CVE-2024-26725

Local netlink dump hang via DPLL lock inversion

Published Apr 3, 2024 · Updated May 11, 2026

Deadlock in the Linux kernel DPLL subsystem 6.7 through 6.7.5 allows local users to hang kernel netlink dump operations. __netlink_dump_start() takes dpll_lock under nlk_cb_mutex, then netlink_dump() reacquires nlk_cb_mutex while retaining dpll_lock, reversing the competing lock order. A concurrent DPLL pin dump on another CPU is required, and the documented consequence is an availability-only hang.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deadlock in the Linux kernel DPLL subsystem 6.7 through 6.7.5 allows local users to hang kernel netlink dump operations. __netlink_dump_start() takes dpll_lock under nlk_cb_mutex, then netlink_dump() reacquires nlk_cb_mutex while retaining dpll_lock, reversing the competing lock order. A concurrent DPLL pin dump on another CPU is required, and the documented consequence is an availability-only hang.

The record

CVE
CVE-2024-26725
Published
Apr 3, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 3, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.7
  2. Affected versionversion=9d71b54b65b1fb6c0d3a6c5c88ba9b915c783fbc <087739cbd0d0b87b6cec2c0799436ac66e24acc8
  3. Affected versionversion=9d71b54b65b1fb6c0d3a6c5c88ba9b915c783fbc <53c0441dd2c44ee93fddb5473885fd41e4bc2361

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=9d71b54b65b1fb6c0d3a6c5c88ba9b915c783fbc <087739cbd0d0b87b6cec2c0799436ac66e24acc8; version=9d71b54b65b1fb6c0d3a6c5c88ba9b915c783fbc <53c0441dd2c44ee93fddb5473885fd41e4bc2361

Published CVSS scores

5.5NISTCVSS:3.1/AV:L/AC:L/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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
T1499Endpoint Denial of Service

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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