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 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).

CVSS v3.0

5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v2.0

2.1 LOWAV:L/AC:L/Au:N/C:P/I:N/A:N

EPSS

3.31% chance of exploitation in the next 30 days, 88th percentile

Published

2018-07-26

Updated

2024-08-05

Proof-of-concept exploits (1)

• echo-devim/exploit_linux_kernel4.131★ · 2022-03-11

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/45175

References

• CVE Record
• NVD entry

Related

• CVE-2017-14954
• CVE-2017-5123
• CVE-2022-48429
• CVE-2017-18343
• CVE-2017-18345
• CVE-2017-18342