SB20260912339 - Numeric Truncation Error in Linux kernel arm arm-smmu-v3 driver

Description

This security bulletin contains information about 1 vulnerability.

1) Numeric Truncation Error (CVE-ID: CVE-2026-89450)

CWE-ID: CWE-197 - Numeric Truncation Error

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to cause stream ID aliasing.

The vulnerability exists due to improper validation of virtual stream ID width in the tegra241-cmdqv virtual interface SID_MATCH register programming when configuring a guest-provided virtual stream ID. A local privileged user can supply a virtual stream ID exceeding the SID_MATCH field width to cause stream ID aliasing.

The hardware matches only a 20-bit stream ID.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/4379610c79bd88ddbea10e7f6c21e16d4b338c6b
• https://git.kernel.org/stable/c/445204550f894ca325ac80a21e3df177ad073798
• https://git.kernel.org/stable/c/d903d99ffd22b0180bd745a43f221c21bcdd8d7c