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.

INFO

Published Date :

2024-05-22T06:23:22.373Z

Last Modified :

2025-05-04T07:11:24.932Z

Source :

Linux
AFFECTED PRODUCTS

The following products are affected by CVE-2021-47461 vulnerability.

Vendors Products
Linux
  • Linux Kernel
Redhat
  • Enterprise Linux
  • Rhel Aus
  • Rhel E4s
  • Rhel Eus
  • Rhel Tus
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2021-47461.

URL Resource
https://git.kernel.org/stable/c/149958ecd0627a9f1e9c678c25c665400054cd6a cve-icon cve-icon
https://git.kernel.org/stable/c/3cda4bfffd4f755645577aaa9e96a606657b4525 cve-icon cve-icon
https://git.kernel.org/stable/c/cb185d5f1ebf900f4ae3bf84cee212e6dd035aca cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024052225-CVE-2021-47461-a472@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2021-47461 cve-icon
https://www.cve.org/CVERecord?id=CVE-2021-47461 cve-icon
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