// For flags

CVE-2021-47480

scsi: core: Put LLD module refcnt after SCSI device is released

Severity Score

4.7
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Put LLD module refcnt after SCSI device is released SCSI host release is triggered when SCSI device is freed. We have to make
sure that the low-level device driver module won't be unloaded before SCSI
host instance is released because shost->hostt is required in the release
handler. Make sure to put LLD module refcnt after SCSI device is released. Fixes a kernel panic of 'BUG: unable to handle page fault for address'
reported by Changhui and Yi.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: core: colocar el módulo LLD refcnt después de liberar el dispositivo SCSI. La liberación del host SCSI se activa cuando se libera el dispositivo SCSI. Tenemos que asegurarnos de que el módulo del controlador de dispositivo de bajo nivel no se descargue antes de que se lance la instancia del host SCSI porque se requiere shost->hostt en el controlador de lanzamiento. Asegúrese de poner el módulo LLD refcnt después de lanzar el dispositivo SCSI. Corrige un problema de pánico del kernel de 'ERROR: no se puede manejar el error de página para la dirección' informado por Changhui y Yi.

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Put LLD module refcnt after SCSI device is released SCSI host release is triggered when SCSI device is freed. We have to make sure that the low-level device driver module won't be unloaded before SCSI host instance is released because shost->hostt is required in the release handler. Make sure to put LLD module refcnt after SCSI device is released. Fixes a kernel panic of 'BUG: unable to handle page fault for address' reported by Changhui and Yi.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
High
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-05-22 CVE Reserved
  • 2024-05-22 CVE Published
  • 2024-12-19 CVE Updated
  • 2025-03-18 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 4.4.292
Search vendor "Linux" for product "Linux Kernel" and version " < 4.4.292"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 4.9.290
Search vendor "Linux" for product "Linux Kernel" and version " < 4.9.290"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 4.14.255
Search vendor "Linux" for product "Linux Kernel" and version " < 4.14.255"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 4.19.216
Search vendor "Linux" for product "Linux Kernel" and version " < 4.19.216"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 5.4.158
Search vendor "Linux" for product "Linux Kernel" and version " < 5.4.158"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 5.10.78
Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.78"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 5.14.17
Search vendor "Linux" for product "Linux Kernel" and version " < 5.14.17"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 5.15
Search vendor "Linux" for product "Linux Kernel" and version " < 5.15"
en
Affected