USN-8924-1: Linux kernel vulnerabilities
Ubuntu patches old Linux kernel flaws that leak PIDs or crash via malicious XFS and f2fs images.
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The time subsystem in the Linux kernel through 4.9.9, when CONFIG_TIMER_STATS is enabled, allows local users to discover real PID values (as distinguished from PID values inside a PID namespace) by reading the /proc/timer_list file, related to the print_timer function in kernel/time/timer_list.c and the __timer_stats_timer_set_start_info function in kernel/time/timer.c.
Ubuntu patches old Linux kernel flaws that leak PIDs or crash via malicious XFS and f2fs images.
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