CVE-2017-18344

N/A
Published: July 26, 2018 at 07:00 PM UTC
Updated: June 17, 2026 at 01:12 AM UTC
9 products affected across 3 vendorsLinux KernelUbuntu LinuxEnterprise Linux Desktop

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Severity
N/A
Exploit prediction
EPSS 3%

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).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

References (15)

VDB Entryx_refsource_BIDThird Party Advisory
http://www.securityfocus.com/bid/104909
VDB Entryx_refsource_SECTRACKThird Party Advisory
http://www.securitytracker.com/id/1041414
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2948
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:3083
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:3096
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:3459
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:3540
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:3586

CVSS

Confidentiality
PARTIAL
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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