CVE-2021-47461

Source

https://nvd.nist.gov/vuln/detail/CVE-2021-47461

Import Source

JSON Data

https://api.osv.dev/v1/vulns/CVE-2021-47461

Related

Published

2024-05-22T07:15:11Z

Modified

2024-09-18T03:17:28.519201Z

Summary

[none]

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 exitmmap() and at the same time userfaultfdwriteprotect() is called.

The race was detected by KASAN on a development kernel, but it appears to be possible on vanilla kernels as well.

Use mmgetnotzero() to prevent the race as done in other userfaultfd operations.

References

Affected packages

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.10.84-1

5.10.46-4

5.10.46-5

5.10.70-1~bpo10+1

5.10.70-1

{
    "urgency": "not yet assigned"
}

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.14.16-1

{
    "urgency": "not yet assigned"
}

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.14.16-1

{
    "urgency": "not yet assigned"
}