxLinux4.4.293 <= 4.4.*unaffected
LinuxLinux4.9.291 <= 4.9.*unaffected
LinuxLinux4.14.256 <= 4.14.*unaffected
LinuxLinux4.19.218 <= 4.19.*unaffected
LinuxLinux5.4.162 <= 5.4.*unaffected
LinuxLinux5.10.82 <= 5.10.*unaffected
LinuxLinux5.15.5 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References