# CVE-2026-89610: ntfs: verify run length exceeding volume boundary

CVE-2026-89610 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89610 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-89610
- Priority: High
- CVSS: 9.8 (Important)
- EPSS: 0.0055
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 11, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89610

## Description

In the Linux kernel, the following vulnerability has been resolved:  ntfs: verify run length exceeding volume boundary  The mapping pairs decoder validates that the starting LCN is within the volume but does not check if the run extends beyond the volume boundary.  A malformed NTFS image with a crafted mapping pairs array could cause the kernel to access memory beyond the volume boundary, potentially leading to memory corruption and privilege escalation.  Add validation to ensure lcn + length stays within nr_clusters.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-89610](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89610.md) | Sep 23, 2026 |

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Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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