CVE-2026-89612

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-89612

Key Details

CVE	CVE-2026-89612
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

ntfs: reject invalid MFT LCNs from boot sector

The NTFS boot sector stores the MFT and MFTMirr locations as unsigned

64-bit LCNs, but parse_ntfs_boot_sector() decoded them into an s64.

A crafted high-bit value could therefore become negative and pass

the existing upper-bound check. The invalid value then propagated into

the MFT zone allocator and could result in an out-of-bounds access to

lcn_empty_bits_per_page. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-89612
CVE	https://www.cve.org/CVERecord?id=CVE-2026-89612

Source

Reference

NVD

CVE