CVE-2026-80623

Trace disruption via lost CoreSight state

Published Aug 28, 2026 · Updated Aug 28, 2026

Incorrect state preservation in Linux kernel 5.13 allows local users to interrupt CoreSight tracing during CPU power down. The CoreSight ETE setup leaves save_state disabled for system-register ETMs on ACPI boots and relies on an undocumented device-tree property, so power loss discards trace-register context; probing also writes shared configuration without isolating device settings. The condition requires Arm CoreSight ETE or system-register ETM, CPU power management, and an ACPI boot or missing device-tree opt-in; it can interrupt tracing with a claim-tag warning.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect state preservation in Linux kernel 5.13 allows local users to interrupt CoreSight tracing during CPU power down. The CoreSight ETE setup leaves save_state disabled for system-register ETMs on ACPI boots and relies on an undocumented device-tree property, so power loss discards trace-register context; probing also writes shared configuration without isolating device settings. The condition requires Arm CoreSight ETE or system-register ETM, CPU power management, and an ACPI boot or missing device-tree opt-in; it can interrupt tracing with a claim-tag warning.

The record

CVE
CVE-2026-80623
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 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.

  1. Affected versionversion=35e1c9163e025855f23a68f2470c471509e5d779 <293dacd5b6a9f1275d92ca6c4fd874e54b2c8319
  2. Affected versionversion=35e1c9163e025855f23a68f2470c471509e5d779 <2ab4645fe4206c142a5f1491e191c906279686cf
  3. Affected versionversion=35e1c9163e025855f23a68f2470c471509e5d779 <65d87f28daec31903fc39fee0744f7a0059c19f2
  4. Affected versionversion=5.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=35e1c9163e025855f23a68f2470c471509e5d779 <293dacd5b6a9f1275d92ca6c4fd874e54b2c8319; version=35e1c9163e025855f23a68f2470c471509e5d779 <2ab4645fe4206c142a5f1491e191c906279686cf; version=35e1c9163e025855f23a68f2470c471509e5d779 <65d87f28daec31903fc39fee0744f7a0059c19f2; version=5.13

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
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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