SB2026091917 - Incorrect Conversion between Numeric Types in Linux kernel riscv net

Description

This security bulletin contains information about 1 vulnerability.

1) Incorrect Conversion between Numeric Types (CVE-ID: CVE-2026-90195)

CWE-ID: CWE-681 - Incorrect Conversion between Numeric Types

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/555fc6f1caf00ce7005e732b688da26c0dc3c5c5
• https://git.kernel.org/stable/c/71dbd143be598954ae103feadd12692aeb0f2f88
• https://git.kernel.org/stable/c/801ae90f8ce099187e6224cec7d72d07a4df0324
• https://git.kernel.org/stable/c/f2aaa621591093cfe8224a25ef2f04a3b1e304b0