CVE-2021-43411
CVSS v3
7.5
HIGH
EPSS Score
1.3 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An issue was discovered in GNU Hurd before 0.9 20210404-9. When trying to exec a setuid executable, there's a window of time when the process already has the new privileges, but still refers to the old task and is accessible through the old process port. This can be exploited to get full root access.
Technical details
- Published
- 2021-11-07
Frequently asked questions
What is CVE-2021-43411?
An issue was discovered in GNU Hurd before 0.9 20210404-9. When trying to exec a setuid executable, there's a window of time when the process already has the new privileges, but still refers to the old task and is accessible through the old process port. This can be exploited to get full root access.
Is CVE-2021-43411 actively exploited?
Active exploitation of CVE-2021-43411 has not been confirmed. Its EPSS score was 1.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-43411?
CVE-2021-43411 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-43411 affecting your environment?
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