Vulnerability DatabaseCVE-2017-5669
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CVE-2017-5669
Published:February 24, 2017
Updated:May 17, 2026
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.
Related Resources (10)
https://github.com/torvalds/linux/commit/95e91b831f87ac8e1f8ed50c14d709089b4e01b8
https://security-tracker.debian.org/tracker/CVE-2017-5669
http://www.securitytracker.com/id/1037918
http://www.securityfocus.com/bid/96754
https://usn.ubuntu.com/3583-2/
https://usn.ubuntu.com/3583-1/
https://bugzilla.kernel.org/show_bug.cgi?id=192931
https://people.canonical.com/~ubuntu-security/cve/CVE-2017-5669
http://www.debian.org/security/2017/dsa-3804
https://github.com/torvalds/linux/commit/e1d35d4dc7f089e6c9c080d556feedf9c706f0c7
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CVSS v4
Base Score:
8.5
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.8
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
EPSS
Base Score:
0.06