PT-2024-11455 · Linux+6 · Linux Kernel+6
Nadav Amit
·
Published
2021-10-18
·
Updated
2025-09-24
·
CVE-2021-47461
CVSS v2.0
6.0
Medium
| Vector | AV:L/AC:H/Au:S/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A race condition is possible in the Linux kernel when a process exits and its VMAs are removed by
exit mmap() at the same time userfaultfd writeprotect() is called. This issue was detected by KASAN on a development kernel and appears to be possible on vanilla kernels as well. The race can be prevented by using mmget not zero() as done in other userfaultfd operations.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Race Condition
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Weakness Enumeration
Related Identifiers
Affected Products
Almalinux
Astra Linux
Centos
Linux Kernel
Red Hat
Rocky Linux
Suse