CVE-2025-68220

Kernel crash via inconsistent DMA-channel error return

Published Dec 16, 2025 · Updated Dec 16, 2025

An error-handling flaw in the Linux kernel before 6.18 causes a kernel crash when TI NetCP DMA-channel initialization fails. The knav_dma_open_channel implementation returns neither NULL nor ERR_PTR on some failures, so netcp_free_navigator_resources passes an invalid channel value to knav_dma_close_channel. Exposure is limited to systems using the TI NetCP path on Keystone hardware, and the documented consequence is an alignment fault and kernel crash during interface bring-up.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An error-handling flaw in the Linux kernel before 6.18 causes a kernel crash when TI NetCP DMA-channel initialization fails. The knav_dma_open_channel implementation returns neither NULL nor ERR_PTR on some failures, so netcp_free_navigator_resources passes an invalid channel value to knav_dma_close_channel. Exposure is limited to systems using the TI NetCP path on Keystone hardware, and the documented consequence is an alignment fault and kernel crash during interface bring-up.

The record

CVE
CVE-2025-68220
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 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=4.12
  2. Affected versionversion=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <2572c358ee434ce4b994472cceeb4043cbff5bc5
  3. Affected versionversion=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <3afeb909c3e2e0eb19b1e20506196e5f2d9c2259
  4. Affected versionversion=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <8427218ecbd7f8559c37972e66cb0fa06e82353b
  5. Affected versionversion=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <90a88306eb874fe4bbdd860e6c9787f5bbc588b5
  6. Affected versionversion=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <952637c5b9be64539cd0e13ef88db71a1df46373
  7. Affected versionversion=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <af6b10a13fc0aee37df4a8292414cc055c263fa3
  8. Affected versionversion=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <f9608637ecc165d7d6341df105aee44691461fb9
  9. Affected versionversion=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <fbb53727ca789a8d27052aab4b77ca9e2a0fae2b

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <2572c358ee434ce4b994472cceeb4043cbff5bc5; version=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <3afeb909c3e2e0eb19b1e20506196e5f2d9c2259; version=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <8427218ecbd7f8559c37972e66cb0fa06e82353b; version=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <90a88306eb874fe4bbdd860e6c9787f5bbc588b5; version=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <952637c5b9be64539cd0e13ef88db71a1df46373; version=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <af6b10a13fc0aee37df4a8292414cc055c263fa3; version=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <f9608637ecc165d7d6341df105aee44691461fb9; version=5b6cb43b4d625b04a4049d727a116edbfe5cf0f4 <fbb53727ca789a8d27052aab4b77ca9e2a0fae2b

Published CVSS scores

No CVSS assessment is available in this record.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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