CVE-2021-46979

iio: core: fix ioctl handlers removal

Description

In the Linux kernel, the following vulnerability has been resolved: iio: core: fix ioctl handlers removal Currently ioctl handlers are removed twice. For the first time during iio_device_unregister() then later on inside iio_device_unregister_eventset() and iio_buffers_free_sysfs_and_mask(). Double free leads to kernel panic. Fix this by not touching ioctl handlers list directly but rather letting code responsible for registration call the matching cleanup routine itself.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.05%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817da patch
https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303 patch
https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1a patch

Frequently Asked Questions

What is the severity of CVE-2021-46979?
CVE-2021-46979 has been scored as a medium severity vulnerability.
How to fix CVE-2021-46979?
To fix CVE-2021-46979, 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-2021-46979 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-46979 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-2021-46979?
CVE-2021-46979 affects Linux Linux, Linux Linux.
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