Vulnary
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Critical· 9.8official fix available

CVE-2026-43125

A flaw in the Linux kernel's Distributed Lock Manager (DLM) allows for memory corruption. This occurs because the system fails to properly validate the length of certain data received from network messages.

publishedMay 6, 2026
last modifiedJul 20, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
35th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Aug 19, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Users running the Linux kernel that utilize the Distributed Lock Manager (DLM) component.

02

Real-world impact

An attacker could send specially crafted network messages to trigger an out-of-bounds write, potentially leading to system instability or unauthorized code execution.

03

Why this severity

This is a critical vulnerability because it can be exploited remotely over a network without requiring any user interaction or special privileges.

04

What to do about it

official fix available
recommended steps
  1. 01Apply the security patch that adds length validation to dlm_dump_rsb_name().
  2. 02Update the Linux kernel to the version containing the fix for CVE-2026-43125.

NVD-referenced vendor advisory

05

Timeline

  1. May 6, 2026 · May 6, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 20, 2026 · 16d ago
    Advisory updated
    The NVD record was last revised.
  3. Jul 20, 2026 · 16d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →