SB20260812194 - Use of uninitialized resource in Linux kernel ethernet airoha driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use of uninitialized resource (CVE-ID: CVE-2026-68330)

CWE-ID: CWE-908 - Use of Uninitialized Resource

CVSSv4: 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]

The vulnerability allows a local user to cause silent data corruption.

The vulnerability exists due to improper DMA buffer synchronization in airoha_npu_send_msg() when processing NPU mailbox responses through a shared DMA buffer on non-cache-coherent systems. A local user can trigger mailbox operations that cause the CPU to read stale cached data to cause silent data corruption.

The issue is timing-sensitive and is more likely when the response is read immediately after DMA unmapping without intervening cache-evicting operations.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/4c4d866a64f36718cbcdf20add372a599dd44311
• https://git.kernel.org/stable/c/6f884eb87a79e0c482baef2ad96c96b81d024235
• https://git.kernel.org/stable/c/76fc5604308a109bf5838c2a0a0eb3ac6819f1ea