CVE-2023-52473

CVE Details

Release Date:	2024-02-26
Impact:	Low	What is this?

Description

In the Linux kernel, the following vulnerability has been resolved:\nthermal: core: Fix NULL pointer dereference in zone registration error path\nIf device_register() in thermal_zone_device_register_with_trips()\nreturns an error, the tz variable is set to NULL and subsequently\ndereferenced in kfree(tz->tzp).\nCommit adc8749b150c ('thermal/drivers/core: Use put_device() if\ndevice_register() fails') added the tz = NULL assignment in question to\navoid a possible double-free after dropping the reference to the zone\ndevice. However, after commit 4649620d9404 ('thermal: core: Make\nthermal_zone_device_unregister() return after freeing the zone'), that\nassignment has become redundant, because dropping the reference to the\nzone device does not cause the zone object to be freed any more.\nDrop it to address the NULL pointer dereference.

See more information about CVE-2023-52473 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	2.3
Vector String:	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
Version:	3.1
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	High
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Low

Errata information

Platform	Errata	Release Date
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14