CVE-2022-50373

Cluster-node disruption via DLM message race

Published Sep 17, 2025 · Updated Sep 17, 2025

Race condition in Linux kernel DLM lowcomms allows attackers to disrupt clustered filesystems through concurrent message commits. A queued send can drop the final dlm_msg reference before srcu_read_unlock reads msg->idx, leaving a stale object and garbage array index. Reachability requires an active DLM cluster and enough concurrent lock traffic to win the race; consequences include a kernel warning, DLM hang, or node panic.

CVSS severity9.8
Critical
EPSS probability0.39%
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 Linux kernel DLM lowcomms allows attackers to disrupt clustered filesystems through concurrent message commits. A queued send can drop the final dlm_msg reference before srcu_read_unlock reads msg->idx, leaving a stale object and garbage array index. Reachability requires an active DLM cluster and enough concurrent lock traffic to win the race; consequences include a kernel warning, DLM hang, or node panic.

The record

CVE
CVE-2022-50373
Published
Sep 17, 2025
Updated
Sep 17, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, T1499
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <27d3e646dd83bafd7094890462eebfce3ac31e4a
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <30ea3257e8766027c4d8d609dcbd256ff9a76073
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de7fdff754bb4d01e38e19964c309b6df6a79472
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <eb97e60a9eae632ff9104a580dbc4fdc58dc23cb

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <27d3e646dd83bafd7094890462eebfce3ac31e4a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <30ea3257e8766027c4d8d609dcbd256ff9a76073; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de7fdff754bb4d01e38e19964c309b6df6a79472; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <eb97e60a9eae632ff9104a580dbc4fdc58dc23cb

Published CVSS scores

4.7CISA ADPCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
9.8Linux kernel security teamCVSS:3.1/AV:N/AC:L/PR:N/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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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