CVE Database›CVE-2016-5195

CVE-2016-5195

kernel: mm: privilege escalation via MAP_PRIVATE COW breakage

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Severity

Important

Red Hat Product Security

7.8

CVSS 3.0

Review impact separately from score.

Published · October 19, 2016

Updated · June 28, 2026

Description

A race condition was found in the way the Linux kernel's memory subsystem handled the copy-on-write (COW) breakage of private read-only memory mappings. An unprivileged, local user could use this flaw to gain write access to otherwise read-only memory mappings and thus increase their privileges on the system.

Statement

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG 2.x. This issue has been rated as having Important security impact.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Please see bug 1384344 comment #13 (https://bugzilla.redhat.com/show_bug.cgi?id=1384344#c13) for details on how to mitigate this issue.

CVSS / CWE

CVSS 3.0 · 7.8
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0 · 6.9
AV:L/AC:M/Au:N/C:C/I:C/A:C

CWE not specified