CVE-2025-38492

Request hang via asynchronous cache-write race

Published Jul 28, 2025 · Updated May 11, 2026

Race condition in Linux kernel netfs 6.14 through 6.15.7 allows local users to hang asynchronous cache-copy requests during filesystem access. The collector can miss final cleanup when every write subrequest completes before NETFS_RREQ_ALL_QUEUED is set, because no later event queues collection. The race requires asynchronous collection and is most readily reached through Ceph copy2cache; affected requests remain stuck rather than corrupting data.

CVSS severity4.7
Medium
EPSS probability0.09%
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 netfs 6.14 through 6.15.7 allows local users to hang asynchronous cache-copy requests during filesystem access. The collector can miss final cleanup when every write subrequest completes before NETFS_RREQ_ALL_QUEUED is set, because no later event queues collection. The race requires asynchronous collection and is most readily reached through Ceph copy2cache; affected requests remain stuck rather than corrupting data.

The record

CVE
CVE-2025-38492
Published
Jul 28, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 28, 2025CVE 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=6.14
  2. Affected versionversion=e2d46f2ec332533816417b60933954173f602121 <110188a13c4853bd4c342e600ced4dfd26c3feb5
  3. Affected versionversion=e2d46f2ec332533816417b60933954173f602121 <89635eae076cd8eaa5cb752f66538c9dc6c9fdc3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=e2d46f2ec332533816417b60933954173f602121 <110188a13c4853bd4c342e600ced4dfd26c3feb5; version=e2d46f2ec332533816417b60933954173f602121 <89635eae076cd8eaa5cb752f66538c9dc6c9fdc3

Published CVSS scores

4.7UbuntuCVSS: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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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