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
Severity & Metrics
No CVSS data available.
Affected products (2)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| 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.* … |
References (6)
- https://git.kernel.org/stable/c/802e113cf120df7208e4c7e604950a85e87120a8
- https://git.kernel.org/stable/c/22dc0d042f02ce82aa61422ea5f232628bfd9e9c
- https://git.kernel.org/stable/c/6c25bf4e44a2b6a14332f952bba0974521f5b72d
- https://git.kernel.org/stable/c/bc3dd82a0ffd488bb902f4c69c3d28fd4088d973
- https://git.kernel.org/stable/c/059ac6252a63edf1cea79bf30bd860a8c264b62c
- https://git.kernel.org/stable/c/a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a