Vulnerability · Published Apr 7, 2021 · Assigned by freebsd

CVE-2021-29627

High 7.8

In plain English

A high-severity security flaw in FreeBSD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS NVD)7.8High

Exploit odds (30 days)0.7%top 44.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack tooling1Public PoC

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
n/a	FreeBSD	FreeBSD 12.2-RELEASE before p6

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-21:09.accept_filter.asc x_refsource_MISC
https://security.netapp.com/advisory/ntap-20210423-0007/ x_refsource_CONFIRM