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 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().

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/79b20beccea3a3938a8500acef4e6b9d7c66142f	Patch
https://git.kernel.org/stable/c/dbebf865b3239595c1d4dba063b122862583b52a	Patch
https://git.kernel.org/stable/c/79b20beccea3a3938a8500acef4e6b9d7c66142f	Patch
https://git.kernel.org/stable/c/dbebf865b3239595c1d4dba063b122862583b52a	Patch

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

History

21 Nov 2024, 06:35

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: lpfc: Fix use-after-free en la rutina lpfc_unreg_rpi() Se detecta un error con el siguiente reporte al descargar el driver: "KASAN: use-after-free en lpfc_unreg_rpi +0x1b1b" El NLP_REG_LOGIN_SEND nlp_flag está configurado en lpfc_reg_fab_ctrl_node(), pero el indicador no se borra al finalizar el inicio de sesión. Esto permite una segunda llamada a lpfc_unreg_rpi() para continuar con nlp_rpi configurado en LPFC_RPI_ALLOW_ERROR. Esto da como resultado un acceso de use after free cuando se usa como índice de matriz rpi_ids. Para solucionarlo, borre NLP_REG_LOGIN_SEND nlp_flag en lpfc_mbx_cmpl_fc_reg_login().
References	~~() https://git.kernel.org/stable/c/79b20beccea3a3938a8500acef4e6b9d7c66142f - Patch~~	() https://git.kernel.org/stable/c/79b20beccea3a3938a8500acef4e6b9d7c66142f - Patch
References	~~() https://git.kernel.org/stable/c/dbebf865b3239595c1d4dba063b122862583b52a - Patch~~	() https://git.kernel.org/stable/c/dbebf865b3239595c1d4dba063b122862583b52a - Patch

19 Apr 2024, 19:15

Type	Values Removed	Values Added
First Time		Linux Linux linux Kernel
References	~~() https://git.kernel.org/stable/c/79b20beccea3a3938a8500acef4e6b9d7c66142f -~~	() https://git.kernel.org/stable/c/79b20beccea3a3938a8500acef4e6b9d7c66142f - Patch
References	~~() https://git.kernel.org/stable/c/dbebf865b3239595c1d4dba063b122862583b52a -~~	() https://git.kernel.org/stable/c/dbebf865b3239595c1d4dba063b122862583b52a - Patch
CPE		cpe:2.3:o:linux:linux_kernel::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8
CWE		CWE-416

10 Apr 2024, 19:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-04-10 19:15

Updated : 2024-11-21 06:35

NVD link : CVE-2021-47198

Mitre link : CVE-2021-47198

CVE.ORG link : CVE-2021-47198

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

7.8 /10