Out-of-bounds read in Linux kernel - CVE-2026-90117
Published: September 19, 2026
Vulnerability identifier: #VU151372
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90117
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to read memory outside an MFT record.
The vulnerability exists due to an out-of-bounds read in ntfs_mft_record_alloc() when reusing a free MFT record with a corrupted usa_ofs offset. A local user can create a file on a filesystem containing a corrupted MFT record to read memory outside an MFT record.
Affected software
Linux kernel
How to mitigate CVE-2026-90117
Install security update from vendor's repository.