CVE-2025-68205

Kernel crash via swapped HDMI codec callbacks

Published Dec 16, 2025 · Updated Dec 16, 2025

A NULL pointer dereference in Linux kernel 6.17 through 6.17.8 crashes the kernel while probing nvhdmi-mcp HDMI hardware. In sound/hda/codecs/hdmi/nvhdmi-mcp.c, swapped build_controls and build_pcms callbacks invoke build_controls before the PCM instance is initialized. The failure occurs when the affected driver probes compatible nvhdmi-mcp HDMI hardware; no attacker-controlled input path is publicly documented.

CVSS severityUnavailable
Unscored
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

A NULL pointer dereference in Linux kernel 6.17 through 6.17.8 crashes the kernel while probing nvhdmi-mcp HDMI hardware. In sound/hda/codecs/hdmi/nvhdmi-mcp.c, swapped build_controls and build_pcms callbacks invoke build_controls before the PCM instance is initialized. The failure occurs when the affected driver probes compatible nvhdmi-mcp HDMI hardware; no attacker-controlled input path is publicly documented.

The record

CVE
CVE-2025-68205
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=6.17
  2. Affected versionversion=ad781b550f9a8829e3dae4bd3d18c4a126a53d04 <82420bd4e17bdaba8453fbf9e10c58c9ed0c9727
  3. Affected versionversion=ad781b550f9a8829e3dae4bd3d18c4a126a53d04 <d2aed6fac1148528181affb781aa683d6569042b

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=6.17; version=ad781b550f9a8829e3dae4bd3d18c4a126a53d04 <82420bd4e17bdaba8453fbf9e10c58c9ed0c9727; version=ad781b550f9a8829e3dae4bd3d18c4a126a53d04 <d2aed6fac1148528181affb781aa683d6569042b

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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