A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may allow a read-after-free attack against TIOCGSID, aka CID-c8bcd9c5be24.
4.4.0-203.2354.4.0-1122.1364.15.0-1094.101~16.04.14.15.0-1108.120~16.04.14.15.0-1093.106~16.04.14.15.0-136.140~16.04.14.10.0-14.16~16.04.14.10.0-19.21~16.04.14.10.0-20.22~16.04.14.10.0-21.23~16.04.14.10.0-22.24~16.04.14.10.0-24.28~16.04.14.10.0-26.30~16.04.14.11.0-13.19~16.04.14.11.0-14.20~16.04.14.13.0-16.19~16.04.3+13 more4.4.0-1088.974.15.0-1065.73~16.04.14.4.0-1146.156Exploitability
AV:LAC:LPR:HUI:NScope
S:UImpact
C:HI:NA:NCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N