Vulnerabilities > CVE-2021-46979 - Double Free vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
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.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817da
- https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817da
- https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1a
- https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1a
- https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303
- https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303