{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68461", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.395Z", "datePublished": "2026-08-15T05:51:21.219Z", "dateUpdated": "2026-10-16T15:53:14.716Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:39:08.142Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndevice property: initialize the remaining fields of fwnode_handle in fwnode_init()\n\nIf a firmware node is allocated on the stack (for instance: temporary\nsoftware node whose life-time we control) or on the heap - but using a\nnon-zeroing allocation function - and initialized using fwnode_init(),\nits secondary pointer will contain uninitialized memory which likely\nwill be neither NULL nor IS_ERR() and so may end up being dereferenced\n(for example: in dev_to_swnode()). Set fwnode->secondary to NULL on\ninitialization. While at it: initialize the remaining fields of struct\nfwnode_handle too just to be sure.\n\n[ Fix typo in commit message. - Danilo ]" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The flaw is in fwnode_init() in the driver-core firmware-node layer; uninitialized fwnode->secondary is consumed in dev_to_swnode() and fwnode_property_*() during local device probe, property lookups, and configfs-driven gpio-sim/gpio-virtuser software-node creation—never from a network packet or remote protocol handler.\nAC:L - Once a fwnode_handle is placed in non-zeroed stack or kmalloc storage and passed through fwnode_init(), the uninitialized secondary pointer is deterministically non-NULL and non-IS_ERR(), and property helpers immediately pass it to fwnode_call_*_op() without further validation—no race, heap grooming, or victim timing is required.\nPR:L - No init-namespace root is required to reach the dereference paths: fwnode_property_present() and dev_to_swnode() run during automatic driver probe/bind and consumer property resolution (GPIO/IIO/reset/v4l2-fwnode) that a local unprivileged user can trigger by opening device nodes or causing driver binding on embedded/Android systems using software nodes.\nUI:N - The garbage secondary pointer is dereferenced automatically inside kernel property lookups and dev_to_swnode() during probe or device registration; no separate victim action such as mounting media, clicking a prompt, or opening a malicious file is needed beyond the affected driver path executing.\nS:U - Impact is confined to kernel memory corruption and crashes within the host kernel's own security authority during firmware-node property handling; it does not cross VM, IOMMU, container, or sandbox boundaries.\nC:H - An uninitialized secondary is treated as a live fwnode_handle pointer; fwnode_call_bool_op()/fwnode_call_int_op() evaluate fwnode->ops on attacker-influenced stack or slab residue, reading kernel memory through misinterpreted ops tables rather than a bounded disclosure.\nI:H - The same garbage secondary is passed into fwnode_call_*_op() and set_secondary_fwnode()/fwnode_is_primary() logic; a non-NULL, non-ERR value with plausible ops and list-head residue enables indirect calls and list manipulation—control-flow-relevant memory corruption per CNA guidance for uninitialized pointer use in fwnode plumbing.\nA:H - Dereferencing an uninitialized secondary in dev_to_swnode() or fwnode_property_*() causes an immediate kernel oops/panic from a bad pointer or invalid ops dispatch; the fault is repeatable whenever the affected fwnode initialization path is exercised." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/linux/fwnode.h" ], "versions": [ { "version": "01bb86b380a306bd937c96da36f66429f3362137", "lessThan": "0198d579948322cda5178b9672d448375a32f947", "status": "affected", "versionType": "git" }, { "version": "01bb86b380a306bd937c96da36f66429f3362137", "lessThan": "173b61c9276c7b3a5fbcc63ae7aafc897fee1e18", "status": "affected", "versionType": "git" }, { "version": "01bb86b380a306bd937c96da36f66429f3362137", "lessThan": "f0b4e1cc8ad76baf49d898727eb52e91a4ef0544", "status": "affected", "versionType": "git" }, { "version": "01bb86b380a306bd937c96da36f66429f3362137", "lessThan": "c8542b68ba6ef4f61072098893a3f5b71c569b6c", "status": "affected", "versionType": "git" }, { "version": "01bb86b380a306bd937c96da36f66429f3362137", "lessThan": "9c86a1f930bb2ddb85f867b4736716e82a4a4683", "status": "affected", "versionType": "git" }, { "version": "01bb86b380a306bd937c96da36f66429f3362137", "lessThan": "c81e2af41de6a159837c7129a4fc444ac6e48046", "status": "affected", "versionType": "git" }, { "version": "01bb86b380a306bd937c96da36f66429f3362137", "lessThan": "7eba000621fff223dd7bab484d48918c7c77a307", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/linux/fwnode.h" ], "versions": [ { "version": "5.11", "status": "affected" }, { "version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "5.11", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.12.96" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.18.39" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0198d579948322cda5178b9672d448375a32f947" }, { "url": "https://git.kernel.org/stable/c/173b61c9276c7b3a5fbcc63ae7aafc897fee1e18" }, { "url": "https://git.kernel.org/stable/c/f0b4e1cc8ad76baf49d898727eb52e91a4ef0544" }, { "url": "https://git.kernel.org/stable/c/c8542b68ba6ef4f61072098893a3f5b71c569b6c" }, { "url": "https://git.kernel.org/stable/c/9c86a1f930bb2ddb85f867b4736716e82a4a4683" }, { "url": "https://git.kernel.org/stable/c/c81e2af41de6a159837c7129a4fc444ac6e48046" }, { "url": "https://git.kernel.org/stable/c/7eba000621fff223dd7bab484d48918c7c77a307" } ], "title": "device property: initialize the remaining fields of fwnode_handle in fwnode_init()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-68461", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-16T15:49:26.630961Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:53:14.716Z" } } ] } }