scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info

Summary

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info The MBX_TIMEOUT return code is not handled in lpfc_get_sfp_info and the routine unconditionally frees submitted mailbox commands regardless of return status. The issue is that for MBX_TIMEOUT cases, when firmware returns SFP information at a later time, that same mailbox memory region references previously freed memory in its cmpl routine. Fix by adding checks for the MBX_TIMEOUT return code. During mailbox resource cleanup, check the mbox flag to make sure that the wait did not timeout. If the MBOX_WAKE flag is not set, then do not free the resources because it will be freed when firmware completes the mailbox at a later time in its cmpl routine. Also, increase the timeout from 30 to 60 seconds to accommodate boot scripts requiring longer timeouts.

Timeline

1. Sep 27, 2024, 12:39 PM UTCCVE published
2. Sep 29, 2024, 1:59 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 21, 2026, 12:35 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 479b0917e4477f49df2e3be454aac3cfa5dec171 · fixed in c6d8cce685d6088d795b29a0f47e6fd04548fd64; From 479b0917e4477f49df2e3be454aac3cfa5dec171 · fixed in bba47fe3b038cca3d3ebd799665ce69d6d273b58; From 479b0917e4477f49df2e3be454aac3cfa5dec171 · fixed in ede596b1434b57c0b3fd5c02b326efe5c54f6e48

• Linux Linux

  6.2

• KernelLinux

  From 6.2.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.10.10

References 3