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CVE-2026-64244

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.

Metadata

CVE ID
CVE-2026-64244
State
PUBLISHED
Assigner
Linux
Reserved
2026-07-19 15:36 UTC
Published
2026-07-24 15:29 UTC
Last updated
2026-07-24 15:29 UTC
Vendor / Product
Linux / Linux
Sources
cve.org  ·  NVD

Severity & Metrics

No CVSS data available.

Affected products (2)
VendorProductPlatformVersions
Linux Linux 1a8c64e110435e44e71bcd50a75663174b575f22 < 802e113cf120df7208e4c7e604950a85e87120a8, 1a8c64e110435e44e71bcd50a75663174b575f22 < 22dc0d042f02ce82aa61422ea5f232628bfd9e9c, 1a8c64e110435e44e71bcd50a75663174b575f22 < 6c25bf4e44a2b6a14332f952bba0974521f5b72d, 1a8c64e110435e44e71bcd50a75663174b575f22 < bc3dd82a0ffd488bb902f4c69c3d28fd4088d973 …
Linux Linux 6.6, 0 < 6.6, 6.6.144 ≤ 6.6.*, 6.12.95 ≤ 6.12.* …
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