CVE-2021-47461 addresses a race condition in the Linux kernel's userfaultfd mechanism, specifically between writeprotect operations and the exit_mmap() function during process termination. This vulnerability, affecting Linux kernel versions, could lead to a denial of service (A:H) due to the race condition. Rated as Medium severity (CVSS 4.7), it requires low privileges (PR:L) and high attack complexity (AC:H), with no direct impact on confidentiality or integrity. There is no evidence of active exploitation, public exploit code, or significant community discussion, suggesting a low immediate threat.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 5.7, < 5.10.76CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 5.11, < 5.14.15CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
5.15CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* | ||
5.15CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* | ||
5.15CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.