CVE-2026-90419
kernel: nilfs2: prevent out-of-bounds read in super root block parsing
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 20, 2026
Description
A flaw was found in the nilfs2 filesystem implementation within the Linux kernel. This vulnerability occurs due to insufficient validation of super-root inode metadata size before parsing. A local attacker could craft a malicious filesystem image that, when processed, causes an out-of-bounds read past the end of the super-root block. This could lead to information disclosure or a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-125 · Out-of-bounds Read