# CVE-2026-72471: linux: In the Linux kernel, the following vulnerability has been resolved:  fs/ntfs3: prevent potential lcn remains uninitia...

CVE-2026-72471 is fixed in linux on 1 platform by DEBIAN-CVE-2026-72471 (version 7.1.5-1), released August 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-72471
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0033
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2026

## 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]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-72471](https://patchblox.com/security/data/fix/linux/debian-cve-2026-72471.md) | Aug 15, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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