CVE-2026-64244
Vulnerability 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.
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.
Vulnerability Details
Published Date
Last Modified
Source
NVD
Vendor
Linux
Product
Linux
External References
- https://git.kernel.org/stable/c/059ac6252a63edf1cea79bf30bd860a8c264b62c
- https://git.kernel.org/stable/c/22dc0d042f02ce82aa61422ea5f232628bfd9e9c
- https://git.kernel.org/stable/c/6c25bf4e44a2b6a14332f952bba0974521f5b72d
- https://git.kernel.org/stable/c/802e113cf120df7208e4c7e604950a85e87120a8
- https://git.kernel.org/stable/c/a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a
- https://git.kernel.org/stable/c/bc3dd82a0ffd488bb902f4c69c3d28fd4088d973
Discussion (0)
Add Comment
No comments yet. Be the first!