High severity · published Apr 7, 2021
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…
7.8
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
Freebsd · Freebsd
12.0 before 12.2; 12.2; 12.2; 12.2; 13.0; 13.0; +5 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-29627
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-29627
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/
More from Freebsd
10.0
CVE-2024-43102
umtx Kernel panic or Use-After-Free
10.0
CVE-2018-17160
In FreeBSD before 11.2-STABLE(r341486) and 11.2-RELEASE-p6, insufficient bounds checking in one of the device models provided by bhyve can permit a guest operating system to…
9.8
CVE-2026-101306
Multiple jail filesystem root escapes
9.8
CVE-2026-58082
Stack based buffer overflow in iconv(3)
9.8
CVE-2026-58081
Heap based buffer overflow in iconv(3)