CVE-2024-50066Public exploit

Local privilege escalation via stale PMD race

Published Oct 23, 2024 · Updated Aug 5, 2026

A race condition in Linux kernel memory management allows local users to gain kernel privileges through shared-memory THP mappings. move_page_tables reads a PMD before taking rmap locks, so concurrent retract_page_tables removal lets move_normal_pmd populate a bogus page-table entry, including physical page zero on x86. Exploitation requires local low-privileged access and creation of shmem or file THP mappings; successful exploitation grants kernel-level control and can also crash the host.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in Linux kernel memory management allows local users to gain kernel privileges through shared-memory THP mappings. move_page_tables reads a PMD before taking rmap locks, so concurrent retract_page_tables removal lets move_normal_pmd populate a bogus page-table entry, including physical page zero on x86. Exploitation requires local low-privileged access and creation of shmem or file THP mappings; successful exploitation grants kernel-level control and can also crash the host.

The record

CVE
CVE-2024-50066
Published
Oct 23, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1d65b771bc08cd054cf6d3766a72e113dc46d62f <1552ce9ce8af47c0fe911682e5e1855e25851ca9
  2. Affected versionversion=1d65b771bc08cd054cf6d3766a72e113dc46d62f <17396e32f975130b3e6251f024c8807d192e4c3e
  3. Affected versionversion=1d65b771bc08cd054cf6d3766a72e113dc46d62f <6fa1066fc5d00cb9f1b0e83b7ff6ef98d26ba2aa
  4. Affected versionversion=6.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1d65b771bc08cd054cf6d3766a72e113dc46d62f <1552ce9ce8af47c0fe911682e5e1855e25851ca9; version=1d65b771bc08cd054cf6d3766a72e113dc46d62f <17396e32f975130b3e6251f024c8807d192e4c3e; version=1d65b771bc08cd054cf6d3766a72e113dc46d62f <6fa1066fc5d00cb9f1b0e83b7ff6ef98d26ba2aa; version=6.6
The Linux Kernel Organization · Linux Kernelversion=1d65b771bc08 <1552ce9ce8af; version=1d65b771bc08 <17396e32f975; version=1d65b771bc08 <6fa1066fc5d0; version=6.6 <6.6.58

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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