CVE-2017-1000405

HIGHNVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 7.0Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
7.0
EG Score
7.0(medium)
EPSS
85.0%
KEV
Not listed

Published

November 30, 2017

Last Modified

May 13, 2026

References (12)

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-extra-3.13.0-137-generic (3.13.0-137.186) @ trusty2026-05-22ubuntu
ubuntulinux-image-extra-4.13.0-1002-gcp (4.13.0-1002.5) @ xenial2026-05-22ubuntu
ubuntulinux-image-extra-4.4.0-103-generic (4.4.0-103.126) @ xenial2026-05-22ubuntu
ubuntulinux-image-generic-lts-trusty (3.13.0.137.127) @ precise2026-05-22ubuntu
ubuntulinux-image-extra-4.11.0-1016-azure (4.11.0-1016.16) @ xenial2026-05-22ubuntu
ubuntulinux-image-raspi2 (4.13.0.1008.6) @ artful2026-05-22ubuntu
ubuntulinux-image-raspi2 (4.10.0.1023.24) @ zesty2026-05-22ubuntu
ubuntulinux-image-extra-4.10.0-42-generic (4.10.0-42.46~16.04.1) @ xenial2026-05-22ubuntu
ubuntulinux-image-extra-4.4.0-103-generic (4.4.0-103.126~14.04.1) @ trusty2026-05-22ubuntu
redhatkernel-alt-0:4.11.0-44.4.1.el7a2018-01-25redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(10)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 13:42 UTCEPSS rescore
  2. 2026-07-06 16:24 UTCEPSS rescore
  3. 2026-07-06 16:24 UTCEPSS rescore
  4. 2026-07-06 02:20 UTCEPSS rescore
  5. 2026-07-06 02:20 UTCEPSS rescore
  6. 2026-07-05 02:27 UTCEPSS rescore
  7. 2026-07-04 06:28 UTCEPSS rescore
  8. 2026-07-01 15:02 UTCEPSS rescore
  9. 2026-06-30 23:19 UTCEPSS rescore
  10. 2026-06-30 23:19 UTCEPSS rescore
  11. 2026-06-29 14:03 UTCEPSS rescore
  12. 2026-06-28 14:04 UTCEPSS rescore
  13. 2026-06-28 04:53 UTCEPSS rescore
  14. 2026-06-27 03:05 UTCEPSS rescore
  15. 2026-06-25 13:47 UTCEPSS rescore
  16. 2026-06-24 14:02 UTCEPSS rescore
  17. 2026-06-22 21:05 UTCOSV refresh
  18. 2026-06-22 14:23 UTCEPSS rescore
  19. 2026-06-21 01:57 UTCEPSS rescore
  20. 2026-06-21 01:57 UTCEPSS rescore
  21. 2026-06-19 19:23 UTCEPSS rescore
  22. 2026-06-19 19:23 UTCEPSS rescore
  23. 2026-06-18 17:50 UTCEPSS rescore
  24. 2026-06-18 17:50 UTCEPSS rescore
  25. 2026-06-17 17:50 UTCEPSS rescore
Show 47 more
  1. 2026-06-17 17:50 UTCEPSS rescore
  2. 2026-06-16 17:50 UTCEPSS rescore
  3. 2026-06-15 17:45 UTCEPSS rescore
  4. 2026-06-14 23:14 UTCEPSS rescore
  5. 2026-06-14 23:14 UTCEPSS rescore
  6. 2026-06-13 22:57 UTCEPSS rescore
  7. 2026-06-13 22:57 UTCEPSS rescore
  8. 2026-06-12 23:09 UTCEPSS rescore
  9. 2026-06-11 13:57 UTCEPSS rescore
  10. 2026-06-08 14:14 UTCEPSS rescore
  11. 2026-06-07 15:22 UTCEPSS rescore
  12. 2026-06-07 15:22 UTCEPSS rescore
  13. 2026-06-06 13:45 UTCEPSS rescore
  14. 2026-06-06 13:45 UTCEPSS rescore
  15. 2026-06-05 22:44 UTCEPSS rescore
  16. 2026-06-05 11:57 UTCOSV refresh
  17. 2026-06-05 06:08 UTCEPSS rescore
  18. 2026-06-05 06:08 UTCEPSS rescore
  19. 2026-06-04 13:10 UTCEPSS rescore
  20. 2026-06-04 13:10 UTCEPSS rescore
  21. 2026-06-02 20:10 UTCEPSS rescore
  22. 2026-06-01 13:49 UTCEPSS rescore
  23. 2026-06-01 13:49 UTCEPSS rescore
  24. 2026-05-31 22:28 UTCEPSS rescore
  25. 2026-05-31 22:28 UTCEPSS rescore
  26. 2026-05-31 00:14 UTCEPSS rescore
  27. 2026-05-29 13:41 UTCEPSS rescore
  28. 2026-05-28 13:42 UTCEPSS rescore
  29. 2026-05-28 13:42 UTCEPSS rescore
  30. 2026-05-27 13:38 UTCEPSS rescore
  31. 2026-05-27 13:38 UTCEPSS rescore
  32. 2026-05-26 13:42 UTCEPSS rescore
  33. 2026-05-26 13:42 UTCEPSS rescore
  34. 2026-05-26 07:17 UTCEPSS rescore
  35. 2026-05-24 16:44 UTCEPSS rescore
  36. 2026-05-22 21:15 UTCEPSS rescore
  37. 2026-05-22 07:35 UTCEG score recompute
  38. 2026-05-22 07:35 UTCVendor advisory
  39. 2026-05-22 07:35 UTCGHSA enrichment
  40. 2026-05-20 22:37 UTCEPSS rescore
  41. 2026-05-20 22:37 UTCEPSS rescore
  42. 2026-05-20 22:37 UTCEPSS rescore
  43. 2026-05-20 11:21 UTCEPSS rescore
  44. 2026-05-20 11:21 UTCEPSS rescore
  45. 2026-05-18 21:30 UTCEPSS rescore
  46. 2026-05-18 21:30 UTCEPSS rescore
  47. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 GitHub PoC) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-44305
    First seen Dec 11, 2017

    Linux Kernel - 'The Huge Dirty Cow' Overwriting The Huge Zero Page (2)

    Open source ↗
  • Exploit-DBEDB-43199
    First seen Nov 30, 2017

    Linux Kernel - 'The Huge Dirty Cow' Overwriting The Huge Zero Page (1)

    Open source ↗
  • GitHub PoCbindecy/HugeDirtyCowPOC
    First seen Nov 29, 2017

    A POC for the Huge Dirty Cow vulnerability (CVE-2017-1000405)

    Open source ↗

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2017-1000405?
CVE-2017-1000405 is a high vulnerability published on November 30, 2017. The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmdmkdirty() in the touchpmd() function inside the THP implementation. touchpmd() can be reached by getuserpages(). In such case, the pmd will become dirty. This scenario breaks the new canfollowwritepmd()'s logic - pmd can…
When was CVE-2017-1000405 disclosed?
CVE-2017-1000405 was first published in the National Vulnerability Database on November 30, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-1000405 actively exploited?
CVE-2017-1000405 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 85.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-1000405?
CVE-2017-1000405 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2017-1000405?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-1000405, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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