{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-21685", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.740Z", "datePublished": "2025-02-09T11:37:25.264Z", "dateUpdated": "2025-10-01T19:57:10.798Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:19:01.355Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: fix serdev race\n\nThe yt2_1380_fc_serdev_probe() function calls devm_serdev_device_open()\nbefore setting the client ops via serdev_device_set_client_ops(). This\nordering can trigger a NULL pointer dereference in the serdev controller's\nreceive_buf handler, as it assumes serdev->ops is valid when\nSERPORT_ACTIVE is set.\n\nThis is similar to the issue fixed in commit 5e700b384ec1\n(\"platform/chrome: cros_ec_uart: properly fix race condition\") where\ndevm_serdev_device_open() was called before fully initializing the\ndevice.\n\nFix the race by ensuring client ops are set before enabling the port via\ndevm_serdev_device_open().\n\nNote, serdev_device_set_baudrate() and serdev_device_set_flow_control()\ncalls should be after the devm_serdev_device_open() call."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/platform/x86/lenovo-yoga-tab2-pro-1380-fastcharger.c"], "versions": [{"version": "b2ed33e8d486ab2f1920131dd76fab38c8ef3550", "lessThan": "3f67e07873df3c6d9ce2582260b83732e1d3a40b", "status": "affected", "versionType": "git"}, {"version": "b2ed33e8d486ab2f1920131dd76fab38c8ef3550", "lessThan": "59616a91e5e74833b2008b56c66879857c616006", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/platform/x86/lenovo-yoga-tab2-pro-1380-fastcharger.c"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.11", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.12.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3f67e07873df3c6d9ce2582260b83732e1d3a40b"}, {"url": "https://git.kernel.org/stable/c/59616a91e5e74833b2008b56c66879857c616006"}], "title": "platform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: fix serdev race", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2025-21685", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-01T19:51:40.850980Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T19:57:10.798Z"}}]}}

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This\nordering can trigger a NULL pointer dereference in the serdev controller's\nreceive_buf handler, as it assumes serdev->ops is valid when\nSERPORT_ACTIVE is set.\n\nThis is similar to the issue fixed in commit 5e700b384ec1\n(\"platform/chrome: cros_ec_uart: properly fix race condition\") where\ndevm_serdev_device_open() was called before fully initializing the\ndevice.\n\nFix the race by ensuring client ops are set before enabling the port via\ndevm_serdev_device_open().\n\nNote, serdev_device_set_baudrate() and serdev_device_set_flow_control()\ncalls should be after the devm_serdev_device_open() call."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: platform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: corregir la condici\u00f3n de ejecuci\u00f3n de serdev La funci\u00f3n yt2_1380_fc_serdev_probe() llama a devm_serdev_device_open() antes de configurar las operaciones del cliente a trav\u00e9s de serdev_device_set_client_ops(). Este orden puede desencadenar una desreferencia de puntero NULL en el controlador de recepci\u00f3n de serdev, ya que asume que serdev->ops es v\u00e1lido cuando SERPORT_ACTIVE est\u00e1 configurado. Esto es similar al problema corregido en el commit 5e700b384ec1 (\"platform/chrome: cros_ec_uart: corregir correctamente la condici\u00f3n de ejecuci\u00f3n\") donde se llam\u00f3 a devm_serdev_device_open() antes de inicializar completamente el dispositivo. Corrija la ejecuci\u00f3n asegur\u00e1ndose de que las operaciones del cliente est\u00e9n configuradas antes de habilitar el puerto a trav\u00e9s de devm_serdev_device_open(). Tenga en cuenta que las llamadas a serdev_device_set_baudrate() y serdev_device_set_flow_control() deben realizarse despu\u00e9s de la llamada a devm_serdev_device_open(). "}], "id": "CVE-2025-21685", "lastModified": "2025-10-01T20:18:20.300", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-02-09T12:15:29.737", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3f67e07873df3c6d9ce2582260b83732e1d3a40b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/59616a91e5e74833b2008b56c66879857c616006"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: platform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: fix serdev race", "id": "2344536", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2344536"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nplatform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: fix serdev race\nThe yt2_1380_fc_serdev_probe() function calls devm_serdev_device_open()\nbefore setting the client ops via serdev_device_set_client_ops(). This\nordering can trigger a NULL pointer dereference in the serdev controller's\nreceive_buf handler, as it assumes serdev->ops is valid when\nSERPORT_ACTIVE is set.\nThis is similar to the issue fixed in commit 5e700b384ec1\n(\"platform/chrome: cros_ec_uart: properly fix race condition\") where\ndevm_serdev_device_open() was called before fully initializing the\ndevice.\nFix the race by ensuring client ops are set before enabling the port via\ndevm_serdev_device_open().\nNote, serdev_device_set_baudrate() and serdev_device_set_flow_control()\ncalls should be after the devm_serdev_device_open() call."], "name": "CVE-2025-21685", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21685\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21685\nhttps://lore.kernel.org/linux-cve-announce/2025020931-CVE-2025-21685-d720@gregkh/T"], "threat_severity": "Low"}