CVE-2024-46842 (GCVE-0-2024-46842)
Vulnerability from cvelistv5
Published
2024-09-27 12:39
Modified
2026-05-11 20:37
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 479b0917e4477f49df2e3be454aac3cfa5dec171
Version: 479b0917e4477f49df2e3be454aac3cfa5dec171
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info\n\nThe MBX_TIMEOUT return code is not handled in lpfc_get_sfp_info and the\nroutine unconditionally frees submitted mailbox commands regardless of\nreturn status.  The issue is that for MBX_TIMEOUT cases, when firmware\nreturns SFP information at a later time, that same mailbox memory region\nreferences previously freed memory in its cmpl routine.\n\nFix by adding checks for the MBX_TIMEOUT return code.  During mailbox\nresource cleanup, check the mbox flag to make sure that the wait did not\ntimeout.  If the MBOX_WAKE flag is not set, then do not free the resources\nbecause it will be freed when firmware completes the mailbox at a later\ntime in its cmpl routine.\n\nAlso, increase the timeout from 30 to 60 seconds to accommodate boot\nscripts requiring longer timeouts."
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