CVE-2023-53612

MEDIUM EPSS 3.2%
Published Oct 4, 20259mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 4, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (coretemp) Simplify platform device handling Coretemp's platform driver is unconventional. All the real work is done globally by the initcall and CPU hotplug notifiers, while the "driver" effectively just wraps an allocation and the registration of the hwmon interface in a long-winded round-trip through the driver core. The whole logic of dynamically creating and destroying platform devices to bring the interfaces up and down is error prone, since it assumes platform_device_add() will synchronously bind the driver and set drvdata before it returns, thus results in a NULL dereference if drivers_autoprobe is turned off for the platform bus. Furthermore, the unusual approach of doing that from within a CPU hotplug notifier, already commented in the code that it deadlocks suspend, also causes lockdep issues for other drivers or subsystems which may want to legitimately register a CPU hotplug notifier from a platform bus notifier. All of these issues can be solved by ripping this unusual behaviour out completely, simply tying the platform devices to the lifetime of the module itself, and directly managing the hwmon interfaces from the hotplug notifiers. There is a slight user-visible change in that /sys/bus/platform/drivers/coretemp will no longer appear, and /sys/devices/platform/coretemp.n will remain present if package n is hotplugged off, but hwmon users should really only be looking for the presence of the hwmon interfaces, whose behaviour remains unchanged.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥4.10  –  <5.4.235
linuxlinux_kernel*≥5.5  –  <5.10.173
linuxlinux_kernel*≥5.11  –  <5.15.99
linuxlinux_kernel*≥5.16  –  <6.1.16
linuxlinux_kernel*≥6.2  –  <6.2.3

References 6

  • git.kernel.org https://git.kernel.org/stable/c/4000384684f612b3645a944f6acde0e65ac370b8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/52ea47a0ddfbc5fe05e873d3f5a59db4ba3e03fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5735878a7b7db7e9ce731cb36cec298a9de67549
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6d03bbff456befeccdd4d663177c4d6c75d0c4ff
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8fcdbc4bc01365f4b10fed7db544a3149e3054fd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c57a8d14d7880521150ee801d53a0a64fdffd9c8
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/4000384684f612b3645a944f6acde0e65ac370b8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/52ea47a0ddfbc5fe05e873d3f5a59db4ba3e03fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5735878a7b7db7e9ce731cb36cec298a9de67549
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6d03bbff456befeccdd4d663177c4d6c75d0c4ff
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8fcdbc4bc01365f4b10fed7db544a3149e3054fd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c57a8d14d7880521150ee801d53a0a64fdffd9c8
    Patch