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CVE PROGRAM SOURCE RECORD7.0 High

CVE-2026-64420

mfd: cros_ec: Delay dev_set_drvdata() until probe success

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Status
Published
Published
Updated
Assigning organization
Linux

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b to < 24522713034d521ea4b5f5f36342e2b2f7e73bd6affected
  • 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b to < f7e81dc181d9fe8ab977158042cd193e8cc12091affected
  • 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b to < 257203d83204b192d1265a916b42ca0d499bb117affected
  • 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b to < 729ae27dc2503a7c1f92da1859efb45da03e4fa0affected
  • 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b to < ed2941e5db016a0c600b25f1972620e6e223d9faaffected
  • 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b to < b5f41d5bf08e7b1b14fa0bd640975e6d78dc006daffected
  • 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b to < fc030c5b116f668d4ca86dca63742ddbc98d1665affected
  • 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b to < 8b2c1d41bc36c100b38ce5ee6def246c527eaf8aaffected

Linux Linux

Default version status: affected

  • 4.12affected
  • 0 to < 4.12unaffected
  • 5.10.261 to ≤ 5.10.*unaffected
  • 5.15.212 to ≤ 5.15.*unaffected
  • 6.1.178 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.96 to ≤ 6.12.*unaffected
  • 6.18.39 to ≤ 6.18.*unaffected
  • 7.1.4 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References