In FreeBSD 12.1-STABLE before r364644, 11.4-STABLE before r364651, 12.1-RELEASE before p9, 11.4-RELEASE before p3, and 11.3-RELEASE before p13, improper handling in the kernel causes a use-after-free bug by sending large user messages from multiple threads on the same SCTP socket. The use-after-free situation may result in unintended kernel behaviour including a kernel panic.
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:25.sctp.asc
https://support.apple.com/kb/HT212325
https://support.apple.com/kb/HT212321
https://support.apple.com/kb/HT212317
https://support.apple.com/kb/HT212318
https://support.apple.com/kb/HT212319
http://seclists.org/fulldisclosure/2021/Apr/50
http://seclists.org/fulldisclosure/2021/Apr/49
http://seclists.org/fulldisclosure/2021/Apr/57
http://seclists.org/fulldisclosure/2021/Apr/58
http://seclists.org/fulldisclosure/2021/Apr/59
Source: MITRE
Published: 2021-03-26
Updated: 2022-04-22
Type: CWE-416
Base Score: 4.9
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 3.9
Severity: MEDIUM
Base Score: 5.5
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 1.8
Severity: MEDIUM