CVE-2025-38336Public exploit

System hang via ATAPI DMA controller bug

Published Jul 10, 2025 · Updated May 23, 2026

Denial of service in the Linux kernel pata_via driver allows local users to hang systems through ATAPI DMA on affected VIA controllers. The via_mode_filter path allowed DMA for ATAPI devices on VT6415/VT6330-class hardware because its PIO restriction covered only DMI-listed systems, not the controller ID. Triggering requires an affected controller and ATAPI optical device; reading disc metadata can hard-hang the host, while attached hard drives are unaffected.

CVSS severity5.5
Medium
EPSS probability0.17%
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 the Linux kernel pata_via driver allows local users to hang systems through ATAPI DMA on affected VIA controllers. The via_mode_filter path allowed DMA for ATAPI devices on VT6415/VT6330-class hardware because its PIO restriction covered only DMI-listed systems, not the controller ID. Triggering requires an affected controller and ATAPI optical device; reading disc metadata can hard-hang the host, while attached hard drives are unaffected.

The record

CVE
CVE-2025-38336
Published
Jul 10, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 10, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.27.19 <2.6.28
  2. Affected versionversion=2.6.28.7 <2.6.29
  3. Affected versionversion=2.6.29
  4. Affected versionversion=466909ba06d0bfd5423cd5ca9bea22e43384377e
  5. Affected versionversion=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <0d9a48dfa934f43ac839211ae4aeba34f666a9a5
  6. Affected versionversion=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <67d66a5e4583fd3bcf13d6f747e571df13cbad51
  7. Affected versionversion=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <7fc89c218fc96a296a2840b1e37f4e0975f7a108
  8. Affected versionversion=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <8212cd92fe40aae6fe5a073bc70e758c42bb4bfc
  9. Affected versionversion=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <8edfed4439b107d62151ff6c075958d169da3e71
  10. Affected versionversion=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <947f9304d3c876c6672b947b80c0ef51161c6d2f
  11. Affected versionversion=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <bb7212ee4ff086628a2c1c22336d082a87cb893d
  12. Affected versionversion=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <d29fc02caad7f94b62d56ee1b01c954f9c961ba7
  13. Affected versionversion=95cfc84fd09cb77669da9ae6e9ad5ced027ca483

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.27.19 <2.6.28; version=2.6.28.7 <2.6.29; version=2.6.29; version=466909ba06d0bfd5423cd5ca9bea22e43384377e; version=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <0d9a48dfa934f43ac839211ae4aeba34f666a9a5; version=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <67d66a5e4583fd3bcf13d6f747e571df13cbad51; version=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <7fc89c218fc96a296a2840b1e37f4e0975f7a108; version=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <8212cd92fe40aae6fe5a073bc70e758c42bb4bfc; version=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <8edfed4439b107d62151ff6c075958d169da3e71; version=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <947f9304d3c876c6672b947b80c0ef51161c6d2f; version=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <bb7212ee4ff086628a2c1c22336d082a87cb893d; version=5955c7a2cfb6a35429adea5dc480002b15ca8cfc <d29fc02caad7f94b62d56ee1b01c954f9c961ba7; version=95cfc84fd09cb77669da9ae6e9ad5ced027ca483

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.5OracleCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

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 exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

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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