CVE-2022-49010

hwmon: (coretemp) Check for null before removing sysfs attrs

Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (coretemp) Check for null before removing sysfs attrs If coretemp_add_core() gets an error then pdata->core_data[indx] is already NULL and has been kfreed. Don't pass that to sysfs_remove_group() as that will crash in sysfs_remove_group(). [Shortened for readability] [91854.020159] sysfs: cannot create duplicate filename '/devices/platform/coretemp.0/hwmon/hwmon2/temp20_label' <cpu offline> [91855.126115] BUG: kernel NULL pointer dereference, address: 0000000000000188 [91855.165103] #PF: supervisor read access in kernel mode [91855.194506] #PF: error_code(0x0000) - not-present page [91855.224445] PGD 0 P4D 0 [91855.238508] Oops: 0000 [#1] PREEMPT SMP PTI ... [91855.342716] RIP: 0010:sysfs_remove_group+0xc/0x80 ... [91855.796571] Call Trace: [91855.810524] coretemp_cpu_offline+0x12b/0x1dd [coretemp] [91855.841738] ? coretemp_cpu_online+0x180/0x180 [coretemp] [91855.871107] cpuhp_invoke_callback+0x105/0x4b0 [91855.893432] cpuhp_thread_fun+0x8e/0x150 ... Fix this by checking for NULL first.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/fb503d077ff7b43913503eaf72995d1239028b99 patch
https://git.kernel.org/stable/c/070d5ea4a0592a37ad96ce7f7b6b024f90bb009f patch
https://git.kernel.org/stable/c/280110db1a7d62ad635b103bafc3ae96e8bef75c patch
https://git.kernel.org/stable/c/89eecabe6a47403237f45aafd7d24f93cb973653 patch
https://git.kernel.org/stable/c/f06e0cd01eab954bd5f2190c9faa79bb5357e05b patch
https://git.kernel.org/stable/c/7692700ac818866d138a8de555130a6e70e6ac16 patch
https://git.kernel.org/stable/c/ae6c8b6e5d5628df1c475c0a8fca1465e205c95b patch
https://git.kernel.org/stable/c/a89ff5f5cc64b9fe7a992cf56988fd36f56ca82a patch

Frequently Asked Questions

What is the severity of CVE-2022-49010?
CVE-2022-49010 has been scored as a medium severity vulnerability.
How to fix CVE-2022-49010?
To fix CVE-2022-49010, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49010 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-49010 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49010?
CVE-2022-49010 affects Linux Linux, Linux Linux.
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