CVE-2023-52473

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2023-52473
In the Linux kernel, the following vulnerability has been resolved: thermal: core: Fix NULL pointer dereference in zone registration error path If device_register() in thermal_zone_device_register_with_trips() returns an error, the tz variable is set to NULL and subsequently dereferenced in kfree(tz->tzp). Commit adc8749b150c ("thermal/drivers/core: Use put_device() if device_register() fails") added the tz = NULL assignment in question to avoid a possible double-free after dropping the reference to the zone device. However, after commit 4649620d9404 ("thermal: core: Make thermal_zone_device_unregister() return after freeing the zone"), that assignment has become redundant, because dropping the reference to the zone device does not cause the zone object to be freed any more. Drop it to address the NULL pointer dereference.

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/02871710b93058eb1249d5847c0b2d1c2c3c98ae Patch
https://git.kernel.org/stable/c/04e6ccfc93c5a1aa1d75a537cf27e418895e20ea Patch
https://git.kernel.org/stable/c/335176dd8ebaca6493807dceea33c478305667fa Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

17 Apr 2024, 18:30

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-476
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/02871710b93058eb1249d5847c0b2d1c2c3c98ae - () https://git.kernel.org/stable/c/02871710b93058eb1249d5847c0b2d1c2c3c98ae - Patch
References () https://git.kernel.org/stable/c/04e6ccfc93c5a1aa1d75a537cf27e418895e20ea - () https://git.kernel.org/stable/c/04e6ccfc93c5a1aa1d75a537cf27e418895e20ea - Patch
References () https://git.kernel.org/stable/c/335176dd8ebaca6493807dceea33c478305667fa - () https://git.kernel.org/stable/c/335176dd8ebaca6493807dceea33c478305667fa - Patch
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Thermal: Core: corrige la desreferencia del puntero NULL en la ruta del error de registro de zona. Si device_register() en Thermal_zone_device_register_with_trips() devuelve un error, la variable tz se establece en NULL y posteriormente se desreferencia en kfree( tz->tzp). el commit adc8749b150c ("thermal/drivers/core: use put_device() si falla el dispositivo_register()") agregó la asignación tz = NULL en cuestión para evitar una posible doble liberación después de eliminar la referencia al dispositivo de zona. Sin embargo, después de el commit 4649620d9404 ("thermal: core: Make Thermal_zone_device_unregister() return después de liberar la zona"), esa asignación se ha vuelto redundante, porque eliminar la referencia al dispositivo de zona ya no causa que el objeto de zona se libere más. Suéltelo para abordar la desreferencia del puntero NULL.

26 Feb 2024, 16:32

Type Values Removed Values Added
New CVE
Information

Published : 2024-02-26 16:27

Updated : 2024-04-17 18:30

NVD link : CVE-2023-52473

Mitre link : CVE-2023-52473

CVE.ORG link : CVE-2023-52473

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference