peter bassill · operator
$ cve CVE-2017-18344 JSON

CVE-2017-18344 EXPLOIT

5.5
MEDIUM · CVSS 3.0 · EPSS 3.4% (pctl 89)

Patch early

A public exploit exists.

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).

Scoring

CVSS5.5 (MEDIUM, v3.0)
VectorCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS3.44% — more likely to be exploited than 89% of all CVEs
WeaknessCWE-125
On CISA KEVno
Public exploityes
Published2018-07-26
Last modified2026-06-17

Affected (9)

VendorProduct
canonicalubuntu linux
linuxlinux kernel
redhatenterprise linux desktop
redhatenterprise linux server
redhatenterprise linux server aus
redhatenterprise linux server eus
redhatenterprise linux server tus
redhatenterprise linux workstation
redhatmrg realtime

Public exploits

SourceTitleDate
exploit-dbLinux Kernel 4.14.7 (Ubuntu 16.04 / CentOS 7) - (KASLR & SMEP Bypass) Arbitrary File Read2018-08-09

References

→ the Explorer  ·  watch your stack  ·  NVD