Kernel warning via duplicate DPLL registration
Published Feb 14, 2026 · Updated Feb 14, 2026
Availability flaw in Linux Kernel 6.7 allows local users to trigger kernel warnings through duplicate DPLL pin registration. The dpll_xa_ref_dpll_add() and dpll_xa_ref_pin_add() helpers accept an identical ops, priv, and cookie tuple again and increment its reference count, so the first unregistration frees the registration and later unregister operations raise WARN. Triggering requires a local low-privileged path that registers the same DPLL pin repeatedly; no confidentiality or integrity impact is reported.
Summary
What happened
Availability flaw in Linux Kernel 6.7 allows local users to trigger kernel warnings through duplicate DPLL pin registration. The dpll_xa_ref_dpll_add() and dpll_xa_ref_pin_add() helpers accept an identical ops, priv, and cookie tuple again and increment its reference count, so the first unregistration frees the registration and later unregister operations raise WARN. Triggering requires a local low-privileged path that registers the same DPLL pin repeatedly; no confidentiality or integrity impact is reported.
The record
- CVE
- CVE-2026-23129
- Published
- Feb 14, 2026
- Updated
- Feb 14, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 14, 2026CVE publishedPublication date reported by the CVE source.
- Feb 14, 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=6.7
- Affected versionversion=9431063ad323ac864750aeba4d304389bc42ca4e <236a657422a564859dcd0db7bdb486abb21a721a
- Affected versionversion=9431063ad323ac864750aeba4d304389bc42ca4e <dfec0501dba8f4711ef142a6a890e4812b7af88c
- Affected versionversion=9431063ad323ac864750aeba4d304389bc42ca4e <f3ddbaaaaf4d0633b40482f471753f9c71294a4a
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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