CVE-2021-46905

In the Linux kernel, the following vulnerability has been resolved: net: hso: fix NULL-deref on disconnect regression Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device unregistration") fixed the racy minor allocation reported by syzbot, but introduced an unconditional NULL-pointer dereference on every disconnect instead. Specifically, the serial device table must no longer be accessed after the minor has been released by hso_serial_tty_unregister().

• linux linux kernel (< 4.19.189) • linux linux kernel (>= 4.20.0 < 5.4.115) • linux linux kernel (>= 5.5.0 < 5.10.33) • linux linux kernel (>= 5.11.0 < 5.11.17) • linux linux kernel 5.12