CWE Code: 416
Vulnerability Type: privilege_escalation
CVSS Score: 7.2
CWE Name:  Use After Free
Summary: in the linux kernel, a certain net/ipv4/tcp_output.c change, which was properly incorporated into 4.16.12, was incorrectly backported to the earlier longterm kernels, introducing a new vulnerability that was potentially more severe than the issue that was intended to be fixed by backporting. specifically, by adding to a write queue between disconnection and re-connection, a local attacker can trigger multiple use-after-free conditions. this can result in a kernel crash, or potentially in privilege escalation. note: this affects (for example) linux distributions that use 4.9.x longterm kernels before 4.9.190 or 4.14.x longterm kernels before 4.14.139.
Access Authentication: NONE
Access Complexity: LOW
Access Vector: LOCAL
Impact (C/I/A): COMPLETE/COMPLETE/COMPLETE
Published Date: 2019-08-20
Last Modified Date: 2019-09-24