CVE-2021-42075

7.5 highEPSS 2.2%

High (7.5) in barrier project barrier. EPSS 2.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 2.2% chance of exploitation in the next 30 days; higher than 82% of CVEs (scores of 2026-10-31)
CWE: CWE-772
Published: 2021-11-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

barrier_project:barrier

References

http://www.openwall.com/lists/oss-security/2021/11/02/4
https://github.com/debauchee/barrier/releases/tag/v2.3.4
http://www.openwall.com/lists/oss-security/2021/11/02/4
https://github.com/debauchee/barrier/releases/tag/v2.3.4

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