Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.11, < 5.11.22 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817daPatch
- https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1aPatch
- https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303Patch
- https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817daPatch
- https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1aPatch
- https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303Patch
FAQ
What is CVE-2021-46979?
CVE-2021-46979 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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(...
How severe is CVE-2021-46979?
CVE-2021-46979 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-46979?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.