CVE-2026-90134

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.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/950e2ecc7aec21af24b05bc661a097a81c670409
• https://git.kernel.org/stable/c/6e03fbd5f772ad24ea64f7632e4d0d73184787ca

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