Bug 2401465 (CVE-2023-53555)

Summary: CVE-2023-53555 kernel: mm/damon/core: initialize damo_filter->list from damos_new_filter()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-10-04 16:01:52 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mm/damon/core: initialize damo_filter->list from damos_new_filter()

damos_new_filter() is not initializing the list field of newly allocated
filter object.  However, DAMON sysfs interface and DAMON_RECLAIM are not
initializing it after calling damos_new_filter().  As a result, accessing
uninitialized memory is possible.  Actually, adding multiple DAMOS filters
via DAMON sysfs interface caused NULL pointer dereferencing.  Initialize
the field just after the allocation from damos_new_filter().
Comment 1 Alexander B 2025-10-06 17:11:50 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100448-CVE-2023-53555-b949@gregkh/T