# CVE-2026-72185: linux: In the Linux kernel, the following vulnerability has been resolved:  ntfs: fix WARN_ON for resident attribute in ntfs...

CVE-2026-72185 is fixed in linux on 1 platform by DEBIAN-CVE-2026-72185 (version 7.1.5-1), released August 15, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-72185
- Priority: Urgent
- CVSS: 9.8 (critical)
- EPSS: 0.0067
- 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:  ntfs: fix WARN_ON for resident attribute in ntfs_map_runlist_nolock()  When ntfs_map_runlist_nolock() needs to look up the attribute extent containing a target VCN (ctx_needs_reset == true), it calls ntfs_attr_lookup() and then expects the result to be a non-resident attribute, since only non-resident attributes have a mapping pairs array to decompress.  A crafted NTFS image can place a resident attribute where a non-resident one is expected, causing ntfs_attr_lookup() to succeed but return a resident attribute record.  Previously this was caught only by a WARN_ON(), which does not stop execution.  The code then falls through to read a->data.non_resident.highest_vcn from what is actually a resident attribute, accessing the wrong union member and corrupting the VCN range check.  The caller path triggering this warning during mount is:    ntfs_map_runlist_nolock   ntfs_empty_logfile   load_system_files   ntfs_fill_super  In this path ctx is NULL, so ntfs_map_runlist_nolock() allocates a temporary search context internally and sets ctx_needs_reset = true. The existing resident-attribute guard in the ctx != NULL branch already returns -EIO silently for the same condition; make the ctx_needs_reset path consistent by replacing the WARN_ON() with the same -EIO error return.  This causes the crafted image to be rejected with a mount error instead of triggering a kernel warning.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-72185](https://patchblox.com/security/data/fix/linux/debian-cve-2026-72185.md) | Aug 15, 2026 |

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Data as of 2026-11-08T13:06:02Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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