← CVE Intelligence

CVE-2026-89612

ntfs: reject invalid MFT LCNs from boot sector PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 11ccc9107dc460de28af90fac1f42404d9802735 before 8f8420b68a6f05ca2b03779d8208814ec539b9e5; affected 11ccc9107dc460de28af90fac1f42404d9802735 before cc9d09fef78410bcd37ac05168cbd5f6dd75d3d2
Linux / Linuxaffected 7.1; unaffected 0 before 7.1; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through *

CWE

No CWE identifiers supplied.

References