摘要:
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.
安全等级: Low
公告ID: KylinSec-SA-2024-2802
发布日期: 2024年6月19日
关联CVE: CVE-2021-47461
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.
| cve名称 | 产品 | 组件 | 是否受影响 |
|---|---|---|---|
| CVE-2021-47461 | KY3.4-5A | kernel | Unaffected |
| CVE-2021-47461 | KY3.5.2 | kernel | Unaffected |
| CVE-2021-47461 | V6 | kernel | Unaffected |
