What is CVE-2021-29627?

CVE-2021-29627 is a high-severity vulnerability in Freebsd, classified under Double Free. CVSS score: 7.8/10. Published 2021-04-07.

How severe is CVE-2021-29627?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2021-29627 known to be exploited?

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

Double Free in Freebsd

CVE-2021-29627

In FreeBSD 13.0-STABLE before n245050, 12.2-STABLE before r369525, 13.0-RC4 before p0, and 12.2-RELEASE before p6, listening socket accept filters implementing the accf_create callback incorrectly freed a process supplied argument string. Additional operations on the socket can lead to a double free or use after free.

Vulnerability class: Double Free

EPSS: 0.007 (51.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Freebsd — versions 12.2, 13.0
N/a Freebsd — versions FreeBSD 12.2-RELEASE before p6

Weakness classification (CWE)

Public proof-of-concept exploits

References

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

Frequently asked questions

What is CVE-2021-29627?: CVE-2021-29627 is a high-severity vulnerability in Freebsd, classified under Double Free. CVSS score: 7.8/10. Published 2021-04-07.
How severe is CVE-2021-29627?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2021-29627 known to be exploited?: 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.