SB2026092863 - Improper Validation of Specified Quantity in Input in Linux kernel ntfs

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Validation of Specified Quantity in Input (CVE-ID: CVE-2026-98135)

CWE-ID: CWE-1284 - Improper Validation of Specified Quantity in Input

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to trigger undefined behavior in the kernel.

The vulnerability exists due to improper validation of a specified quantity in NTFS boot sector validation when parsing a crafted NTFS boot sector. A local user can provide an NTFS boot sector with an invalid sectors_per_cluster value to trigger undefined behavior in the kernel.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/323751a604e7533fa473874d999371592a614207
• https://git.kernel.org/stable/c/7524c3145a3bac92bebbc47a29c007f1d874c9b3