CVE-2025-38043

Local service interruption via unset FFA DMA mask

Published Jun 18, 2025 · Updated May 11, 2026

Denial of service in affected Linux kernel releases starting at 5.14 allows local users to interrupt service via DMA allocation on an FFA device. The FFA bus registration path leaves dev->dma_mask unset instead of pointing it to coherent_dma_mask, causing dma_alloc_attrs() to warn when allocation uses the device pointer. Reaching the flaw requires low-privileged local access and an active Arm FFA device, while the exact interruption mode is not published.

CVSS severity5.5
Medium
EPSS probability0.18%
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 affected Linux kernel releases starting at 5.14 allows local users to interrupt service via DMA allocation on an FFA device. The FFA bus registration path leaves dev->dma_mask unset instead of pointing it to coherent_dma_mask, causing dma_alloc_attrs() to warn when allocation uses the device pointer. Reaching the flaw requires low-privileged local access and an active Arm FFA device, while the exact interruption mode is not published.

The record

CVE
CVE-2025-38043
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=5.14
  2. Affected versionversion=e781858488b918e30a6ff28e9eab6058b787e3b3 <2e62c803feec1ef5847d8fa47dd0de039abfa378
  3. Affected versionversion=e781858488b918e30a6ff28e9eab6058b787e3b3 <3a3efeef64364c2a028cf0d03d68c831813a97fd
  4. Affected versionversion=e781858488b918e30a6ff28e9eab6058b787e3b3 <97bab02f0b64ba6bcdf6a8fae561db07f509aee9
  5. Affected versionversion=e781858488b918e30a6ff28e9eab6058b787e3b3 <c6aa1d6bd6ccff4ecdf064d288817657ec8532f0
  6. Affected versionversion=e781858488b918e30a6ff28e9eab6058b787e3b3 <cc0aac7ca17e0ea3ca84b552fc79f3e86fd07f53
  7. Affected versionversion=e781858488b918e30a6ff28e9eab6058b787e3b3 <e2de76c34a8a925efe80fccae4810427bc144ed0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=e781858488b918e30a6ff28e9eab6058b787e3b3 <2e62c803feec1ef5847d8fa47dd0de039abfa378; version=e781858488b918e30a6ff28e9eab6058b787e3b3 <3a3efeef64364c2a028cf0d03d68c831813a97fd; version=e781858488b918e30a6ff28e9eab6058b787e3b3 <97bab02f0b64ba6bcdf6a8fae561db07f509aee9; version=e781858488b918e30a6ff28e9eab6058b787e3b3 <c6aa1d6bd6ccff4ecdf064d288817657ec8532f0; version=e781858488b918e30a6ff28e9eab6058b787e3b3 <cc0aac7ca17e0ea3ca84b552fc79f3e86fd07f53; version=e781858488b918e30a6ff28e9eab6058b787e3b3 <e2de76c34a8a925efe80fccae4810427bc144ed0

Published CVSS scores

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

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

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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