Bug 2418838 (CVE-2025-40227)

Summary: CVE-2025-40227 kernel: mm/damon/sysfs: dealloc commit test ctx always
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-12-04 16:03:31 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mm/damon/sysfs: dealloc commit test ctx always

The damon_ctx for testing online DAMON parameters commit inputs is
deallocated only when the test fails.  This means memory is leaked for
every successful online DAMON parameters commit.  Fix the leak by always
deallocating it.
Comment 1 Alexander B 2025-12-05 15:08:27 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120459-CVE-2025-40227-33a7@gregkh/T