CVE Intelligence
CISA KEV High Logic error exploit reference

CVE-2016-5195 — Linux Kernel Race Condition Vulnerability

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."

Published Nov 10, 2016 · Updated Oct 13, 2026 · Sources: CISA Known Exploited Vulnerabilities, NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Chrome

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

CISA KEV · Mar 3, 2022 Exploit-DB · 5
How the score was calculated
  • Confirmed exploitation (CISA KEV)+35
  • Public exploit/PoC (exploitdb)+8
  • EPSS 83.5% (30-day exploitation probability)+15
  • Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Confirmed
CISA KEV, listed Mar 3, 2022
EPSS FIRST
83.52%
ahead of 100% of scored CVEs · Oct 14, 2026
Affects
Canonical
Ubuntu Linux and 17 more
CVSS base
7.0
High · 4 source(s)
Prioritization reference: 7.8 provisional

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
Active
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

  • Documented patch — git.kernel.org (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — github.com (NIST National Vulnerability Database)

CISA required action CISA

Apply updates per vendor instructions.

US federal deadline: Mar 24, 2022 — passed 1666 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora…).
  2. Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
  3. Apply the fixed version or the patch documented under Remediation.
  4. EPSS ahead of 100% of scored CVEs: prioritize it in the patch queue.
  5. Search available logs for exploit probes matching the vulnerability class (logic error), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Canonical Ubuntu Linux version 16.10version 16.04version 14.04version 12.04 Vulnerable NIST National Vulnerability Database
Debian Debian Linux version 8.0version 7.0 Vulnerable NIST National Vulnerability Database
Fedoraproject Fedora version 23version 24version 25 Vulnerable NIST National Vulnerability Database
Linux Linux Kernel ≥ 2.6.22 and < 3.2.83≥ 4.5 and < 4.7.9≥ 4.2 and < 4.4.26≥ 3.19 and < 4.1.35≥ 3.3 and < 3.4.113≥ 3.5 and < 3.10.104≥ 3.11 and < 3.12.66≥ 3.13 and < 3.16.38
and 2 more ≥ 3.17 and < 3.18.44≥ 4.8 and < 4.8.3
Vulnerable NIST National Vulnerability Database
Netapp Cloud Backup versions not specified by the source Vulnerable NIST National Vulnerability Database
Netapp Hci Storage Nodes versions not specified by the source Vulnerable NIST National Vulnerability Database
Netapp Oncommand Balance versions not specified by the source Vulnerable NIST National Vulnerability Database
Netapp Oncommand Performance Manager versions not specified by the source Vulnerable NIST National Vulnerability Database
Netapp Oncommand Unified Manager For Clustered Data Ontap versions not specified by the source Vulnerable NIST National Vulnerability Database
Netapp Ontap Select Deploy Administration Utility versions not specified by the source Vulnerable NIST National Vulnerability Database
Netapp Snapprotect versions not specified by the source Vulnerable NIST National Vulnerability Database
Netapp Solidfire versions not specified by the source Vulnerable NIST National Vulnerability Database
Palo Alto Networks PAN-OS ≥ 7.1.0 and < 7.1.8≥ 5.1 and < 7.0.14 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux version 7.0version 6.0version 5 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Aus version 6.5version 6.4version 6.2 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Eus version 7.1version 6.7version 6.6 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Long Life version 5.6version 5.9 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Tus version 6.5 Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
7.0 CVSS 3.1 High 1.0 5.9 nvd@nist.gov via NIST National Vulnerability Database
7.0 CVSS 3.1 High 1.0 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0 via NIST National Vulnerability Database
7.0 CVSS 3.1 High — — CISA-ADP via CVE Program (cve.org) e CISA ADP
7.8 CVSS 3.0 High — — GitHub, Inc. via GitHub Security Advisories
7.2 CVSS 2.0 High 3.9 10.0 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)
Sources assign different scores within the same severity band. For prioritization we use 7.8 (GitHub, Inc. via GitHub Security Advisories) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-362 · Race Condition

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

Listed
Mar 3, 2022
Federal deadline
Mar 24, 2022
passed 1666 day(s) ago
Ransomware use
Unknown

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

Public exploits, PoCs and detection templates

Public code that demonstrates or tests the flaw raises the odds of mass exploitation — and Nuclei templates help find vulnerable assets in your environment.

Exploit-DB

Warning: public PoCs are sometimes disguised malware. Use them only for authorized testing in an isolated environment. This portal does not host exploit code — it only points to the sources.

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 83.52%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
  • Hunt retroactively in logs from before Mar 3, 2022 (KEV listing): exploitation may have started earlier.
endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

  • 2026
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • Fix documented
    Oct 13, 2026 · NIST National Vulnerability Database
  • Affected products added · canonical/ubuntu linux, linux/linux kernel, redhat/enterprise linux, redhat/enterprise linux aus, redhat/enterprise linu
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVSS changed · 7.0
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Analyzed
    Oct 13, 2026 · NIST National Vulnerability Database
  • Added to CISA KEV (detected)
    Oct 13, 2026 · CISA Known Exploited Vulnerabilities
  • Record created in this database
    Oct 13, 2026 · CISA Known Exploited Vulnerabilities
  • 2022
  • Added to CISA KEV catalog
    Mar 2, 2022 · CISA
  • 2016
  • CVE published
    Nov 10, 2016 · Chrome

Source activity

Repeated readings are counted rather than listed.

  • 2× References added · Oct 13, 2026 – Oct 13, 2026
  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

100 on the record

Elsewhere on this site

Canonical
every CVE for this vendor
2022-03
what else CISA listed that month
Logic error
same class
CWE-362
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-0320 PAN-OS: Authenticated Admin Command Injection Vulnerability 21h
  • CVE-2026-0318 PAN-OS: Denial of Service (DoS) on Panorama 21h
  • CVE-2026-0319 PAN-OS: Improper Input Handling Vulnerability 21h
  • CVE-2026-0316 PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability 21h
  • CVE-2026-0317 PAN-OS: Denial of Service Vulnerability 21h
  • CVE-2026-0321 PAN-OS: Denial of Service (DoS) Vulnerabilities in Network Services 22h

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2016-5195 is "Linux Kernel Race Condition Vulnerability", rated High. It affects Ubuntu Linux (Canonical); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 7.0 describes technical severity. EPSS 83.52% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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