CVE-2026-64180
mm/memory_hotplug: fix memory block reference leak on remove
Description
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.
INFO
Published Date :
July 19, 2026, 4:18 p.m.
Last Modified :
July 19, 2026, 4:18 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64180
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Apply the patch series 'mm: Fix memory block leaks and locking', v2.
- Drop the device reference after retrieving mem->altmap.
- Clear mem->altmap before removing the memory block device.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64180.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64180 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64180
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64180 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64180 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6b8f0798b85aa529011570369db985a788f3003f', 'lessThan': 'b8ab30c79fc00147125b9c39f928561d9dd13d06', 'versionType': 'git'}, {'status': 'affected', 'version': '6b8f0798b85aa529011570369db985a788f3003f', 'lessThan': '09ce923071e7852ece60d7368e05249bf32c7967', 'versionType': 'git'}, {'status': 'affected', 'version': '6b8f0798b85aa529011570369db985a788f3003f', 'lessThan': 'df64c0d21c3f85f844b2f656333e43d97e6ffa74', 'versionType': 'git'}, {'status': 'affected', 'version': '6b8f0798b85aa529011570369db985a788f3003f', 'lessThan': '93866f55f7e292fe3d47d36c9efe5ee10213a06b', 'versionType': 'git'}], 'programFiles': ['mm/memory_hotplug.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.92', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['mm/memory_hotplug.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/09ce923071e7852ece60d7368e05249bf32c7967 Added Reference https://git.kernel.org/stable/c/93866f55f7e292fe3d47d36c9efe5ee10213a06b Added Reference https://git.kernel.org/stable/c/b8ab30c79fc00147125b9c39f928561d9dd13d06 Added Reference https://git.kernel.org/stable/c/df64c0d21c3f85f844b2f656333e43d97e6ffa74