CVE-2026-72471
Description
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: prevent potential lcn remains uninitialized The target VCN being sought was not found within runs[0], causing run_lookup() to return false. This causes run_lookup_entry() to return false, which in turn results in a len value of 0, and the new parameter passed to attr_data_get_block() is NULL. Collectively, these factors ultimately cause attr_data_get_block_locked() to exit prematurely without initializing lcn, thereby triggering [1]. To prevent [1], the clen check within ni_seek_data_or_hole() has been moved to occur before the lcn check. [1] BUG: KMSAN: uninit-value in ni_seek_data_or_hole+0x24f/0x5f0 fs/ntfs3/frecord.c:2862 ni_seek_data_or_hole+0x24f/0x5f0 fs/ntfs3/frecord.c:2862 ntfs_llseek+0x22a/0x4a0 fs/ntfs3/file.c:1530 vfs_llseek fs/read_write.c:391 [inline]
How to fix
- Linux Linux7ae7e98b71438c494532492cbf58fc0d7f7988bb, 57ac2831c8e0f168090d38e3de758c6a59db44db or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | c61326967728392931f8a2240cb2cf4c81b523c1 ≤ v < 7ae7e98b71438c494532492cbf58fc0d7f7988bb, c61326967728392931f8a2240cb2cf4c81b523c1 ≤ v < 57ac2831c8e0f168090d38e3de758c6a59db44db, 7.0 | 7ae7e98b71438c494532492cbf58fc0d7f7988bb, 57ac2831c8e0f168090d38e3de758c6a59db44db |
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