vulnerability

Oracle Linux: CVE-2017-18344: ELSA-2018-4211: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:C/I:N/A:N)
Published
Dec 15, 2017
Added
Aug 15, 2018
Modified
Jan 24, 2025

Description

The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).
The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function.

Solution(s)

oracle-linux-upgrade-kerneloracle-linux-upgrade-kernel-uek
Title
NEW

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