CVE-2021-47461
- Source
- https://cve.org/CVERecord?id=CVE-2021-47461
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47461.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-47461
- Downstream
- Related
- Published
- 2024-05-22T07:15:11Z
- Modified
- 2026-03-13T05:18:11Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- 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 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
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47461.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "5.7"
},
{
"fixed": "5.10.76"
}
]
},
{
"events": [
{
"introduced": "5.11"
},
{
"fixed": "5.14.15"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc1"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc2"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc3"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc4"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc5"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc6"
}
]
}
]