What is CVE-2017-1000405?

CVE-2017-1000405 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10, classified as a Race Condition flaw (CWE-362). CVE-2017-1000405 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2017-1000405?

CVE-2017-1000405 has a CVSS score of 7.0 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2017-1000405?

No patch is currently available for CVE-2017-1000405. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2017-1000405 actively exploited?

CVE-2017-1000405 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2017-1000405

High

The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmd_mkdirty() in the touch_pmd() function inside the THP implementation. touch_pmd() can be reached by get_user_pages(). In such case, the pmd will become dirty. This scenario breaks the new can_follow_write_pmd()'s logic - pmd can become dirty without going through a COW cycle. This bug is not as severe as the original "Dirty cow" because an ext4 file (or any other regular file) cannot be mapped using THP. Nevertheless, it does allow us to overwrite read-only huge pages. For example, the zero huge page and sealed shmem files can be overwritten (since their mapping can be populated using THP). Note that after the first write page-fault to the zero page, it will be replaced with a new fresh (and zeroed) thp.

Package Linux Kernel

Published 2017-11-30

Last modified 2026-05-13

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.0

out of 10

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-362

CVE-2017-1000405 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2017-1000405 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Securityfocus
http://www.securityfocus.com/bid/102032

Third Party Advisory VDB Entry
Securitytracker
http://www.securitytracker.com/id/1040020

Third Party Advisory VDB Entry
Red Hat
https://access.redhat.com/errata/RHSA-2018:0180

Third Party Advisory
Medium
https://medium.com/bindecy/huge-dirty-cow-cve-2017-1000405-110eca132de0

Exploit Issue Tracking Third Party Advisory
Source
https://source.android.com/security/bulletin/pixel/2018-02-01

Third Party Advisory
Exploit-DB
https://www.exploit-db.com/exploits/43199/

Exploit Issue Tracking Third Party Advisory VDB Entry

Details

CVE ID CVE-2017-1000405

Severity High

CVSS score 7.0 / 10

CVSS version 3.1

Published 2017-11-30

Modified 2026-05-13

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2017-1000405?

CVE-2017-1000405 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 , classified as a Race Condition flaw (CWE-362) . CVE-2017-1000405 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2017-1000405?

CVE-2017-1000405 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2017-1000405?

No patch is currently available for CVE-2017-1000405. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2017-1000405 actively exploited?

No — CVE-2017-1000405 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. View CWE-362 on MITRE CWE →