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Vulnerability Change Records for CVE-2021-47198

Change History

New CVE Received by NIST 4/10/2024 3:15:47 PM

Action Type Old Value New Value
Added Description

In the Linux kernel, the following vulnerability has been resolved:

scsi: lpfc: Fix use-after-free in lpfc_unreg_rpi() routine

An error is detected with the following report when unloading the driver:
  "KASAN: use-after-free in lpfc_unreg_rpi+0x1b1b"

The NLP_REG_LOGIN_SEND nlp_flag is set in lpfc_reg_fab_ctrl_node(), but the
flag is not cleared upon completion of the login.

This allows a second call to lpfc_unreg_rpi() to proceed with nlp_rpi set
to LPFC_RPI_ALLOW_ERROR.  This results in a use after free access when used
as an rpi_ids array index.

Fix by clearing the NLP_REG_LOGIN_SEND nlp_flag in
Added Reference

kernel.org https://git.kernel.org/stable/c/79b20beccea3a3938a8500acef4e6b9d7c66142f [No types assigned]
Added Reference

kernel.org https://git.kernel.org/stable/c/dbebf865b3239595c1d4dba063b122862583b52a [No types assigned]