CVE-2026-99214

Kernel warning via disabled HDMI Packet RAM

Published Oct 28, 2026 · Updated Oct 28, 2026

A power-state ordering bug in Linux's VC4 HDMI driver allows local users to trigger a kernel warning during HDMI audio startup. The vc4_hdmi_write_infoframe() function attempts to store an audio infoframe while Packet RAM remains disabled because video restoration has not yet enabled it. Triggering requires applicable HDMI hardware and audio startup preceding video restoration during hotplug handling; the upstream fix documents a warning rather than a system crash.

CVSS severityUnavailable

Unscored

EPSS probability0.16%

Next 30 days · Nov 1, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

Coverage for this vulnerability

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Summary

What happened

The record

CVE: CVE-2026-99214
Published: Oct 28, 2026
Updated: Oct 28, 2026

Vendor: The Linux Kernel Organization
Product: Linux
Classifications: Unavailable

Attack vector: local
Privileges: Unavailable

Timeline

How it unfolded

Oct 28, 2026CVE publishedPublication date reported by the CVE source.
Oct 28, 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.

Affected versionversion=6.11
Affected versionversion=b47a72f30768ffe76e105b3e91ad7022003e8504 <3f57b34485dc01e5a2db60a89a6ae5439a897e53
Affected versionversion=b47a72f30768ffe76e105b3e91ad7022003e8504 <6a987992c78e2e04f71e685d1c589f8ea2151fa2
Affected versionversion=b47a72f30768ffe76e105b3e91ad7022003e8504 <6b03e354526f6bad60ed3a7f08fec8b7d29d2f27

What conditions does exploitation require?

Attack vectorlocal

Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=b47a72f30768ffe76e105b3e91ad7022003e8504 <3f57b34485dc01e5a2db60a89a6ae5439a897e53; version=b47a72f30768ffe76e105b3e91ad7022003e8504 <6a987992c78e2e04f71e685d1c589f8ea2151fa2; version=b47a72f30768ffe76e105b3e91ad7022003e8504 <6b03e354526f6bad60ed3a7f08fec8b7d29d2f27

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026

Latest reporting daySep 28, 2026

Latest daily unique IPsUnavailable

Prior 30-day averageUnavailable

SourceShadowserver honeypots (KEV)

Vectorlocal

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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