K01512680 : Linux kernel vulnerability CVE-2019-11811

Security Advisory Description

An issue was discovered in the Linux kernel before 5.0.4. There is a use-after-free upon attempted read access to /proc/ioports after the ipmi_si module is removed, related to drivers/char/ipmi/ipmi_si_intf.c, drivers/char/ipmi/ipmi_si_mem_io.c, and drivers/char/ipmi/ipmi_si_port_io.c. (CVE-2019-11811)

Impact

An attacker, with local access to read /proc/ioports, may be able to create a use-after-free condition when the kernel module is unloaded, which may result in privilege escalation.