Improper input validation in Linux kernel - CVE-2026-90146
Published: September 19, 2026
Vulnerability identifier: #VU151338
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90146
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to bypass XDP program attachment restrictions.
The vulnerability exists due to improper input validation in XDP link update handling when replacing an XDP program through BPF_LINK_UPDATE. A local user can create an XDP link with a normal program and replace it with an offloaded or device-bound program to bypass XDP program attachment restrictions.
Affected software
Linux kernel
How to mitigate CVE-2026-90146
Install security update from vendor's repository.