device property: fix infinite loop in fwnode_for_each_child_node()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89744
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:20:05 UTC
Updated2026-09-14 13:19:23 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: device property: fix infinite loop in fwnode_for_each_child_node() When iterate over children of a fwnode that has a secondary fwnode, fwnode_get_next_child_node() can enter an infinite loop if the secondary fwnode has more than one child. Parent Child (Primary fwnode) FWa: {FWa1, FWa2, FWa3} (Secondary fwnode) FWb: {FWb1, FWb2} In this case: ┌─> fwnode_get_next_child_node(FWa, FWa1) │ - fwnode_call_ptr_op(FWa, get_next_child_node, FWa1) returns FWa2 │ │ ... │ │ fwnode_get_next_child_node(FWa, FWa3) │ - fwnode_call_ptr_op(FWa, get_next_child_node, FWa3) returns NULL │ - fwnode_call_ptr_op(FWb, get_next_child_node, FWa3) returns FWb1 │ │ fwnode_get_next_child_node(FWa, FWb1) │ - fwnode_call_ptr_op(FWa, get_next_child_node, FWb1) returns FWa1 └────┘ This cause fwnode_for_each_child_node() to loop indefinitely, reapeatedly output {FWa1, FWa2, FWa3, FWb1, FWa1, ...}. The root cause is that when the current child (FWb1) belongs to the secondary fwnode, calling get_next_child_node() on the parimary fwnode incorrectly returns the first child (FWa1) again instead of NULL. Fix this by dynamically checking the parent fwnode of the current child before calling get_next_child_node(). This approach follows the pattern established in commit b5b41ab6b0c1 ("device property: Check fwnode->secondary in fwnode_graph_get_next_endpoint()").

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: 0.001440000 probability, percentile 0.039790000 (date 2026-09-13)

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 272fcf19fda14ec603ce915aafc56cb3ea2fb38d 04004fa33730031392d987a9c1bbd8a0e1c4794b git Not specified
CNA Linux Linux affected 3cfdf8d27b668d122a67a14bf2bcde1a7f10bbd6 f4ae79b5f00130aacaddb1f3eb2e5ef711fbf9e0 git Not specified
CNA Linux Linux affected 64dc258f9eec1d7204e9879cb836fe29967f1239 20ed517e416df89448029293304c9e180c26cd4b git Not specified
CNA Linux Linux affected 32752c3e81498b106da64a141379eb94f493fe6f ba69d892ff4e4a58cc12a2cae106b112db3306cc git Not specified
CNA Linux Linux affected 2692c614f8f05929d692b3dbfd3faef1f00fbaf0 9cb6b223ef02cb5c9777a852ae1ecf5796987eb6 git Not specified
CNA Linux Linux affected 2692c614f8f05929d692b3dbfd3faef1f00fbaf0 1900692555826753adab8799a1a8d50bb1ee200c git Not specified
CNA Linux Linux affected d1370a4f2aa0d811d419f6a6c6d257867d608956 git Not specified
CNA Linux Linux affected 5b51b2ba5207e07bcd7be0daab2f8eea405e005e git Not specified
CNA Linux Linux affected 43a621684ffa47fc008be98b15ff7becaf3a72fa git Not specified
CNA Linux Linux affected 6.1.167 6.1.188 semver Not specified
CNA Linux Linux affected 6.6.130 6.6.157 semver Not specified
CNA Linux Linux affected 6.12.78 6.12.109 semver Not specified
CNA Linux Linux affected 6.18.19 6.18.50 semver Not specified
CNA Linux Linux affected 5.10.253 5.11 semver Not specified
CNA Linux Linux affected 5.15.203 5.16 semver Not specified
CNA Linux Linux affected 6.19.9 6.20 semver Not specified
CNA Linux Linux affected 7.0 Not specified
CNA Linux Linux unaffected 7.0 semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.109 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/04004fa33730031392d987a9c1bbd8a0e1c4794b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/20ed517e416df89448029293304c9e180c26cd4b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9cb6b223ef02cb5c9777a852ae1ecf5796987eb6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1900692555826753adab8799a1a8d50bb1ee200c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ba69d892ff4e4a58cc12a2cae106b112db3306cc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f4ae79b5f00130aacaddb1f3eb2e5ef711fbf9e0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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