of: unittest: fix use-after-free in of_unittest_changeset()

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Summary

CVECVE-2026-46288
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-08 17:16:46 UTC
Updated2026-06-14 06:16:23 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: of: unittest: fix use-after-free in of_unittest_changeset() The variable 'parent' is assigned the value of 'nchangeset' earlier in the function, meaning both point to the same struct device_node. The call to of_node_put(nchangeset) can decrement the reference count to zero and free the node if there are no other holders. After that, the code still uses 'parent' to check for the presence of a property and to read a string property, leading to a use-after-free. Fix this by moving the of_node_put() call after the last access to 'parent', avoiding the UAF.

Risk And Classification

Primary CVSS: v3.1 8.4 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.000160000 probability, percentile 0.037670000 (date 2026-06-14)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.4HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.4HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1c668ea65506e67ce2eae07b69bb09fcdd86e309 37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1 git Not specified
CNA Linux Linux affected 1c668ea65506e67ce2eae07b69bb09fcdd86e309 7f0f0926f3010b10cff5e93446258f971e42f2fd git Not specified
CNA Linux Linux affected 1c668ea65506e67ce2eae07b69bb09fcdd86e309 6fdad20b7975bdc32e85b45f8f7c640f6687b81f git Not specified
CNA Linux Linux affected 1c668ea65506e67ce2eae07b69bb09fcdd86e309 faecdd423c27f0d6090156a435ba9dbbac0eaddb git Not specified
CNA Linux Linux affected 6.12 Not specified
CNA Linux Linux unaffected 6.12 semver Not specified
CNA Linux Linux unaffected 6.12.86 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/faecdd423c27f0d6090156a435ba9dbbac0eaddb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6fdad20b7975bdc32e85b45f8f7c640f6687b81f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7f0f0926f3010b10cff5e93446258f971e42f2fd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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