What is CVE-2021-29628?

CVE-2021-29628 is a high-severity vulnerability in Freebsd, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2021-05-28.

How severe is CVE-2021-29628?

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

Is CVE-2021-29628 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Freebsd

CVE-2021-29628

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.

Vulnerability class: Broken Access Control

EPSS: 0.012 (66.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Freebsd — versions 12.2, 13.0
N/a Freebsd — versions FreeBSD 13.0-RELEASE before p1, 12.2-RELEASE before p7

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

Public proof-of-concept exploits

r3dg0d/pspwn5

References

secteam@freebsd.org (Exploit, x_refsource_MISC, Vendor Advisory)
secteam@freebsd.org (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2021-29628?: CVE-2021-29628 is a high-severity vulnerability in Freebsd, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2021-05-28.
How severe is CVE-2021-29628?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-29628 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.