CVE-2021-47357

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47357
In the Linux kernel, the following vulnerability has been resolved: atm: iphase: fix possible use-after-free in ia_module_exit() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.

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/1c72e6ab66b9598cac741ed397438a52065a8f1f Patch
https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417 Patch
https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479 Patch
https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42 Patch
https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8 Patch
https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29 Patch
https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51b Patch
https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297 Patch
https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8b Patch
https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1f Patch
https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417 Patch
https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479 Patch
https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42 Patch
https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8 Patch
https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29 Patch
https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51b Patch
https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297 Patch
https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8b 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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

26 Dec 2024, 19:30

Type Values Removed Values Added
CWE CWE-416
References () https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1f - () https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1f - Patch
References () https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417 - () https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417 - Patch
References () https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479 - () https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479 - Patch
References () https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42 - () https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42 - Patch
References () https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8 - () https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8 - Patch
References () https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29 - () https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29 - Patch
References () https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51b - () https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51b - Patch
References () https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297 - () https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297 - Patch
References () https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8b - () https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8b - Patch
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

21 Nov 2024, 06:35

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1f - () https://git.kernel.org/stable/c/1c72e6ab66b9598cac741ed397438a52065a8f1f -
References () https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417 - () https://git.kernel.org/stable/c/89ce0b0747f319eb70f85bc820dcc43cebbd5417 -
References () https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479 - () https://git.kernel.org/stable/c/9e161687855175334ca93c6c3ccb221731194479 -
References () https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42 - () https://git.kernel.org/stable/c/a832ee2f2145f57443b2d565f8cb5490e8339f42 -
References () https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8 - () https://git.kernel.org/stable/c/b58d246a058ae88484758cd4ab27b3180fd5ecf8 -
References () https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29 - () https://git.kernel.org/stable/c/bcdd2be48edd8c6867fb44112cb8d18086beae29 -
References () https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51b - () https://git.kernel.org/stable/c/c9172498d4d62c9b64e5fb37c1ee0343e65fe51b -
References () https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297 - () https://git.kernel.org/stable/c/d1fb12412874c94ad037e11d0ecdd1140a439297 -
References () https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8b - () https://git.kernel.org/stable/c/e759ff76ebbbfcdcf83b6634c54dc47828573d8b -
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: atm: iphase: corrige posible use after free en ia_module_exit(). La ruta de eliminación de este módulo llama a del_timer(). Sin embargo, esa función no espera hasta que finalice el controlador del temporizador. Esto significa que es posible que el controlador del temporizador aún esté ejecutándose después de que haya finalizado la función de eliminación del controlador, lo que daría como resultado un use after free. Para solucionarlo, llame a del_timer_sync(), lo que garantiza que el controlador del temporizador haya finalizado y no pueda reprogramarse.

21 May 2024, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-21 15:15

Updated : 2024-12-26 19:30

NVD link : CVE-2021-47357

Mitre link : CVE-2021-47357

CVE.ORG link : CVE-2021-47357

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

Use After Free