CVE-2021-29627

moderate-risk
Published 2021-04-07

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.

Do I need to act?

~
1.1% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (11)

Affected Vendors

Freebsd

References (4)

Vendor Advisory https://security.FreeBSD.org/advisories/FreeBSD-SA-21:09.accept_filter.asc
Third Party Advisory https://security.netapp.com/advisory/ntap-20210423-0007/
Vendor Advisory https://security.FreeBSD.org/advisories/FreeBSD-SA-21:09.accept_filter.asc
Third Party Advisory https://security.netapp.com/advisory/ntap-20210423-0007/
43
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 3/34 · Minimal
Exposure 16/34 · Moderate