VULNERABILITY INTELLIGENCE
CVE-2026-64244
CVSS score5.5 MEDIUM
EPSS probability0.11%
CISA KEVNot currently listed
Published2026-07-24
Last modified2026-08-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Description
In the Linux kernel, the following vulnerability has been resolved: drivers/base/memory: set mem->altmap after successful device registration If __add_memory_block() fails at xa_store() (under memory pressure for example), device_unregister() is called, which eventually triggers memory_block_release() with mem->altmap still set, causing a WARN_ON(mem->altmap). This was triggered by modifying virtio-mem driver. Fix this by delaying the assignment of mem->altmap until after __add_memory_block() has succeeded.
Weakness classification
- nvd@nist.gov: NVD-CWE-noinfo