CVE-2025-38682

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38682", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.031Z", "datePublished": "2025-09-04T15:32:37.403Z", "dateUpdated": "2026-05-11T21:32:56.493Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:32:56.493Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: core: Fix double-free of fwnode in i2c_unregister_device()\n\nBefore commit df6d7277e552 (\"i2c: core: Do not dereference fwnode in struct\ndevice\"), i2c_unregister_device() only called fwnode_handle_put() on\nof_node-s in the form of calling of_node_put(client->dev.of_node).\n\nBut after this commit the i2c_client's fwnode now unconditionally gets\nfwnode_handle_put() on it.\n\nWhen the i2c_client has no primary (ACPI / OF) fwnode but it does have\na software fwnode, the software-node will be the primary node and\nfwnode_handle_put() will put() it.\n\nBut for the software fwnode device_remove_software_node() will also put()\nit leading to a double free:\n\n[ 82.665598] ------------[ cut here ]------------\n[ 82.665609] refcount_t: underflow; use-after-free.\n[ 82.665808] WARNING: CPU: 3 PID: 1502 at lib/refcount.c:28 refcount_warn_saturate+0xba/0x11\n...\n[ 82.666830] RIP: 0010:refcount_warn_saturate+0xba/0x110\n...\n[ 82.666962] <TASK>\n[ 82.666971] i2c_unregister_device+0x60/0x90\n\nFix this by not calling fwnode_handle_put() when the primary fwnode is\na software-node."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/i2c/i2c-core-base.c"], "versions": [{"version": "df6d7277e5525d6cce63127dd93ebec4c6354fa0", "lessThan": "ffe02f7c4e36090154646612e67d331832f92037", "status": "affected", "versionType": "git"}, {"version": "df6d7277e5525d6cce63127dd93ebec4c6354fa0", "lessThan": "1c24e5fc0c7096e00c202a6a3e0c342c1afb47c2", "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/i2c/i2c-core-base.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.2", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17", "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": "6.16", "versionEndExcluding": "6.16.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ffe02f7c4e36090154646612e67d331832f92037"}, {"url": "https://git.kernel.org/stable/c/1c24e5fc0c7096e00c202a6a3e0c342c1afb47c2"}], "title": "i2c: core: Fix double-free of fwnode in i2c_unregister_device()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/i2c/i2c-core-base.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ffe02f7c4e36090154646612e67d331832f92037", "status": "affected", "version": "df6d7277e5525d6cce63127dd93ebec4c6354fa0", "versionType": "git"}, {"lessThan": "1c24e5fc0c7096e00c202a6a3e0c342c1afb47c2", "status": "affected", "version": "df6d7277e5525d6cce63127dd93ebec4c6354fa0", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/i2c/i2c-core-base.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.16.*", "status": "unaffected", "version": "6.16.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.17", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BD7C087D-2415-4521-B624-30003352F899", "versionEndExcluding": "6.16.2", "versionStartIncluding": "6.16", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: core: Fix double-free of fwnode in i2c_unregister_device()\n\nBefore commit df6d7277e552 (\"i2c: core: Do not dereference fwnode in struct\ndevice\"), i2c_unregister_device() only called fwnode_handle_put() on\nof_node-s in the form of calling of_node_put(client->dev.of_node).\n\nBut after this commit the i2c_client's fwnode now unconditionally gets\nfwnode_handle_put() on it.\n\nWhen the i2c_client has no primary (ACPI / OF) fwnode but it does have\na software fwnode, the software-node will be the primary node and\nfwnode_handle_put() will put() it.\n\nBut for the software fwnode device_remove_software_node() will also put()\nit leading to a double free:\n\n[ 82.665598] ------------[ cut here ]------------\n[ 82.665609] refcount_t: underflow; use-after-free.\n[ 82.665808] WARNING: CPU: 3 PID: 1502 at lib/refcount.c:28 refcount_warn_saturate+0xba/0x11\n...\n[ 82.666830] RIP: 0010:refcount_warn_saturate+0xba/0x110\n...\n[ 82.666962] <TASK>\n[ 82.666971] i2c_unregister_device+0x60/0x90\n\nFix this by not calling fwnode_handle_put() when the primary fwnode is\na software-node."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ni2c: core: Correcci\u00f3n de doble liberaci\u00f3n de fwnode en i2c_unregister_device()\n\nAntes del commit df6d7277e552 ('i2c: core: No desreferenciar fwnode en struct device'), i2c_unregister_device() solo llamaba a fwnode_handle_put() en los of_node en la forma de llamar a of_node_put(client->dev.of_node).\n\nPero despu\u00e9s de este commit, el fwnode del i2c_client ahora recibe incondicionalmente fwnode_handle_put() sobre \u00e9l.\n\nCuando el i2c_client no tiene un fwnode primario (ACPI / OF) pero s\u00ed tiene un fwnode de software, el nodo de software ser\u00e1 el nodo primario y fwnode_handle_put() lo liberar\u00e1.\n\nPero para el fwnode de software, device_remove_software_node() tambi\u00e9n lo liberar\u00e1, lo que lleva a una doble liberaci\u00f3n:\n\n[ 82.665598] ------------[ cut here ]------------\n[ 82.665609] refcount_t: desbordamiento inferior; uso despu\u00e9s de liberaci\u00f3n.\n[ 82.665808] ADVERTENCIA: CPU: 3 PID: 1502 en lib/refcount.c:28 refcount_warn_saturate+0xba/0x11\n...\n[ 82.666830] RIP: 0010:refcount_warn_saturate+0xba/0x110\n...\n[ 82.666962] <TAREA>\n[ 82.666971] i2c_unregister_device+0x60/0x90\n\nSolucione esto al no llamar a fwnode_handle_put() cuando el fwnode primario es un nodo de software."}], "id": "CVE-2025-38682", "lastModified": "2026-10-19T21:10:00.160", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-09-04T16:15:35.910", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1c24e5fc0c7096e00c202a6a3e0c342c1afb47c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ffe02f7c4e36090154646612e67d331832f92037"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-415"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: i2c: core: Fix double-free of fwnode in i2c_unregister_device()", "id": "2393163", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2393163"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-38682", "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": "2025-09-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38682\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38682\nhttps://lore.kernel.org/linux-cve-announce/2025090446-CVE-2025-38682-a90a@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-05T14:02:52.745397+00:00", "updated": "2025-09-05T14:02:52.745485+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}