CVE-2026-23129

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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 'registrar una vez'."}], "id": "CVE-2026-23129", "lastModified": "2026-11-05T22:18:03.343", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23129", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T21:20:06.194524Z", "version": "2.0.3"}}]}, "published": "2026-02-14T15:16:08.173", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/236a657422a564859dcd0db7bdb486abb21a721a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dfec0501dba8f4711ef142a6a890e4812b7af88c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f3ddbaaaaf4d0633b40482f471753f9c71294a4a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: dpll: Prevent duplicate registrations", "id": "2439876", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2439876"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndpll: Prevent duplicate registrations\nModify the internal registration helpers dpll_xa_ref_{dpll,pin}_add()\nto reject duplicate registration attempts.\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.\nFix this by updating the logic to return `-EEXIST` if a matching\nregistration is found to enforce a strict \"register once\" policy."], "name": "CVE-2026-23129", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23129\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23129\nhttps://lore.kernel.org/linux-cve-announce/2026021410-CVE-2026-23129-81ae@gregkh/T"], "threat_severity": "Moderate"}

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