Integer overflow in Linux kernel - CVE-2026-90200

Vulnerability identifier: #VU151290

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90200

CWE-ID: CWE-190

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to an integer overflow in MFT cluster validation in ntfs_init_from_boot() when mounting an NTFS volume with crafted boot-sector MFT cluster numbers. A local user can mount a crafted NTFS volume to cause a denial of service.

Linux kernel
Debian Linux
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/169383d8914b8fe03464a83540b5b6de3e7831af
• https://git.kernel.org/stable/c/805cc5554b13d045dce9b03c13eaf015418739fd
• https://git.kernel.org/stable/c/c510c63873103a5da6a498fe537bdb5d6f8d03a2
• https://git.kernel.org/stable/c/dc6d85de7e2656e56e10ff5ba514f2583a4f612b
• https://git.kernel.org/stable/c/f77a8d9fdf58e298b36564a44c27fadc617bdd28

• Integer overflow in Linux kernel ntfs3
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more