NULL pointer dereference in Linux kernel - CVE-2026-90149
Published: September 19, 2026
Vulnerability identifier: #VU151341
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90149
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the NFSv4 flexfiles data server session and error-handling paths when processing I/O for NFSv4.0 data servers. A remote user can perform I/O operations against an NFSv4.0 flexfiles data server to cause a denial of service.
NFSv4.0 data server clients do not maintain sessions.
Affected software
Linux kernel
How to mitigate CVE-2026-90149
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3