CVE-2026-68461 (GCVE-0-2026-68461)
Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-10-19 21:09
VLAI
EPSS
VEX
Title
device property: initialize the remaining fields of fwnode_handle in fwnode_init()
Summary
In the Linux kernel, the following vulnerability has been resolved:
device property: initialize the remaining fields of fwnode_handle in fwnode_init()
If a firmware node is allocated on the stack (for instance: temporary
software node whose life-time we control) or on the heap - but using a
non-zeroing allocation function - and initialized using fwnode_init(),
its secondary pointer will contain uninitialized memory which likely
will be neither NULL nor IS_ERR() and so may end up being dereferenced
(for example: in dev_to_swnode()). Set fwnode->secondary to NULL on
initialization. While at it: initialize the remaining fields of struct
fwnode_handle too just to be sure.
[ Fix typo in commit message. - Danilo ]
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:49 UTC
CWE
- CWE-665 - Improper Initialization
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
01bb86b380a306bd937c96da36f66429f3362137 , < 0198d579948322cda5178b9672d448375a32f947
(git)
Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < 173b61c9276c7b3a5fbcc63ae7aafc897fee1e18 (git) Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < f0b4e1cc8ad76baf49d898727eb52e91a4ef0544 (git) Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < c8542b68ba6ef4f61072098893a3f5b71c569b6c (git) Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < 9c86a1f930bb2ddb85f867b4736716e82a4a4683 (git) Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < c81e2af41de6a159837c7129a4fc444ac6e48046 (git) Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < 7eba000621fff223dd7bab484d48918c7c77a307 (git) |
guessed | |
| Linux | Linux |
Affected:
5.11
Unaffected: 0 , < 5.11 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
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"product": "Linux",
"programFiles": [
"include/linux/fwnode.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "0198d579948322cda5178b9672d448375a32f947",
"status": "affected",
"version": "01bb86b380a306bd937c96da36f66429f3362137",
"versionType": "git"
},
{
"lessThan": "173b61c9276c7b3a5fbcc63ae7aafc897fee1e18",
"status": "affected",
"version": "01bb86b380a306bd937c96da36f66429f3362137",
"versionType": "git"
},
{
"lessThan": "f0b4e1cc8ad76baf49d898727eb52e91a4ef0544",
"status": "affected",
"version": "01bb86b380a306bd937c96da36f66429f3362137",
"versionType": "git"
},
{
"lessThan": "c8542b68ba6ef4f61072098893a3f5b71c569b6c",
"status": "affected",
"version": "01bb86b380a306bd937c96da36f66429f3362137",
"versionType": "git"
},
{
"lessThan": "9c86a1f930bb2ddb85f867b4736716e82a4a4683",
"status": "affected",
"version": "01bb86b380a306bd937c96da36f66429f3362137",
"versionType": "git"
},
{
"lessThan": "c81e2af41de6a159837c7129a4fc444ac6e48046",
"status": "affected",
"version": "01bb86b380a306bd937c96da36f66429f3362137",
"versionType": "git"
},
{
"lessThan": "7eba000621fff223dd7bab484d48918c7c77a307",
"status": "affected",
"version": "01bb86b380a306bd937c96da36f66429f3362137",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"include/linux/fwnode.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.11"
},
{
"lessThan": "5.11",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.212",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.178",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.145",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.96",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.39",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.5",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "5.11",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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-\u003esecondary 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": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The flaw is in fwnode_init() in the driver-core firmware-node layer; uninitialized fwnode-\u003esecondary 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\u2014never 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\u2014no 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\u0027s 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-\u003eops 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\u2014control-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."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:39:08.142Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"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"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68461",
"datePublished": "2026-08-15T05:51:21.219Z",
"dateReserved": "2026-07-30T09:28:09.395Z",
"dateUpdated": "2026-10-19T21:09:11.556Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.