CVE-2024-36943

Local service interruption via PTE-update race

Published May 30, 2024 · Updated Aug 5, 2026

Race condition in the Linux kernel 6.7 through 6.8.9 and 6.9-rc1 through 6.9-rc7 allows local users to interrupt service. The make_uffd_wp_pte() path reads a page-table entry before ptep_modify_prot_start() atomically clears it, so a concurrent access or dirtying event can be overwritten when protection is committed. Exploitation requires local low-privileged access and winning that race during a pagemap scan; the bounded impact is loss of young or dirty state and service interruption.

CVSS severity4.7
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel 6.7 through 6.8.9 and 6.9-rc1 through 6.9-rc7 allows local users to interrupt service. The make_uffd_wp_pte() path reads a page-table entry before ptep_modify_prot_start() atomically clears it, so a concurrent access or dirtying event can be overwritten when protection is committed. Exploitation requires local low-privileged access and winning that race during a pagemap scan; the bounded impact is loss of young or dirty state and service interruption.

The record

CVE
CVE-2024-36943
Published
May 30, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 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=52526ca7fdb905a768a93f8faa418e9b988fc34b <74b3d66f91d9f539f99faad74d796fa9a389a015
  2. Affected versionversion=52526ca7fdb905a768a93f8faa418e9b988fc34b <c70dce4982ce1718bf978a35f8e26160b82081f4
  3. Affected versionversion=6.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=52526ca7fdb905a768a93f8faa418e9b988fc34b <74b3d66f91d9f539f99faad74d796fa9a389a015; version=52526ca7fdb905a768a93f8faa418e9b988fc34b <c70dce4982ce1718bf978a35f8e26160b82081f4; version=6.7

Published CVSS scores

4.7NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1499.004Application or System Exploitation

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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