CVE-2026-23129 (GCVE-0-2026-23129)

Vulnerability from cvelistv5 – Published: 2026-02-14 15:09 – Updated: 2026-11-05 21:23
VLAI
Title
dpll: Prevent duplicate registrations
Summary
In the Linux kernel, the following vulnerability has been resolved: dpll: Prevent duplicate registrations Modify the internal registration helpers dpll_xa_ref_{dpll,pin}_add() to reject duplicate registration attempts. Previously, if a caller attempted to register the same pin multiple times (with the same ops, priv, and cookie) on the same device, the core silently increments the reference count and return success. This behavior is incorrect because if the caller makes these duplicate registrations then for the first one dpll_pin_registration is allocated and for others the associated dpll_pin_ref.refcount is incremented. During the first unregistration the associated dpll_pin_registration is freed and for others WARN is fired. Fix this by updating the logic to return `-EEXIST` if a matching registration is found to enforce a strict "register once" policy.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 21:20 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6637 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9431063ad323ac864750aeba4d304389bc42ca4e , < dfec0501dba8f4711ef142a6a890e4812b7af88c (git)
Affected: 9431063ad323ac864750aeba4d304389bc42ca4e , < 236a657422a564859dcd0db7bdb486abb21a721a (git)
Affected: 9431063ad323ac864750aeba4d304389bc42ca4e , < f3ddbaaaaf4d0633b40482f471753f9c71294a4a (git)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.68 , ≤ 6.12.* (semver)
Unaffected: 6.18.8 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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