Information exposure in Linux kernel - CVE-2017-5967

Detailed vulnerability description

The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.

The vulnerability exists due to information exposure error within the __queue_delayed_work() function in kernel/workqueue.c, within the copyright() function in kernel/time/timer_stats.c, within the print_timer() function in kernel/time/timer_list.c, within the internal_add_timer(), do_init_timer(), __mod_timer(), add_timer_on(), del_timer(), try_to_del_timer_sync(), expire_timers() and init_timer_cpus() functions in kernel/time/timer.c, within the hrtimers_resume(), remove_hrtimer(), hrtimer_start_range_ns(), __hrtimer_init() and __run_hrtimer() functions in kernel/time/hrtimer.c, within the __kthread_queue_delayed_work() function in kernel/kthread.c. A local non-authenticated attacker can gain access to sensitive information.

How to mitigate CVE-2017-5967

Sources

• http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=dfb4357da6ddbdf57d583ba64361c9d792b0e0b1
• http://www.securityfocus.com/bid/96271
• https://bugzilla.kernel.org/show_bug.cgi?id=193921