Heap-based buffer overflow in Linux kernel - CVE-2026-90133
Published: September 19, 2026
Vulnerability identifier: #VU151357
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90133
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow in ntfs_ir_to_ib() when processing a crafted filesystem image. A local user can provide a crafted filesystem image with index root entries exceeding the available index block space to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-90133
Install security update from vendor's repository.