What is CVE-2020-25581?

CVE-2020-25581 is a high-severity vulnerability in FreeBSD, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.5/10. Published 2021-03-26.

How severe is CVE-2020-25581?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in FreeBSD

CVE-2020-25581

In FreeBSD 12.2-STABLE before r369312, 11.4-STABLE before r369313, 12.2-RELEASE before p4 and 11.4-RELEASE before p8 due to a race condition in the jail_remove(2) implementation, it may fail to kill some of the processes.

Vulnerability class: Race Condition

Published 2021-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

FreeBSD — versions 11.4, 12.2
FreeBSD — versions FreeBSD 12.2-RELEASE before p4, 11.4-RELEASE before p8

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

security.FreeBSD.org/advisories/FreeBSD-SA-21:04.jail_remove.asc (Vendor Advisory)
security.netapp.com/advisory/ntap-20210423-0006/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-25581?: CVE-2020-25581 is a high-severity vulnerability in FreeBSD, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.5/10. Published 2021-03-26.
How severe is CVE-2020-25581?: High severity. CVSS v3 base score is 7.5 out of 10.