github - ghsa-q3gr-2743-cwm5

ghsa-q3gr-2743-cwm5

Vulnerability from github

Published

2024-05-22 09:31

Modified

2024-05-22 09:31

Details

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.

Show details on source website

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  "id": "GHSA-q3gr-2743-cwm5",
  "modified": "2024-05-22T09:31:45Z",
  "published": "2024-05-22T09:31:45Z",
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cve-2021-47461

Vulnerability from cvelistv5

Published

2024-05-22 06:23

Modified

2024-11-04 12:06

Severity ?

Summary

userfaultfd: fix a race between writeprotect and exit_mmap()

References

▼	URL	Tags
	https://git.kernel.org/stable/c/3cda4bfffd4f755645577aaa9e96a606657b4525
	https://git.kernel.org/stable/c/149958ecd0627a9f1e9c678c25c665400054cd6a
	https://git.kernel.org/stable/c/cb185d5f1ebf900f4ae3bf84cee212e6dd035aca

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

To clipboard

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