cve-2021-47461
Vulnerability from cvelistv5
Published
2024-05-22 06:23
Modified
2024-12-19 07:42
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/149958ecd0627a9f1e9c678c25c665400054cd6a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3cda4bfffd4f755645577aaa9e96a606657b4525
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cb185d5f1ebf900f4ae3bf84cee212e6dd035aca
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/149958ecd0627a9f1e9c678c25c665400054cd6a
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3cda4bfffd4f755645577aaa9e96a606657b4525
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cb185d5f1ebf900f4ae3bf84cee212e6dd035aca
Impacted products
Vendor Product Version
Linux Linux Version: 5.7
Show details on NVD website

To clipboard 

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