CVE-2020-25579

Name: CVE-2020-25579
Creator: NVD / NIST
Published: 2021-03-26T21:15:12.74+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.12%

Last modified Jun 17, 2026

CVE-2020-25579 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. In FreeBSD 12.2-STABLE before r368969, 11.4-STABLE before r369047, 12.2-RELEASE before p3, 12.1-RELEASE before p13 and 11.4-RELEASE before p7 msdosfs(5) was failing to zero-fill a pair of padding fields in the dirent structure, resulting in a leak of three uninitialized bytes.. EPSS estimates a 1.12% chance of exploitation in the next 30 days.

Description

In FreeBSD 12.2-STABLE before r368969, 11.4-STABLE before r369047, 12.2-RELEASE before p3, 12.1-RELEASE before p13 and 11.4-RELEASE before p7 msdosfs(5) was failing to zero-fill a pair of padding fields in the dirent structure, resulting in a leak of three uninitialized bytes.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.12%

61.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-909

Affected Software

Vendor	Product	Versions
Freebsd	Freebsd	11.4
Freebsd	Freebsd	12.1
Freebsd	Freebsd	12.2

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-21:01.fsdisclosure.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20210423-0002/Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:01.fsdisclosure.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20210423-0002/Third Party Advisory

Timeline

Published: Mar 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25579?

How severe is CVE-2020-25579?

CVE-2020-25579 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.12% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25579?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-25579?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST