Memory Reference Leak in Linux Kernel Drivers Base

CVE-2026-64182

What is CVE-2026-64182?

An issue has been identified in the Linux kernel where a memory reference leak occurs in the drivers base during poison accounting. The functions memblk_nr_poison_inc() and memblk_nr_poison_sub() lookup a memory block using find_memory_block_by_id(), which improperly retains a reference to the device without releasing it. This oversight may lead to a gradual increase in resource consumption due to a leaked reference on each successful lookup. A fix has been implemented to ensure that the reference to the memory block is dropped after the necessary updates, thus optimizing memory management.

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