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CVE-2026-90134NVD
Vulnerability Summary
In the Linux kernel, the following vulnerability has been resolved:
ntfs: fix kmap_local_page() usage in compress
Several compressed I/O paths discard the address returned by
kmap_local_page() and later access or unmap the page using page_address().
This is invalid for highmem pages, and local mappings must also be unmapped
using the address returned by kmap_local_page().
Map each destination page in ntfs_decompress() only while producing the
current sub-block. Use memcpy_from_page(), memcpy_to_page(), and
memzero_page() for the other page accesses. Remove unnecessary local
mappings from ntfs_write_cb(), where pages are accessed through the vmap()
mapping.
ntfs: fix kmap_local_page() usage in compress
Several compressed I/O paths discard the address returned by
kmap_local_page() and later access or unmap the page using page_address().
This is invalid for highmem pages, and local mappings must also be unmapped
using the address returned by kmap_local_page().
Map each destination page in ntfs_decompress() only while producing the
current sub-block. Use memcpy_from_page(), memcpy_to_page(), and
memzero_page() for the other page accesses. Remove unnecessary local
mappings from ntfs_write_cb(), where pages are accessed through the vmap()
mapping.
Affected & Patched Versions
- Linux Linux >= 495e90fa334828d4119061e2726af51d0a0fb4ed and < 950e2ecc7aec21af24b05bc661a097a81c670409
- Linux Linux >= 495e90fa334828d4119061e2726af51d0a0fb4ed and < 6e03fbd5f772ad24ea64f7632e4d0d73184787ca
- Linux Linux >= 7.1
- Linux Linux 950e2ecc7aec21af24b05bc661a097a81c670409
- Linux Linux 6e03fbd5f772ad24ea64f7632e4d0d73184787ca