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.

High

CVSS

9.8

Important

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0055

46th percentile

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

Product	Fixed in	Fix	Released
Linux
linux · Debian 14	7.2.6-1	DEBIAN-CVE-2026-89610	Sep 23, 2026

Details

Published
September 11, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89610

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