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CVE-2017-1000405· NVD / CVE Program· CNA mitre

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 implementat

Noroxi assessment

Priority: Monitor (action score 29/100)

  • Public proof-of-concept code exists (Exploit-DB, GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.8% (FIRST EPSS); higher than 86.2% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: linux (Debian:12) 4.14.2-1; kernel (Red Hat:enterprise_linux:7::server) 0:4.11.0-44.4.1.el7a; kernel-abi-whitelists (Red Hat:enterprise_linux:7::server) 0:4.11.0-44.4.1.el7a.

Low priority for now. Upgrade to linux (Debian:12) 4.14.2-1; kernel (Red Hat:enterprise_linux:7::server) 0:4.11.0-44.4.1.el7a; kernel-abi-whitelists (Red Hat:enterprise_linux:7::server) 0:4.11.0-44.4.1.el7a or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate 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.

HighCVSS 7.0 · v3.1—Proof of concept Fix available
Published
Nov 30, 2017
Updated
Jun 16, 2026
EPSS
2.8% · 86th percentile

Report tools

JSON

Action score

29

Monitor

Low priority for now.

CVSS
28 / 40 · 7.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.8%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.2.87 and later · before 3.3
  • linux linux kernel3.10.106 and later · before 3.11
  • linux linux kernel3.12.73 and later · before 3.13
  • linux linux kernel3.16.42 and later · before 3.16.52
  • linux linux kernel3.18.55 and later · before 3.18.86
  • linux linux kernel4.1.41 and later · before 4.1.48
  • linux linux kernel4.4.70 and later · before 4.4.104
  • linux linux kernel4.9.7 and later · before 4.9.67
  • linux linux kernel4.10 and later · before 4.14.4

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 4.14.2-14.14.2-1
Red Hat:enterprise_linux:7::serverkernelbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-abi-whitelistsbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-altbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-bootwrapperbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-debugbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-debug-debuginfobefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-debug-develbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-debuginfobefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-debuginfo-common-aarch64before 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-debuginfo-common-ppc64lebefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-develbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-docbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-headersbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-toolsbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-tools-debuginfobefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-tools-libsbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverkernel-tools-libs-develbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverperfbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverperf-debuginfobefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverpython-perfbefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
Red Hat:enterprise_linux:7::serverpython-perf-debuginfobefore 0:4.11.0-44.4.1.el7a0:4.11.0-44.4.1.el7a
SUSE:Linux Enterprise Desktop 12 SP2kernel-defaultbefore 4.4.90-92.50.14.4.90-92.50.1
SUSE:Linux Enterprise Desktop 12 SP2kernel-sourcebefore 4.4.90-92.50.14.4.90-92.50.1

+43

Same product

linux: all records

Other highest-scoring records for the same primary product.

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  • CVE-2016-5195Race 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 haKEV
    83Now
  • CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV
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  • CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV
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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:linux4.14.2-1 · Debian:12Package registry (OSV)
red hat:kernel-abi-whitelists0:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-alt0:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-bootwrapper0:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debug0:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debug-devel0:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debuginfo0:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debuginfo-common-ppc64le0:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-devel0:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-doc0:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-headers0:4.11.0-44.4.1.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
suse:kernel-default3.12.74-60.64.66.1 · SUSE:OpenStack Cloud 6Package registry (OSV)
suse:kernel-docs4.4.92-6.30.2 · SUSE:Linux Enterprise Software Development Kit 12 SP3Package registry (OSV)
suse:kernel-ec23.12.74-60.64.66.1 · SUSE:Linux Enterprise Module for Public Cloud 12Package registry (OSV)
suse:kernel-obs-build4.4.92-6.30.1 · SUSE:Linux Enterprise Software Development Kit 12 SP3Package registry (OSV)
suse:kernel-source3.12.74-60.64.66.1 · SUSE:OpenStack Cloud 6Package registry (OSV)
suse:kernel-syms3.12.74-60.64.66.1 · SUSE:OpenStack Cloud 6Package registry (OSV)
suse:kernel-xen3.12.74-60.64.66.1 · SUSE:OpenStack Cloud 6Package registry (OSV)
suse:kgraft-patch-SLE12_Update_291-5.1 · SUSE:Linux Enterprise Server 12-LTSSPackage registry (OSV)
suse:kgraft-patch-SLE12-SP1_Update_231-2.1 · SUSE:OpenStack Cloud 6Package registry (OSV)
suse:kgraft-patch-SLE12-SP2_Update_115-2.1 · SUSE:Linux Enterprise Live Patching 12Package registry (OSV)
suse:kgraft-patch-SLE12-SP2_Update_151-4.1 · SUSE:Linux Enterprise Live Patching 12Package registry (OSV)
suse:kgraft-patch-SLE12-SP3_Update_51-6.1 · SUSE:Linux Enterprise Live Patching 12 SP3Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×2
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrydos2017-11-30
Exploit-DB entrydos2017-12-11
Proof-of-concept repository on GitHubstars:2002017-11-29

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-2 d
  2. Published
  3. TodayOct 12, 2026+3238 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records