CVE-2023-53612: In the Linux kernel, the following vulnerability has been resolved: hwmon: (coretemp) Simplify platform device handling Coretemp's platform driver is…

PriorityP421medium5.5CVSS 3.1

AVLACLPRLUINSUCNINAH

EPSS

0.14%

3.4th percentile

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.

Affected

17 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 6.1.20-1 (bookworm)	linux 6.1.20-1 (bookworm)
linux	linux	—	—
linux	linux	>= e1b370b64031a01bb0c4158ce250073a88921fe1 < 4000384684f612b3645a944f6acde0e65ac370b8	4000384684f612b3645a944f6acde0e65ac370b8
linux	linux	>= e1b370b64031a01bb0c4158ce250073a88921fe1 < 5735878a7b7db7e9ce731cb36cec298a9de67549	5735878a7b7db7e9ce731cb36cec298a9de67549
linux	linux	>= e1b370b64031a01bb0c4158ce250073a88921fe1 < 52ea47a0ddfbc5fe05e873d3f5a59db4ba3e03fe	52ea47a0ddfbc5fe05e873d3f5a59db4ba3e03fe
linux	linux	>= e1b370b64031a01bb0c4158ce250073a88921fe1 < 8fcdbc4bc01365f4b10fed7db544a3149e3054fd	8fcdbc4bc01365f4b10fed7db544a3149e3054fd
linux	linux	>= e1b370b64031a01bb0c4158ce250073a88921fe1 < c57a8d14d7880521150ee801d53a0a64fdffd9c8	c57a8d14d7880521150ee801d53a0a64fdffd9c8
linux	linux	>= e1b370b64031a01bb0c4158ce250073a88921fe1 < 6d03bbff456befeccdd4d663177c4d6c75d0c4ff	6d03bbff456befeccdd4d663177c4d6c75d0c4ff
linux	linux_kernel	>= 0 < 5.10.178-1	5.10.178-1
linux	linux_kernel	>= 0 < 6.1.20-1	6.1.20-1
linux	linux_kernel	>= 0 < 6.1.20-1	6.1.20-1
linux	linux_kernel	>= 0 < 6.1.20-1	6.1.20-1
linux	linux_kernel	>= 4.10 < 5.4.235	5.4.235
linux	linux_kernel	>= 5.11 < 5.15.99	5.15.99
linux	linux_kernel	>= 5.16 < 6.1.16	6.1.16
linux	linux_kernel	>= 5.5 < 5.10.173	5.10.173
linux	linux_kernel	>= 6.2 < 6.2.3	6.2.3

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv5.5MEDIUM

vendor_debian5.5MEDIUM

vendor_redhat5.5MEDIUM

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