mfd: cros_ec: Delay dev_set_drvdata() until probe success

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64420
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:25 UTC
Updated2026-07-27 05:16:48 UTC
DescriptionIn 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

Risk And Classification

Primary CVSS: v3.1 7 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001180000 probability, percentile 0.020140000 (date 2026-07-28)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b 24522713034d521ea4b5f5f36342e2b2f7e73bd6 git Not specified
CNA Linux Linux affected 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b f7e81dc181d9fe8ab977158042cd193e8cc12091 git Not specified
CNA Linux Linux affected 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b 257203d83204b192d1265a916b42ca0d499bb117 git Not specified
CNA Linux Linux affected 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b 729ae27dc2503a7c1f92da1859efb45da03e4fa0 git Not specified
CNA Linux Linux affected 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b ed2941e5db016a0c600b25f1972620e6e223d9fa git Not specified
CNA Linux Linux affected 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d git Not specified
CNA Linux Linux affected 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b fc030c5b116f668d4ca86dca63742ddbc98d1665 git Not specified
CNA Linux Linux affected 1c1d152cc5ac3a67d199728a9ba0b4f54a498f8b 8b2c1d41bc36c100b38ce5ee6def246c527eaf8a git Not specified
CNA Linux Linux affected 4.12 Not specified
CNA Linux Linux unaffected 4.12 semver Not specified
CNA Linux Linux unaffected 5.10.261 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.96 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.39 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/fc030c5b116f668d4ca86dca63742ddbc98d1665 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/729ae27dc2503a7c1f92da1859efb45da03e4fa0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/24522713034d521ea4b5f5f36342e2b2f7e73bd6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8b2c1d41bc36c100b38ce5ee6def246c527eaf8a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ed2941e5db016a0c600b25f1972620e6e223d9fa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f7e81dc181d9fe8ab977158042cd193e8cc12091 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/257203d83204b192d1265a916b42ca0d499bb117 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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