CVE-2026-64244

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

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

08 Nov 2026, 16:10

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: drivers/base/memory: establecer mem -> altmap después del registro exitoso del dispositivo Si __add_memory_block() falla en xa_store() (bajo presión de memoria, por ejemplo), se llama a device_unregister(), lo que finalmente dispara memory_block_release() con mem -> altmap aún establecido, causando un WARN_ON(mem -> altmap). Esto fue provocado al modificar el controlador virtio-mem. Esto se soluciona retrasando la asignación de mem -> altmap hasta después de que __add_memory_block() haya tenido éxito.
Information

Published : 2026-07-24 16:16

Updated : 2026-11-08 16:10

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