CVE-2026-64420
Estado: AnalizadaAlta (7)—
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.
Detalles técnicos trazas, registros y código del informe original
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
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.15%
- Percentil entre todas las CVEs puntuadas: 4
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation75 % - Impacto principal
T1059Command and Scripting Interpreterexecution65 %
Vulnerabilidad local (AV:L, PR:L) sin interacción que causa use-after-free en liberación de memoria, permitiendo ejecución de código mediante acceso a punteros stale; el kernel Linux requiere escalada de privilegios local.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-476
Referencias
- https://git.kernel.org/stable/c/24522713034d521ea4b5f5f36342e2b2f7e73bd6
- https://git.kernel.org/stable/c/257203d83204b192d1265a916b42ca0d499bb117
- https://git.kernel.org/stable/c/729ae27dc2503a7c1f92da1859efb45da03e4fa0
- https://git.kernel.org/stable/c/8b2c1d41bc36c100b38ce5ee6def246c527eaf8a
- https://git.kernel.org/stable/c/b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d
- https://git.kernel.org/stable/c/ed2941e5db016a0c600b25f1972620e6e223d9fa
- https://git.kernel.org/stable/c/f7e81dc181d9fe8ab977158042cd193e8cc12091
- https://git.kernel.org/stable/c/fc030c5b116f668d4ca86dca63742ddbc98d1665
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-64420",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b",
"lessThan": "24522713034d521ea4b5f5f36342e2b2f7e73bd6",
"versionType": "git"
},
{
"status": "affected",
"version": "1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b",
"lessThan": "f7e81dc181d9fe8ab977158042cd193e8cc12091",
"versionType": "git"
},
{
"status": "affected",
"version": "1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b",
"lessThan": "257203d83204b192d1265a916b42ca0d499bb117",
"versionType": "git"
},
{
"status": "affected",
"version": "1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b",
"lessThan": "729ae27dc2503a7c1f92da1859efb45da03e4fa0",
"versionType": "git"
},
{
"status": "affected",
"version": "1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b",
"lessThan": "ed2941e5db016a0c600b25f1972620e6e223d9fa",
"versionType": "git"
},
{
"status": "affected",
"version": "1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b",
"lessThan": "b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d",
"versionType": "git"
},
{
"status": "affected",
"version": "1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b",
"lessThan": "fc030c5b116f668d4ca86dca63742ddbc98d1665",
"versionType": "git"
},
{
"status": "affected",
"version": "1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b",
"lessThan": "8b2c1d41bc36c100b38ce5ee6def246c527eaf8a",
"versionType": "git"
}
],
"programFiles": [
"drivers/mfd/cros_ec_dev.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/mfd/cros_ec_dev.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-07-25T10:17:25.963",
"references": [
{
"url": "https://git.kernel.org/stable/c/24522713034d521ea4b5f5f36342e2b2f7e73bd6",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/257203d83204b192d1265a916b42ca0d499bb117",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/729ae27dc2503a7c1f92da1859efb45da03e4fa0",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8b2c1d41bc36c100b38ce5ee6def246c527eaf8a",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ed2941e5db016a0c600b25f1972620e6e223d9fa",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f7e81dc181d9fe8ab977158042cd193e8cc12091",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fc030c5b116f668d4ca86dca63742ddbc98d1665",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-476"
}
]
}
],
"descriptions": [
{
"lang": "en",
"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 &typec->ec->ec->dev 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 '/class/chromeos/cros_ec'\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"
}
],
"lastModified": "2026-09-04T15:16:48.390",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DE5A9A76-6531-4A35-9E92-9AAD00D98589",
"versionEndExcluding": "5.10.261",
"versionStartIncluding": "4.12"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8E99FB01-CD93-41AF-A653-3F450652B9A6",
"versionEndExcluding": "5.15.212",
"versionStartIncluding": "5.11"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "092233C7-F4E0-40C8-BD4D-A28FE50DFE20",
"versionEndExcluding": "6.1.178",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7046B092-F810-4440-ACE6-60218518EECE",
"versionEndExcluding": "6.6.145",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "38A8100E-2B1A-462F-AEE9-8901B870FEF2",
"versionEndExcluding": "6.12.96",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "914AE4BC-3D59-4C5A-9DB5-9CE327B429F7",
"versionEndExcluding": "6.18.39",
"versionStartIncluding": "6.13"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6228DDD6-4557-4AA3-9F43-AB995D471E42",
"versionEndExcluding": "7.1.4",
"versionStartIncluding": "6.19"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}