CVE-2026-64244 - drivers/base/memory: set mem->altmap after successful device registration

CVE-2026-64244 - drivers/base/memory: set mem->altmap after successful device registration

https://cvefeed.io/rssfeed/latest.atom / Fri, 07/24/2026 - 19:07
CVE ID :CVE-2026-64244
Published : July 24, 2026, 4:16 p.m. | 34 minutes ago
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.
Severity: 0.0 | NA
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