{"cve":"CVE-2026-89744","nvd":{"published":"2026-09-11T20:20:05.113","modified":"2026-10-19T09:18:17.280","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndevice property: fix infinite loop in fwnode_for_each_child_node()\n\nWhen iterate over children of a fwnode that has a secondary fwnode,\nfwnode_get_next_child_node() can enter an infinite loop if the secondary\nfwnode has more than one child.\n\n                       Parent        Child\n      (Primary fwnode)   FWa:   {FWa1, FWa2, FWa3}\n    (Secondary fwnode)   FWb:   {FWb1, FWb2}\n\nIn this case:\n\n ┌─> fwnode_get_next_child_node(FWa, FWa1)\n │    - fwnode_call_ptr_op(FWa, get_next_child_node, FWa1) returns FWa2\n │\n │   ...\n │\n │   fwnode_get_next_child_node(FWa, FWa3)\n │    - fwnode_call_ptr_op(FWa, get_next_child_node, FWa3) returns NULL\n │    - fwnode_call_ptr_op(FWb, get_next_child_node, FWa3) returns FWb1\n │\n │   fwnode_get_next_child_node(FWa, FWb1)\n │    - fwnode_call_ptr_op(FWa, get_next_child_node, FWb1) returns FWa1\n └────┘\n\nThis cause fwnode_for_each_child_node() to loop indefinitely, reapeatedly\noutput {FWa1, FWa2, FWa3, FWb1, FWa1, ...}.\n\nThe root cause is that when the current child (FWb1) belongs to the\nsecondary fwnode, calling get_next_child_node() on the parimary fwnode\nincorrectly returns the first child (FWa1) again instead of NULL.\n\nFix this by dynamically checking the parent fwnode of the current child\nbefore calling get_next_child_node(). This approach follows the pattern\nestablished in commit b5b41ab6b0c1 (\"device property: Check\nfwnode->secondary in fwnode_graph_get_next_endpoint()\").","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.4},"cwes":[],"references":["https://git.kernel.org/stable/c/04004fa33730031392d987a9c1bbd8a0e1c4794b","https://git.kernel.org/stable/c/1900692555826753adab8799a1a8d50bb1ee200c","https://git.kernel.org/stable/c/20ed517e416df89448029293304c9e180c26cd4b","https://git.kernel.org/stable/c/9cb6b223ef02cb5c9777a852ae1ecf5796987eb6","https://git.kernel.org/stable/c/ba69d892ff4e4a58cc12a2cae106b112db3306cc"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-89744","score":0.00142,"percentile":0.03443,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}