CVE-2024-27022

Kernel-memory read and write via hugetlb VMA-lock race

Published May 1, 2024 · Updated Aug 5, 2026

A race in Linux kernel 6.1 through 6.8.7 allows local users to corrupt kernel memory through concurrent fork and hugetlb hole punching. In dup_mmap, the child file VMA enters the i_mmap interval tree before hugetlb_dup_vma_private and vm_ops->open finish initializing its VMA lock. An unprivileged local account can drive both sides without a hugetlbfs mount or configured huge pages, enabling arbitrary physical-memory reads and writes or a persistent kernel hang.

CVSS severity7.8
High
EPSS probability0.27%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race in Linux kernel 6.1 through 6.8.7 allows local users to corrupt kernel memory through concurrent fork and hugetlb hole punching. In dup_mmap, the child file VMA enters the i_mmap interval tree before hugetlb_dup_vma_private and vm_ops->open finish initializing its VMA lock. An unprivileged local account can drive both sides without a hugetlbfs mount or configured huge pages, enabling arbitrary physical-memory reads and writes or a persistent kernel hang.

The record

CVE
CVE-2024-27022
Published
May 1, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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=6.1
  2. Affected versionversion=8d9bfb2608145cf3e408428c224099e1585471af <2e5cbab8ccbfc7d4a3d8a21d3c2a1f2c1aa29b5b
  3. Affected versionversion=8d9bfb2608145cf3e408428c224099e1585471af <35e351780fa9d8240dd6f7e4f245f9ea37e96c19
  4. Affected versionversion=8d9bfb2608145cf3e408428c224099e1585471af <abdb88dd272bbeb93efe01d8e0b7b17e24af3a34

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.1; version=8d9bfb2608145cf3e408428c224099e1585471af <2e5cbab8ccbfc7d4a3d8a21d3c2a1f2c1aa29b5b; version=8d9bfb2608145cf3e408428c224099e1585471af <35e351780fa9d8240dd6f7e4f245f9ea37e96c19; version=8d9bfb2608145cf3e408428c224099e1585471af <abdb88dd272bbeb93efe01d8e0b7b17e24af3a34

Published CVSS scores

7.8Linux kernel CVE teamCVSS:3.1/AV:L/AC:L/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 exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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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