CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 4.7. It affects Linux.
CVE
CVE-2021-47461
Severity
MEDIUM
CVSS
4.7
EPSS
0.16%
Linux
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: userfaultfd: fix a race between writeprotect and exit_mmap() A race is possible when a process exits, its VMAs are removed by exit_mmap() and at the same time userfaultfd_writeprotect() is called. The race was detected by KASAN on a development kernel, but it appears to be possible on vanilla kernels as well. Use mmget_not_zero() to prevent the race as done in other userfaultfd operations.
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