CVE-2026-64420 (GCVE-0-2026-64420)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50
VLAI
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
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
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)
Create a notification for this product.
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-rc1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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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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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/8b2c1d41bc36c100b38ce5ee6def246c527eaf8a"
        }
      ],
      "title": "mfd: cros_ec: Delay dev_set_drvdata() until probe success",
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    "datePublished": "2026-07-25T08:50:59.115Z",
    "dateReserved": "2026-07-19T15:36:31.786Z",
    "dateUpdated": "2026-07-25T08:50:59.115Z",
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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  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    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T15:59:41Z",
      "cve": "CVE-2026-64420",
      "id": "CVE-2026-64420",
      "initial_release_date": "2026-07-25T15:59:41Z",
      "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": "2"
    }
  }
}



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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

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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.