CVE-2025-39753Public exploit

Service interruption via missing folio migration callbacks

Published Sep 11, 2025 · Updated Sep 11, 2025

Denial of service in Linux kernel GFS2 allows local users to interrupt service by triggering metadata or resource-group folio migration. The gfs2_meta_aops and gfs2_rgrp_aops tables omit migrate_folio, so move_to_new_folio enters a warning path instead of using the required buffer migration callback. The path requires local low-privileged access and a GFS2 workload that causes one of these folios to migrate; no confidentiality or integrity impact is reported.

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

What happened

Denial of service in Linux kernel GFS2 allows local users to interrupt service by triggering metadata or resource-group folio migration. The gfs2_meta_aops and gfs2_rgrp_aops tables omit migrate_folio, so move_to_new_folio enters a warning path instead of using the required buffer migration callback. The path requires local low-privileged access and a GFS2 workload that causes one of these folios to migrate; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2025-39753
Published
Sep 11, 2025
Updated
Sep 11, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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 <3d2c05cbc6a3725d832b912b637971f37301c7e5
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5c8f12cf1e64e0e8e6cb80b0c935389973e8be8d
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9d9b053f7f9c5a35049abe56af9e6ac70b6b0e4b
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9f745095c382b76e68407fd6f15ef27baf2a013f
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e89cab180eb22950b6eb7b3462623c2aa81e5835

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3d2c05cbc6a3725d832b912b637971f37301c7e5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5c8f12cf1e64e0e8e6cb80b0c935389973e8be8d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9d9b053f7f9c5a35049abe56af9e6ac70b6b0e4b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9f745095c382b76e68407fd6f15ef27baf2a013f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e89cab180eb22950b6eb7b3462623c2aa81e5835

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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

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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 exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

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Technologies

Your stack

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Your stack

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