What is CVE-2017-5669?

CVE-2017-5669 is a high-severity vulnerability in Linux Kernel. CVSS score: 7.8/10. Published 2017-02-24.

How severe is CVE-2017-5669?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2017-5669 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux Kernel

CVE-2017-5669

The do_shmat function in ipc/shm.c in the Linux kernel through 4.9.12 does not restrict the address calculated by a certain rounding operation, which allows local users to map page zero, and consequently bypass a protection mechanism that exists for the mmap system call, by making crafted shmget and shmat system calls in a privileged context.

Published 2017-02-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (33.1th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Linux Kernel
Canonical Ubuntu Linux — versions 12.04, 14.04
Debian Linux — versions 8.0

Public proof-of-concept exploits

References

usn.ubuntu.com/3583-2/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3583-1/ (vendor-advisory, Third Party Advisory)
www.securitytracker.com/id/1037918 (VDB Entry, Third Party Advisory, vdb-entry)
www.securityfocus.com/bid/96754 (VDB Entry, Third Party Advisory, vdb-entry)
www.debian.org/security/2017/dsa-3804 (vendor-advisory, Third Party Advisory)
bugzilla.kernel.org/show_bug.cgi (Patch, Issue Tracking, Vendor Advisory)
github.com/torvalds/linux/commit/95e91b831f87ac8e1f8ed50c14d709089b4e01b8 (Patch, Third Party Advisory)
github.com/torvalds/linux/commit/e1d35d4dc7f089e6c9c080d556feedf9c706f0c7 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2017-5669?: CVE-2017-5669 is a high-severity vulnerability in Linux Kernel. CVSS score: 7.8/10. Published 2017-02-24.
How severe is CVE-2017-5669?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2017-5669 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.