CVE-2025-38300

Service interruption via invalid DMA unmapping

Published Jul 10, 2025 · Updated May 11, 2026

Improper DMA cleanup in the Linux kernel sun8i-ce cipher driver allows local users to interrupt service by triggering mapping failures. On error paths in sun8i_ce_cipher_prepare(), the driver unmaps destination scatterlists and IV buffers even when the corresponding DMA mapping failed. Reaching the flaw requires local low-privileged access and an affected Allwinner crypto engine; the observed consequence is a kernel DMA-API warning and call trace.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper DMA cleanup in the Linux kernel sun8i-ce cipher driver allows local users to interrupt service by triggering mapping failures. On error paths in sun8i_ce_cipher_prepare(), the driver unmaps destination scatterlists and IV buffers even when the corresponding DMA mapping failed. Reaching the flaw requires local low-privileged access and an affected Allwinner crypto engine; the observed consequence is a kernel DMA-API warning and call trace.

The record

CVE
CVE-2025-38300
Published
Jul 10, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 10, 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=06f751b613296cc34b86fc83fccaf30d646eb8bc <19d267d9fad00d94ad8477899e38ed7c11f33fb6
  2. Affected versionversion=06f751b613296cc34b86fc83fccaf30d646eb8bc <4051250e5db489f8ad65fc337e2677b9b568ac72
  3. Affected versionversion=06f751b613296cc34b86fc83fccaf30d646eb8bc <a0ac3f85b2e3ef529e852f252a70311f9029d5e6
  4. Affected versionversion=06f751b613296cc34b86fc83fccaf30d646eb8bc <c62b79c1c51303dbcb6edfa4de0ee176f4934c52
  5. Affected versionversion=06f751b613296cc34b86fc83fccaf30d646eb8bc <f31adc3e356f7350d4a4d68c98d3f60f2f6e26b3
  6. Affected versionversion=5.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=06f751b613296cc34b86fc83fccaf30d646eb8bc <19d267d9fad00d94ad8477899e38ed7c11f33fb6; version=06f751b613296cc34b86fc83fccaf30d646eb8bc <4051250e5db489f8ad65fc337e2677b9b568ac72; version=06f751b613296cc34b86fc83fccaf30d646eb8bc <a0ac3f85b2e3ef529e852f252a70311f9029d5e6; version=06f751b613296cc34b86fc83fccaf30d646eb8bc <c62b79c1c51303dbcb6edfa4de0ee176f4934c52; version=06f751b613296cc34b86fc83fccaf30d646eb8bc <f31adc3e356f7350d4a4d68c98d3f60f2f6e26b3; version=5.5

Published CVSS scores

5.5UbuntuCVSS: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

CWE-401Missing Release of Memory after Effective Lifetime
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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