CVE-2021-47198

published 2024-04-10

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…

Priority P3 37 high 7.8 CVSS 3.1

AV L AC L PR L UI N S U C H I H A H

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

8 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.15.5-1 (bookworm)	linux 5.15.5-1 (bookworm)
linux	linux	—	—
linux	linux	>= fe83e3b9b422ac8ece2359c7b7290efe7f0335a2 < dbebf865b3239595c1d4dba063b122862583b52a	dbebf865b3239595c1d4dba063b122862583b52a
linux	linux	>= fe83e3b9b422ac8ece2359c7b7290efe7f0335a2 < 79b20beccea3a3938a8500acef4e6b9d7c66142f	79b20beccea3a3938a8500acef4e6b9d7c66142f
linux	linux_kernel	>= 0 < 5.15.5-1	5.15.5-1
linux	linux_kernel	>= 0 < 5.15.5-1	5.15.5-1
linux	linux_kernel	>= 0 < 5.15.5-1	5.15.5-1
linux	linux_kernel	>= 5.14 < 5.15.5	5.15.5

CVSS provenance

nvd v3.1 7.8 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

osv 7.8 HIGH

vendor_debian 7.8 HIGH

vendor_redhat 7.8 HIGH

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