GHSA-WGWQ-6FX3-368G
Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-27 06:30In 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
{
"affected": [],
"aliases": [
"CVE-2026-64420"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-25T10:17:25Z",
"severity": "HIGH"
},
"details": "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",
"id": "GHSA-wgwq-6fx3-368g",
"modified": "2026-07-27T06:30:36Z",
"published": "2026-07-25T12:31:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64420"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/24522713034d521ea4b5f5f36342e2b2f7e73bd6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/257203d83204b192d1265a916b42ca0d499bb117"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/729ae27dc2503a7c1f92da1859efb45da03e4fa0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8b2c1d41bc36c100b38ce5ee6def246c527eaf8a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ed2941e5db016a0c600b25f1972620e6e223d9fa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f7e81dc181d9fe8ab977158042cd193e8cc12091"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fc030c5b116f668d4ca86dca63742ddbc98d1665"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.