Medium [CVE-2026-89744] Linux kernel: Denial of Service due to infinite loop in device property handling
This medium-severity Red Hat Linux advisory covers CVE-2026-89744.
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Summary
A flaw was found in the Linux kernel's device property handling. When the kernel iterates over child nodes of a firmware node (fwnode) that also has a secondary fwnode, the `fwnode_get_next_child_node()` function can enter an endless loop.
This occurs if the secondary fwnode has multiple children, causing the primary fwnode to incorrectly return an already processed child instead of indicating no further children. This vulnerability can lead to a Denial of Service (DoS), making the system unresponsive.
Red Hat severity: Moderate — CVSS 4.4 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-835.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 16 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 16 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 16 minutes ago·verify at source
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