CVE-2021-29628

Name: CVE-2021-29628
Creator: NVD / NIST
Published: 2021-05-28T15:15:08.627+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.25%

Last modified Jun 17, 2026

CVE-2021-29628 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In FreeBSD 13.0-STABLE before n245764-876ffe28796c, 12.2-STABLE before r369857, 13.0-RELEASE before p1, and 12.2-RELEASE before p7, a system call triggering a fault could cause SMAP protections to be disabled for the duration of the system call. This weakness could be combined with other kernel bugs to craft an exploit.. EPSS estimates a 1.25% chance of exploitation in the next 30 days.

Description

In FreeBSD 13.0-STABLE before n245764-876ffe28796c, 12.2-STABLE before r369857, 13.0-RELEASE before p1, and 12.2-RELEASE before p7, a system call triggering a fault could cause SMAP protections to be disabled for the duration of the system call. This weakness could be combined with other kernel bugs to craft an exploit.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.25%

65.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Freebsd	Freebsd	12.2
Freebsd	Freebsd	13.0

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-21:11.smap.ascExploit, Vendor Advisory
https://security.netapp.com/advisory/ntap-20210713-0002/Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:11.smap.ascExploit, Vendor Advisory
https://security.netapp.com/advisory/ntap-20210713-0002/Third Party Advisory

Timeline

Published: May 28, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29628?

How severe is CVE-2021-29628?

CVE-2021-29628 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.25% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29628?

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-2021-29628?

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

Scan your code now

Source: NVD / NIST