CWE Code: 416
Vulnerability Type: privilege_escalation
CVSS Score: 7.2
CWE Name:  Use After Free
Summary: in freebsd 12.0-stable before r349805, 12.0-release before 12.0-release-p8, 11.3-stable before r349806, 11.3-release before 11.3-release-p1, and 11.2-release before 11.2-release-p12, code which handles close of a descriptor created by posix_openpt fails to undo a signal configuration. this causes an incorrect signal to be raised leading to a write after free of kernel memory allowing a malicious user to gain root privileges or escape a jail.
Access Authentication: NONE
Access Complexity: LOW
Access Vector: LOCAL
Impact (C/I/A): COMPLETE/COMPLETE/COMPLETE
Published Date: 2019-07-26
Last Modified Date: 2019-08-14