CVE-2021-47364

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47364
In the Linux kernel, the following vulnerability has been resolved: comedi: Fix memory leak in compat_insnlist() `compat_insnlist()` handles the 32-bit version of the `COMEDI_INSNLIST` ioctl (whenwhen `CONFIG_COMPAT` is enabled). It allocates memory to temporarily hold an array of `struct comedi_insn` converted from the 32-bit version in user space. This memory is only being freed if there is a fault while filling the array, otherwise it is leaked. Add a call to `kfree()` to fix the leak.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/8d6a21e4cd6a319b0662cbe4ad6199e276ac776a Patch
https://git.kernel.org/stable/c/bb509a6ffed2c8b0950f637ab5779aa818ed1596 Patch
https://git.kernel.org/stable/c/f217b6c1e28ed0b353634ce4d92a155b80bd1671 Patch
https://git.kernel.org/stable/c/8d6a21e4cd6a319b0662cbe4ad6199e276ac776a Patch
https://git.kernel.org/stable/c/bb509a6ffed2c8b0950f637ab5779aa818ed1596 Patch
https://git.kernel.org/stable/c/f217b6c1e28ed0b353634ce4d92a155b80bd1671 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
History

26 Dec 2024, 17:56

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/8d6a21e4cd6a319b0662cbe4ad6199e276ac776a - () https://git.kernel.org/stable/c/8d6a21e4cd6a319b0662cbe4ad6199e276ac776a - Patch
References () https://git.kernel.org/stable/c/bb509a6ffed2c8b0950f637ab5779aa818ed1596 - () https://git.kernel.org/stable/c/bb509a6ffed2c8b0950f637ab5779aa818ed1596 - Patch
References () https://git.kernel.org/stable/c/f217b6c1e28ed0b353634ce4d92a155b80bd1671 - () https://git.kernel.org/stable/c/f217b6c1e28ed0b353634ce4d92a155b80bd1671 - Patch
CWE CWE-401
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

21 Nov 2024, 06:35

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: comedi: Reparar pérdida de memoria en compat_insnlist() `compat_insnlist()` maneja la versión de 32 bits del ioctl `COMEDI_INSNLIST` (cuando `CONFIG_COMPAT` está habilitado). Asigna memoria para almacenar temporalmente una matriz de `struct comedi_insn` convertida desde la versión de 32 bits en el espacio de usuario. Esta memoria solo se libera si hay una falla al llenar la matriz; de lo contrario, se pierde. Agregue una llamada a `kfree()` para solucionar la fuga.
References () https://git.kernel.org/stable/c/8d6a21e4cd6a319b0662cbe4ad6199e276ac776a - () https://git.kernel.org/stable/c/8d6a21e4cd6a319b0662cbe4ad6199e276ac776a -
References () https://git.kernel.org/stable/c/bb509a6ffed2c8b0950f637ab5779aa818ed1596 - () https://git.kernel.org/stable/c/bb509a6ffed2c8b0950f637ab5779aa818ed1596 -
References () https://git.kernel.org/stable/c/f217b6c1e28ed0b353634ce4d92a155b80bd1671 - () https://git.kernel.org/stable/c/f217b6c1e28ed0b353634ce4d92a155b80bd1671 -

21 May 2024, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-21 15:15

Updated : 2024-12-26 17:56

NVD link : CVE-2021-47364

Mitre link : CVE-2021-47364

CVE.ORG link : CVE-2021-47364

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime