Out-of-bounds write in Linux kernel - CVE-2026-90048
Published: September 16, 2026
Vulnerability identifier: #VU150238
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90048
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise confidentiality, integrity, and availability.
The vulnerability exists due to an out-of-bounds write in ni_create_attr_list() in the NTFS3 filesystem driver when processing a crafted loop-mounted NTFS image. A remote attacker can craft an NTFS image containing many nameless minimum-size resident attributes to compromise confidentiality, integrity, and availability.
Exploitation is reached by opening a file on the mounted image and adding an attribute.
Affected software
Linux kernel
How to mitigate CVE-2026-90048
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/7c4841e2a62794a3bab7c1ff0540580f387e377f
- https://git.kernel.org/stable/c/7e9aee7e4d9767cc3e423b3beecb01c7ebb6bbcd
- https://git.kernel.org/stable/c/a84f3db72561c4d9281c5ff721ce46b9ffa7f30e
- https://git.kernel.org/stable/c/d07e281f2a7710502985d6f80b95ddac8f4e81d5
- https://git.kernel.org/stable/c/fa2215cf451414b0512cd6f7d37a057893811f4d