CVE-2026-64420 (GCVE-0-2026-64420)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-08-17 04:55
VLAI
EPSS
VEX
Title
mfd: cros_ec: Delay dev_set_drvdata() until probe success
Summary
In the Linux kernel, the following vulnerability has been resolved:
mfd: cros_ec: Delay dev_set_drvdata() until probe success
If ec_device_probe() fails, cros_ec_class_release releases memory for the
cros_ec_dev structure. However, because the drvdata was already set,
sub-drivers like cros_ec_typec can still retrieve the stale pointer via the
platform device. This leads to a use-after-free when cros_ec_typec attempts
to access &typec->ec->ec->dev on a device that has already been released.
Move dev_set_drvdata() to ensure that the pointer is only made available
once all initialization steps have succeeded.
sysfs: cannot create duplicate filename '/class/chromeos/cros_ec'
Call trace:
sysfs_do_create_link_sd+0x94/0xdc
sysfs_create_link+0x30/0x44
device_add_class_symlinks+0x90/0x13c
device_add+0xf0/0x50c
ec_device_probe+0x150/0x4f0
platform_probe+0xa0/0xe0
...
BUG: KASAN: invalid-access in __memcpy+0x44/0x230
Write at addr f5ffff809e2d33ac by task kworker/u32:5/125
Pointer tag: [f5], memory tag: [fe]
Tainted : [W]=WARN, [O]=OOT_MODULE
Hardware name: Google Navi unprovisioned 0x7FFFFFFF/sku0 board/sku3
Workqueue: events_unbound deferred_probe_work_func
Call trace:
__memcpy+0x44/0x230
cros_ec_check_features+0x60/0xcc [cros_ec_proto]
cros_typec_probe+0xe8/0x6e0 [cros_ec_typec]
platform_probe+0xa0/0xe0
Severity
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b , < 24522713034d521ea4b5f5f36342e2b2f7e73bd6
(git)
Affected: 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b , < f7e81dc181d9fe8ab977158042cd193e8cc12091 (git) Affected: 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b , < 257203d83204b192d1265a916b42ca0d499bb117 (git) Affected: 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b , < 729ae27dc2503a7c1f92da1859efb45da03e4fa0 (git) Affected: 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b , < ed2941e5db016a0c600b25f1972620e6e223d9fa (git) Affected: 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b , < b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d (git) Affected: 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b , < fc030c5b116f668d4ca86dca63742ddbc98d1665 (git) Affected: 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b , < 8b2c1d41bc36c100b38ce5ee6def246c527eaf8a (git) |
guessed | |
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (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: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmfd: cros_ec: Delay dev_set_drvdata() until probe success\n\nIf ec_device_probe() fails, cros_ec_class_release releases memory for the\ncros_ec_dev structure. However, because the drvdata was already set,\nsub-drivers like cros_ec_typec can still retrieve the stale pointer via the\nplatform device. This leads to a use-after-free when cros_ec_typec attempts\nto access \u0026typec-\u003eec-\u003eec-\u003edev on a device that has already been released.\nMove dev_set_drvdata() to ensure that the pointer is only made available\nonce all initialization steps have succeeded.\n\n sysfs: cannot create duplicate filename \u0027/class/chromeos/cros_ec\u0027\n Call trace:\n sysfs_do_create_link_sd+0x94/0xdc\n sysfs_create_link+0x30/0x44\n device_add_class_symlinks+0x90/0x13c\n device_add+0xf0/0x50c\n ec_device_probe+0x150/0x4f0\n platform_probe+0xa0/0xe0\n ...\n BUG: KASAN: invalid-access in __memcpy+0x44/0x230\n Write at addr f5ffff809e2d33ac by task kworker/u32:5/125\n Pointer tag: [f5], memory tag: [fe]\n Tainted : [W]=WARN, [O]=OOT_MODULE\n Hardware name: Google Navi unprovisioned 0x7FFFFFFF/sku0 board/sku3\n Workqueue: events_unbound deferred_probe_work_func\n Call trace:\n __memcpy+0x44/0x230\n cros_ec_check_features+0x60/0xcc [cros_ec_proto]\n cros_typec_probe+0xe8/0x6e0 [cros_ec_typec]\n platform_probe+0xa0/0xe0"
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}
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmfd: cros_ec: Delay dev_set_drvdata() until probe success\n\nIf ec_device_probe() fails, cros_ec_class_release releases memory for the\ncros_ec_dev structure. However, because the drvdata was already set,\nsub-drivers like cros_ec_typec can still retrieve the stale pointer via the\nplatform device. This leads to a use-after-free when cros_ec_typec attempts\nto access \u0026typec-\u003eec-\u003eec-\u003edev on a device that has already been released.\nMove dev_set_drvdata() to ensure that the pointer is only made available\nonce all initialization steps have succeeded.\n\n sysfs: cannot create duplicate filename \u0027/class/chromeos/cros_ec\u0027\n Call trace:\n sysfs_do_create_link_sd+0x94/0xdc\n sysfs_create_link+0x30/0x44\n device_add_class_symlinks+0x90/0x13c\n device_add+0xf0/0x50c\n ec_device_probe+0x150/0x4f0\n platform_probe+0xa0/0xe0\n ...\n BUG: KASAN: invalid-access in __memcpy+0x44/0x230\n Write at addr f5ffff809e2d33ac by task kworker/u32:5/125\n Pointer tag: [f5], memory tag: [fe]\n Tainted : [W]=WARN, [O]=OOT_MODULE\n Hardware name: Google Navi unprovisioned 0x7FFFFFFF/sku0 board/sku3\n Workqueue: events_unbound deferred_probe_work_func\n Call trace:\n __memcpy+0x44/0x230\n cros_ec_check_features+0x60/0xcc [cros_ec_proto]\n cros_typec_probe+0xe8/0x6e0 [cros_ec_typec]\n platform_probe+0xa0/0xe0"
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"id": "CVE-2026-64420",
"lastModified": "2026-09-04T15:16:48.390",
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"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.0,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2026-07-25T10:17:25.963",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/24522713034d521ea4b5f5f36342e2b2f7e73bd6"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/257203d83204b192d1265a916b42ca0d499bb117"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/729ae27dc2503a7c1f92da1859efb45da03e4fa0"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/8b2c1d41bc36c100b38ce5ee6def246c527eaf8a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/ed2941e5db016a0c600b25f1972620e6e223d9fa"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/f7e81dc181d9fe8ab977158042cd193e8cc12091"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/fc030c5b116f668d4ca86dca63742ddbc98d1665"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-07-29T14:52:59+00:00",
"cve": "CVE-2026-64420",
"id": "CVE-2026-64420",
"initial_release_date": "2026-07-25T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: mfd: cros_ec: Delay dev_set_drvdata() until probe success",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64420.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-22T16:53:55Z",
"cve": "CVE-2026-64420",
"id": "CVE-2026-64420",
"initial_release_date": "2026-07-25T15:59:41Z",
"product_status:first_fixed": "60",
"product_status:known_affected": "669",
"product_status:known_not_affected": "64",
"product_status:recommended": "111",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64420",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64420.json",
"version": "13"
}
}
}
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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.
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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.
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