CVE-2021-46979

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-46979
In the Linux kernel, the following vulnerability has been resolved: iio: core: fix ioctl handlers removal Currently ioctl handlers are removed twice. For the first time during iio_device_unregister() then later on inside iio_device_unregister_eventset() and iio_buffers_free_sysfs_and_mask(). Double free leads to kernel panic. Fix this by not touching ioctl handlers list directly but rather letting code responsible for registration call the matching cleanup routine itself.

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/11e1cae5da4096552f7c091476cbadbc0d1817da Patch
https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1a Patch
https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303 Patch
https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817da Patch
https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1a Patch
https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303 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:5.13:rc1:*:*:*:*:*:*
History

31 Dec 2024, 16:02

Type Values Removed Values Added
CWE CWE-415
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817da - () https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817da - Patch
References () https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1a - () https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1a - Patch
References () https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303 - () https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303 - Patch

21 Nov 2024, 06:35

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: core: arreglar la eliminación de los controladores ioctl Actualmente, los controladores ioctl se eliminan dos veces. Por primera vez durante iio_device_unregister() y luego dentro de iio_device_unregister_eventset() y iio_buffers_free_sysfs_and_mask(). La doble liberación conduce al pánico en el kernel. Para solucionar este problema, no toque directamente la lista de controladores ioctl, sino que permita que el código responsable del registro llame a la rutina de limpieza coincidente.
References () https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817da - () https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817da -
References () https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1a - () https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1a -
References () https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303 - () https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303 -

28 Feb 2024, 09:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-02-28 09:15

Updated : 2024-12-31 16:02

NVD link : CVE-2021-46979

Mitre link : CVE-2021-46979

CVE.ORG link : CVE-2021-46979

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-415

Double Free