CVE-2026-89866Hinoki check available

Kernel panic via suspended Wave5 register access

Published Sep 16, 2026 · Updated Sep 16, 2026

Denial of service in the Wave5 decoder in Linux 6.8 allows local users to panic the kernel through stream-stop operations. The decoder stop and abort paths set the EOS flag through send_firmware_command(), which accesses VPU registers without first resuming a runtime-suspended device. Exploitation requires local access to the Wave5 video device on compatible VPU hardware and causes an asynchronous SError that crashes the host.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in the Wave5 decoder in Linux 6.8 allows local users to panic the kernel through stream-stop operations. The decoder stop and abort paths set the EOS flag through send_firmware_command(), which accesses VPU registers without first resuming a runtime-suspended device. Exploitation requires local access to the Wave5 video device on compatible VPU hardware and causes an asynchronous SError that crashes the host.

The record

CVE
CVE-2026-89866
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=6.8
  2. Affected versionversion=9707a6254a8a6b978bde811a44fe07d86c229d1c <2215e55ee1e5e69ad53862d968360c5aa63dd3a7
  3. Affected versionversion=9707a6254a8a6b978bde811a44fe07d86c229d1c <a52e6f7923c17a672135b485ffd96fbd72f46267

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.8; version=9707a6254a8a6b978bde811a44fe07d86c229d1c <2215e55ee1e5e69ad53862d968360c5aa63dd3a7; version=9707a6254a8a6b978bde811a44fe07d86c229d1c <a52e6f7923c17a672135b485ffd96fbd72f46267

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 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.

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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