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_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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/059ac6252a63edf1cea79bf30bd860a8c264b62c	Patch
https://git.kernel.org/stable/c/22dc0d042f02ce82aa61422ea5f232628bfd9e9c	Patch
https://git.kernel.org/stable/c/6c25bf4e44a2b6a14332f952bba0974521f5b72d	Patch
https://git.kernel.org/stable/c/802e113cf120df7208e4c7e604950a85e87120a8	Patch
https://git.kernel.org/stable/c/a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a	Patch
https://git.kernel.org/stable/c/bc3dd82a0ffd488bb902f4c69c3d28fd4088d973	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2026-07-24 16:16

Updated : 2026-08-17 19:25

NVD link : CVE-2026-64244

Mitre link : CVE-2026-64244

CVE.ORG link : CVE-2026-64244

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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