CVE-2017-18344
MEDIUM 5.5EPSS 3.4%
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 NVD
- 5.5 MEDIUM
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS v2.0 NVD
- 2.1 LOW
AV:L/AC:L/Au:N/C:P/I:N/A:N - EPSS
- 3.44% chance of exploitation in the next 30 days, 89th 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)
Security advisories
- http://www.securityfocus.com/bid/104909
- http://www.securitytracker.com/id/1041414
- https://access.redhat.com/errata/RHSA-2018:2948
- https://access.redhat.com/errata/RHSA-2018:3083
- https://access.redhat.com/errata/RHSA-2018:3096
- https://access.redhat.com/errata/RHSA-2018:3459
- https://access.redhat.com/errata/RHSA-2018:3540
- https://access.redhat.com/errata/RHSA-2018:3586
- https://access.redhat.com/errata/RHSA-2018:3590
- https://access.redhat.com/errata/RHSA-2018:3591
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8
- torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe
- https://usn.ubuntu.com/3742-1
- https://usn.ubuntu.com/3742-2