SB2026091989 - Heap-based buffer overflow in Linux kernel ntfs
Published: September 19, 2026
Security Bulletin ID
SB2026091989
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Heap-based buffer overflow (CVE-ID: CVE-2026-90133)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.