CVE - CVE-2021-47461

CVE-ID
CVE-2021-47461	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/149958ecd0627a9f1e9c678c25c665400054cd6a URL:https://git.kernel.org/stable/c/149958ecd0627a9f1e9c678c25c665400054cd6a MISC:https://git.kernel.org/stable/c/3cda4bfffd4f755645577aaa9e96a606657b4525 URL:https://git.kernel.org/stable/c/3cda4bfffd4f755645577aaa9e96a606657b4525 MISC:https://git.kernel.org/stable/c/cb185d5f1ebf900f4ae3bf84cee212e6dd035aca URL:https://git.kernel.org/stable/c/cb185d5f1ebf900f4ae3bf84cee212e6dd035aca
Assigning CNA
kernel.org
Date Record Created
20240522	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240522)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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