CVE-2021-42075
CVSS v3
7.5
HIGH
EPSS Score
2.2 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An issue was discovered in Barrier before 2.3.4. The barriers component (aka the server-side implementation of Barrier) does not correctly close file descriptors for established TCP connections. An unauthenticated remote attacker can thus cause file descriptor exhaustion in the server process, leading to denial of service.
Technical details
- Published
- 2021-11-08
Frequently asked questions
What is CVE-2021-42075?
An issue was discovered in Barrier before 2.3.4. The barriers component (aka the server-side implementation of Barrier) does not correctly close file descriptors for established TCP connections. An unauthenticated remote attacker can thus cause file descriptor exhaustion in the server process, leading to denial of service.
Is CVE-2021-42075 actively exploited?
Active exploitation of CVE-2021-42075 has not been confirmed. Its EPSS score was 2.2% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-42075?
CVE-2021-42075 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-42075 affecting your environment?
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