CVE-2021-29628

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-05-28 · updated 2026-06-17
Weakness: CWE-863

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.

Affected products

FreeBSD: 12.2, 12.2-beta1-p1, 12.2-p1, 12.2-p2, 12.2-p3, 12.2-p4 (+7)

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-21:11.smap.asc
https://security.netapp.com/advisory/ntap-20210713-0002/
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:11.smap.asc
https://security.netapp.com/advisory/ntap-20210713-0002/

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