CVE-2017-5669

Name: CVE-2017-5669
Creator: NVD / NIST
Published: 2017-02-24T15:59:00.15+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2017-5669 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.40%

31.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 4.11
Debian	Debian Linux	8.0
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	14.04

References

http://www.debian.org/security/2017/dsa-3804Third Party Advisory
http://www.securityfocus.com/bid/96754Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037918Third Party Advisory, VDB Entry
https://bugzilla.kernel.org/show_bug.cgi?id=192931Issue Tracking, Patch, Vendor Advisory
https://github.com/torvalds/linux/commit/95e91b831f87ac8e1f8ed50c14d709089b4e01b8Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/e1d35d4dc7f089e6c9c080d556feedf9c706f0c7Patch, Third Party Advisory
https://usn.ubuntu.com/3583-1/Third Party Advisory
https://usn.ubuntu.com/3583-2/Third Party Advisory
http://www.debian.org/security/2017/dsa-3804Third Party Advisory
http://www.securityfocus.com/bid/96754Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037918Third Party Advisory, VDB Entry
https://bugzilla.kernel.org/show_bug.cgi?id=192931Issue Tracking, Patch, Vendor Advisory
https://github.com/torvalds/linux/commit/95e91b831f87ac8e1f8ed50c14d709089b4e01b8Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/e1d35d4dc7f089e6c9c080d556feedf9c706f0c7Patch, Third Party Advisory
https://usn.ubuntu.com/3583-1/Third Party Advisory
https://usn.ubuntu.com/3583-2/Third Party Advisory

Timeline

Published: Feb 24, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-5669?

How severe is CVE-2017-5669?

CVE-2017-5669 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2017-5669?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-5669?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST