CVE-2026-64244
drivers/base/memory: set mem->altmap after successful device registration
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 24, 2026 |
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Affected Versions
Linux / Linux
1a8c64e110435e44e71bcd50a75663174b575f22 < 802e113cf120df7208e4c7e604950a85e87120a8 1a8c64e110435e44e71bcd50a75663174b575f22 < 22dc0d042f02ce82aa61422ea5f232628bfd9e9c 1a8c64e110435e44e71bcd50a75663174b575f22 < 6c25bf4e44a2b6a14332f952bba0974521f5b72d 1a8c64e110435e44e71bcd50a75663174b575f22 < bc3dd82a0ffd488bb902f4c69c3d28fd4088d973 1a8c64e110435e44e71bcd50a75663174b575f22 < 059ac6252a63edf1cea79bf30bd860a8c264b62c 1a8c64e110435e44e71bcd50a75663174b575f22 < a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a
Linux / Linux
6.6
References
git.kernel.org: https://git.kernel.org/stable/c/802e113cf120df7208e4c7e604950a85e87120a8 git.kernel.org: https://git.kernel.org/stable/c/22dc0d042f02ce82aa61422ea5f232628bfd9e9c git.kernel.org: https://git.kernel.org/stable/c/6c25bf4e44a2b6a14332f952bba0974521f5b72d git.kernel.org: https://git.kernel.org/stable/c/bc3dd82a0ffd488bb902f4c69c3d28fd4088d973 git.kernel.org: https://git.kernel.org/stable/c/059ac6252a63edf1cea79bf30bd860a8c264b62c git.kernel.org: https://git.kernel.org/stable/c/a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a