Out-of-bounds write in Linux kernel - CVE-2026-90118
Published: September 19, 2026
Vulnerability identifier: #VU151373
CSH Severity: Medium
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90118
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to write beyond a destination page.
The vulnerability exists due to an off-by-one error in the per-token range check in ntfs_decompress() when processing a corrupted compressed $DATA attribute during a file read. A remote attacker can supply a corrupted compressed $DATA attribute to write beyond a destination page.
Affected software
Linux kernel
How to mitigate CVE-2026-90118
Install security update from vendor's repository.