CVE-2021-47198
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 fo…
Impact
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 lpfc_mbx_cmpl_fc_reg_login().
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 5.14 before 5.15.5 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/79b20beccea3a3938a8500acef4e6b9d7c66142f
- https://git.kernel.org/stable/c/dbebf865b3239595c1d4dba063b122862583b52a
- https://git.kernel.org/stable/c/79b20beccea3a3938a8500acef4e6b9d7c66142f
- https://git.kernel.org/stable/c/dbebf865b3239595c1d4dba063b122862583b52a