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CVE-2026-64182: Linux Kernel Memory Leak in Memory Block Management

CVE-2026-64182 CVE-2026-64182
Summary

The Linux kernel has a memory leak in its memory block management system, which can cause the system to run low on memory over time. This is a critical issue for systems that rely heavily on memory, such as servers and databases. To fix this issue, update your Linux kernel to the latest version.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software
VendorProductAffected versions
linux linux < 686b4283f82cd630fafd7ca9b03dfc080b3ec8fa
6.2
Original title
In the Linux kernel, the following vulnerability has been resolved: drivers/base/memory: fix memory block reference leak in poison accounting memblk_nr_poison_inc() and memblk_nr_poison_sub() loo...
Original description
In the Linux kernel, the following vulnerability has been resolved:

drivers/base/memory: fix memory block reference leak in poison accounting

memblk_nr_poison_inc() and memblk_nr_poison_sub() look up a memory block
via find_memory_block_by_id(), which acquires a reference to the memory
block device.

Both helpers use the returned memory block without dropping that
reference, leaking the device reference on each successful lookup. Drop
the reference after updating nr_hwpoison.
Published: 19 Jul 2026 · Updated: 19 Jul 2026 · First seen: 19 Jul 2026