CVE-2026-23129 (GCVE-0-2026-23129)
Vulnerability from cvelistv5 – Published: 2026-02-14 15:09 – Updated: 2026-02-14 15:09
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.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
9431063ad323ac864750aeba4d304389bc42ca4e , < dfec0501dba8f4711ef142a6a890e4812b7af88c
(git)
Affected: 9431063ad323ac864750aeba4d304389bc42ca4e , < 236a657422a564859dcd0db7bdb486abb21a721a (git) Affected: 9431063ad323ac864750aeba4d304389bc42ca4e , < f3ddbaaaaf4d0633b40482f471753f9c71294a4a (git) |
||
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"programFiles": [
"drivers/dpll/dpll_core.c"
],
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"versions": [
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"versions": [
{
"status": "affected",
"version": "6.7"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
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{
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"status": "unaffected",
"version": "6.12.68",
"versionType": "semver"
},
{
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"status": "unaffected",
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},
{
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"version": "6.19",
"versionType": "original_commit_for_fix"
}
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"versionStartIncluding": "6.7",
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{
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpll: Prevent duplicate registrations\n\nModify the internal registration helpers dpll_xa_ref_{dpll,pin}_add()\nto reject duplicate registration attempts.\n\nPreviously, if a caller attempted to register the same pin multiple\ntimes (with the same ops, priv, and cookie) on the same device, the core\nsilently increments the reference count and return success. This behavior\nis incorrect because if the caller makes these duplicate registrations\nthen for the first one dpll_pin_registration is allocated and for others\nthe associated dpll_pin_ref.refcount is incremented. During the first\nunregistration the associated dpll_pin_registration is freed and for\nothers WARN is fired.\n\nFix this by updating the logic to return `-EEXIST` if a matching\nregistration is found to enforce a strict \"register once\" policy."
}
],
"providerMetadata": {
"dateUpdated": "2026-02-14T15:09:57.574Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/dfec0501dba8f4711ef142a6a890e4812b7af88c"
},
{
"url": "https://git.kernel.org/stable/c/236a657422a564859dcd0db7bdb486abb21a721a"
},
{
"url": "https://git.kernel.org/stable/c/f3ddbaaaaf4d0633b40482f471753f9c71294a4a"
}
],
"title": "dpll: Prevent duplicate registrations",
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"assignerShortName": "Linux",
"cveId": "CVE-2026-23129",
"datePublished": "2026-02-14T15:09:57.574Z",
"dateReserved": "2026-01-13T15:37:45.971Z",
"dateUpdated": "2026-02-14T15:09:57.574Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-23129\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-14T15:16:08.173\",\"lastModified\":\"2026-02-18T17:52:44.520\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndpll: Prevent duplicate registrations\\n\\nModify the internal registration helpers dpll_xa_ref_{dpll,pin}_add()\\nto reject duplicate registration attempts.\\n\\nPreviously, if a caller attempted to register the same pin multiple\\ntimes (with the same ops, priv, and cookie) on the same device, the core\\nsilently increments the reference count and return success. This behavior\\nis incorrect because if the caller makes these duplicate registrations\\nthen for the first one dpll_pin_registration is allocated and for others\\nthe associated dpll_pin_ref.refcount is incremented. During the first\\nunregistration the associated dpll_pin_registration is freed and for\\nothers WARN is fired.\\n\\nFix this by updating the logic to return `-EEXIST` if a matching\\nregistration is found to enforce a strict \\\"register once\\\" policy.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\ndpll: Prevenir registros duplicados\\n\\nModificar las funciones auxiliares de registro internas dpll_xa_ref_{dpll,pin}_add() para rechazar intentos de registro duplicados.\\n\\nAnteriormente, si un llamador intentaba registrar el mismo pin m\u00faltiples veces (con las mismas ops, priv y cookie) en el mismo dispositivo, el n\u00facleo incrementaba silenciosamente el contador de referencias y devolv\u00eda \u00e9xito. Este comportamiento es incorrecto porque si el llamador realiza estos registros duplicados, entonces para el primero se asigna dpll_pin_registration y para los dem\u00e1s se incrementa el dpll_pin_ref.refcount asociado. Durante la primera anulaci\u00f3n de registro se libera el dpll_pin_registration asociado y para los dem\u00e1s se dispara una advertencia.\\n\\nEsto se soluciona actualizando la l\u00f3gica para devolver -EEXIST si se encuentra un registro coincidente, para aplicar una pol\u00edtica estricta de \u0027registrar una vez\u0027.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/236a657422a564859dcd0db7bdb486abb21a721a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dfec0501dba8f4711ef142a6a890e4812b7af88c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f3ddbaaaaf4d0633b40482f471753f9c71294a4a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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