CVE-2026-80989Hinoki check available

Kernel crash via stale Thunderbolt connection state

Published Sep 11, 2026 · Updated Sep 11, 2026

Improper connection-state handling in Linux allows attackers to crash the kernel via a failed ThunderboltIP connection. Failure paths in tbnet_connected_work() unwind resources but leave login_sent set, so tbnet_tear_down() repeats teardown and can release a transmit path the connection never owned. A crash requires panic_on_warn; otherwise the stale state can emit warnings and disrupt ThunderboltIP path ownership.

CVSS severityUnavailable
Unscored
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper connection-state handling in Linux allows attackers to crash the kernel via a failed ThunderboltIP connection. Failure paths in tbnet_connected_work() unwind resources but leave login_sent set, so tbnet_tear_down() repeats teardown and can release a transmit path the connection never owned. A crash requires panic_on_warn; otherwise the stale state can emit warnings and disrupt ThunderboltIP path ownership.

The record

CVE
CVE-2026-80989
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
adjacent
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 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=4.15
  2. Affected versionversion=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <3c8b26ebf525ba5960510f48c6e9936a79ebe76f
  3. Affected versionversion=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <d6c0af293129345a17dc31c9b4179dc7f3d6af7a
  4. Affected versionversion=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <ed1d6e3d735e7b03f43a02f4306c89eb7663da14
  5. Affected versionversion=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <f01e6a35c440b62f060e21f36b385e574a7f308c

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <3c8b26ebf525ba5960510f48c6e9936a79ebe76f; version=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <d6c0af293129345a17dc31c9b4179dc7f3d6af7a; version=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <ed1d6e3d735e7b03f43a02f4306c89eb7663da14; version=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <f01e6a35c440b62f060e21f36b385e574a7f308c

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)
Vectoradjacent
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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