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CVE-2026-23137 is a memory leak in the Linux kernel device-tree unit-test function unittest_data_add(). If of_resolve_phandles() fails, allocated unittest_data memory is not freed on the error path. Repeated triggering may exhaust memory and degrade system availability. The fix introduces scope-based cleanup through __free(kfree), with retain_and_null_ptr() transferring ownership to the device tree on successful execution.
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A Linux kernel vulnerability addressed by Debian advisory DSA-6528-1 through Trixie's Linux source package version 6.12.111-1. The article does not establish this CVE's particular attack mechanism, impact, or exploitation status.
A Linux kernel device-tree unittest memory-leak vulnerability in unittest_data_add(). When of_resolve_phandles() fails, allocated unittest_data was not freed. The resolved fix adds automatic cleanup on error paths and avoids double-freeing on the success path.
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