Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: mm/memory_hotplug: fix memory block reference leak on remove Patch series "mm: Fix memory block leaks and locking", v2. This series fixes two memory block device reference leaks and one locking issue around the per-memory_block hwpoison counter. This patch (of 2): remove_memory_blocks_and_altmaps() looks up each memory block with find_memory_block(), which acquires a reference to the memory block device. That reference is never dropped on this path, resulting in a leaked device reference when removing memory blocks and their altmaps. Drop the reference after retrieving mem->altmap and clearing mem->altmap, before removing the memory block device.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 6b8f0798b85aa529011570369db985a788f3003f before b8ab30c79fc00147125b9c39f928561d9dd13d06; affected 6b8f0798b85aa529011570369db985a788f3003f before 09ce923071e7852ece60d7368e05249bf32c7967; affected 6b8f0798b85aa529011570369db985a788f3003f before df64c0d21c3f85f844b2f656333e43d97e6ffa74; affected 6b8f0798b85aa529011570369db985a788f3003f before 93866f55f7e292fe3d47d36c9efe5ee10213a06b |
| Linux / Linux | affected 6.8; unaffected 0 before 6.8; unaffected 6.12.92 through 6.12.*; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.