CVE-2026-64180 (GCVE-0-2026-64180)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:41 – Updated: 2026-07-19 15:41
VLAI
Title
mm/memory_hotplug: fix memory block reference leak on remove
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6b8f0798b85aa529011570369db985a788f3003f , < b8ab30c79fc00147125b9c39f928561d9dd13d06 (git)
Affected: 6b8f0798b85aa529011570369db985a788f3003f , < 09ce923071e7852ece60d7368e05249bf32c7967 (git)
Affected: 6b8f0798b85aa529011570369db985a788f3003f , < df64c0d21c3f85f844b2f656333e43d97e6ffa74 (git)
Affected: 6b8f0798b85aa529011570369db985a788f3003f , < 93866f55f7e292fe3d47d36c9efe5ee10213a06b (git)
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Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.12.92 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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