CVE-2026-72154

Incorrect kernel execution via stale static-key instructions

Published Aug 15, 2026 · Updated Aug 15, 2026

Cache-coherency error in Linux 6.18 on OpenRISC SMP systems allows attackers to cause incorrect kernel execution via unspecified vectors. The jump-label update path calls kick_all_cpus_sync without invalidating every remote instruction cache and omits a required data-cache flush on non-writethrough systems, leaving stale static-key instructions after a branch update. Exposure requires an OpenRISC multiprocessor kernel and a reachable static-key update; published sources specify inconsistent execution but no confidentiality or privilege impact.

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

Cache-coherency error in Linux 6.18 on OpenRISC SMP systems allows attackers to cause incorrect kernel execution via unspecified vectors. The jump-label update path calls kick_all_cpus_sync without invalidating every remote instruction cache and omits a required data-cache flush on non-writethrough systems, leaving stale static-key instructions after a branch update. Exposure requires an OpenRISC multiprocessor kernel and a reachable static-key update; published sources specify inconsistent execution but no confidentiality or privilege impact.

The record

CVE
CVE-2026-72154
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=6.18
  2. Affected versionversion=8c30b0018f9d93391573e091960d257fd9de120a <3fac46068fe4cea22ed373432b9173a915e8e60d
  3. Affected versionversion=8c30b0018f9d93391573e091960d257fd9de120a <57740658042daf591c57d6e700d9a304d5972552
  4. Affected versionversion=8c30b0018f9d93391573e091960d257fd9de120a <aca063c9024522e4e5b9a9d1927433f6a01785a3

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=6.18; version=8c30b0018f9d93391573e091960d257fd9de120a <3fac46068fe4cea22ed373432b9173a915e8e60d; version=8c30b0018f9d93391573e091960d257fd9de120a <57740658042daf591c57d6e700d9a304d5972552; version=8c30b0018f9d93391573e091960d257fd9de120a <aca063c9024522e4e5b9a9d1927433f6a01785a3

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)
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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