Products
Linux kernel
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Tags
CVE-2021-47461 details
Published : May 22, 2024, 7:15 a.m.
Last Modified : May 22, 2024, 12:46 p.m.
Last Modified : May 22, 2024, 12:46 p.m.
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.
CVSS Score
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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Weakness
| Weakness | Name | Description |
|---|
References
| URL | Source |
|---|---|
| https://git.kernel.org/stable/c/149958ecd0627a9f1e9c678c25c665400054cd6a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
| https://git.kernel.org/stable/c/3cda4bfffd4f755645577aaa9e96a606657b4525 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
| https://git.kernel.org/stable/c/cb185d5f1ebf900f4ae3bf84cee212e6dd035aca | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
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