NetSight
IP …
medium5.5

CVE-2026-64244

In the Linux kernel, the following vulnerability has been resolved: drivers/base/memory: set mem->altmap after successful device registration If __add_memory_b…

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 6.6 before 6.6.144
from 6.7 before 6.12.95
from 6.13 before 6.18.37
from 6.19 before 7.0.14
from 7.1 before 7.1.2

References