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CVE-2025-38405 is a memory leak vulnerability in the Linux kernel NVMe target (nvmet) subsystem. When nvmet processes commands that include metadata, it initializes inline bios with bio_init but fails to perform the corresponding bio_uninit during teardown. After the block-layer change introduced by commit bf4c89fc8797, callers using bio_init must explicitly invoke bio_uninit to release associated bio integrity allocations. Because nvmet omitted that cleanup step, the bio integrity structure associated with bio->bi_integrity remains allocated, causing a continuous leak of kernel memory from the kmalloc-128 slab or related allocations. The issue is resolved by uninitializing the inline bio so integrity-related memory is fully deallocated.
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