CVE-2024-38570Network attack vector

Kernel crash via stale GFS2 lock callbacks

Published Jun 19, 2024 · Updated Aug 5, 2026

Use-after-free in Linux GFS2 allows remote attackers to corrupt kernel memory and crash a node during clustered filesystem unmount. During DLM lockspace release, GFS2 frees unwanted glocks before pending bast callbacks are deactivated, so a callback can dereference a deallocated glock. Reachability requires a clustered GFS2 lockspace with outstanding locks, asynchronous contention notification, and an overlapping unmount; the resulting memory corruption can panic the affected node.

CVSS severity9.8
Critical
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux GFS2 allows remote attackers to corrupt kernel memory and crash a node during clustered filesystem unmount. During DLM lockspace release, GFS2 frees unwanted glocks before pending bast callbacks are deactivated, so a callback can dereference a deallocated glock. Reachability requires a clustered GFS2 lockspace with outstanding locks, asynchronous contention notification, and an overlapping unmount; the resulting memory corruption can panic the affected node.

The record

CVE
CVE-2024-38570
Published
Jun 19, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 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=3.8
  2. Affected versionversion=fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 <0636b34b44589b142700ac137b5f69802cfe2e37
  3. Affected versionversion=fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 <501cd8fabf621d10bd4893e37f6ce6c20523c8ca
  4. Affected versionversion=fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 <d98779e687726d8f8860f1c54b5687eec5f63a73
  5. Affected versionversion=fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 <e42e8a24d7f02d28763d16ca7ec5fc6d1f142af0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.8; version=fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 <0636b34b44589b142700ac137b5f69802cfe2e37; version=fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 <501cd8fabf621d10bd4893e37f6ce6c20523c8ca; version=fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 <d98779e687726d8f8860f1c54b5687eec5f63a73; version=fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 <e42e8a24d7f02d28763d16ca7ec5fc6d1f142af0

Published CVSS scores

9.8kernel.orgCVSS: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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Endpoint Denial of Service: Application 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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