vulnerability
Debian: CVE-2021-47461: linux -- security update
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:L/AC:M/Au:S/C:C/I:N/A:C) | 05/22/2024 | 07/30/2024 | 02/19/2025 |
Severity
6
CVSS
(AV:L/AC:M/Au:S/C:C/I:N/A:C)
Published
05/22/2024
Added
07/30/2024
Modified
02/19/2025
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.
Solution
debian-upgrade-linux
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