CVE-2016-5195highunder attackCWE-362

CVE-2016-5195

Published 10 Nov 2016 · Updated 04 Nov 2025

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100Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 7epss 84%

from disclosure to weaponsame day

Published on NVDNov 10

1st PoCOct 19

CISA KEV+1939d

What the vendors declare (VEX)

Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.

Red HatVEX document ↗

Fixed

43 products (977 components)

Red Hat Enterprise Linux Server (v. 7) · Red Hat Enterprise Linux Server EUS (v. 7.1) · Red Hat Enterprise Linux (v. 5 server) · Red Hat Enterprise Linux Server (v. 6) · Red Hat Enterprise Linux Server EUS (v. 6.6) · and others 38

fix ↗

Not affected

1 product — because the vulnerable code is not present in the product

Red Hat Enterprise Linux 4

Action required by CISAfederal deadline: 2022-03-24

Apply updates per vendor instructions.

In short

A flaw in Linux allows someone on your computer to trick the system into writing to memory that should be read-only, letting them take control. This happened because the system didn't properly manage a copy-on-write feature that's supposed to protect memory.

Technical detail

Race condition in mm/gup.c affecting Linux kernel 2.x–4.x before 4.8.3 allows local privilege escalation by exploiting improper copy-on-write (COW) handling. An unprivileged user can write to read-only memory mappings by manipulating page references during concurrent access, leading to kernel-level code execution.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect handling of a copy-on-write (COW) feature to write to a read-only memory mapping, as exploited in the wild in October 2016, aka "Dirty COW."

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

Affected products

n/a · n/a

public PoCs found — 144✓ VexDay Proof

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

http://fortiguard.com/advisory/FG-IR-16-063 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=19be0eaffa3ac7d8eb6784ad9bdbc7d67ed8e619 http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10770 http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10774 http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10807 http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00034.html http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00035.html http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00036.html http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00038.html http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00039.html http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00040.html http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00045.html