CVE-2026-64420 Details
Description
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
A use-after-free vulnerability has been identified in the Linux kernel's handling of Chrome OS Embedded Controller (Cros EC) devices. This issue arises in the Cros EC Type-C sub-driver, which can access a pointer to a platform device that has already been released, leading to potential memory corruption. The vulnerability is present in the stable version of the Linux kernel.
The vulnerability has been addressed by modifying the Cros EC device probe function to delay setting the driver data until after the probe has successfully completed. This change prevents sub-drivers from accessing stale pointers to released devices.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/24522713034d521ea4b5f5f36342e2b2f7e73bd6 | kernel.org | Patch |
| https://git.kernel.org/stable/c/257203d83204b192d1265a916b42ca0d499bb117 | kernel.org | Patch |
| https://git.kernel.org/stable/c/729ae27dc2503a7c1f92da1859efb45da03e4fa0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/8b2c1d41bc36c100b38ce5ee6def246c527eaf8a | kernel.org | Patch |
| https://git.kernel.org/stable/c/b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d | kernel.org | Patch |
| https://git.kernel.org/stable/c/ed2941e5db016a0c600b25f1972620e6e223d9fa | kernel.org | Patch |
| https://git.kernel.org/stable/c/f7e81dc181d9fe8ab977158042cd193e8cc12091 | kernel.org | Patch |
| https://git.kernel.org/stable/c/fc030c5b116f668d4ca86dca63742ddbc98d1665 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.12, < 5.10.261 >= 5.11, < 5.15.212 >= 5.16, < 6.1.178 >= 6.2, < 6.6.145 >= 6.7, < 6.12.96 >= 6.13, < 6.18.39 >= 6.19, < 7.1.4 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 4, 2026 | Initial Analysis | [email protected] |
| Aug 17, 2026 | CVE Modified | kernel.org |
| Jul 27, 2026 | CVE Modified | kernel.org |
| Jul 25, 2026 | New CVE Received | kernel.org |