Incorrect Conversion between Numeric Types in Linux kernel - CVE-2026-90195
Published: September 19, 2026
Vulnerability identifier: #VU151285
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90195
CWE-ID: CWE-681
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause incorrect handling of signed kfunc arguments.
The vulnerability exists due to incorrect numeric conversion in the RV64 BPF JIT compiler when processing signed 1-byte and 2-byte kfunc arguments. A local user can invoke a kfunc with signed 1-byte or 2-byte arguments to cause incorrect handling of signed kfunc arguments.
Affected software
Linux kernel
How to mitigate CVE-2026-90195
Install security update from vendor's repository.