CVE-2017-18344
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...
- Published
- Jul 26, 2018
- Updated
- Aug 5, 2024
- Assigning CNA
- mitre
- Evidence observed
- Aug 9, 2018
Primary CVSS
nvd · CVSS 3.0
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NLow · next 30 days
- Percentile
- 87.2%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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).
Sources
4- exploit_linux_kernel4.13Exploit
LPE on linux kernel based on CVE-2017-14954, CVE-2017-18344, CVE-2017-5123
- kernel-exploitsExploit
My proof-of-concept exploits for the Linux kernel
- docker_escape_pwnExploit
Escape from Docker using CVE-2017-1000112 and CVE-2017-18344, including gaining root privilage, get all capbilities, namespace recovery, filesystem recovery, cgroup limitation bypass and seccomp bypass.
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