SB2026102268 - Use-after-free in Linux kernel ethernet airoha driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-98496)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to potentially cause a denial of service through a kernel use-after-free.

The vulnerability exists due to use-after-free in the Airoha NPU driver's watchdog work handling when driver teardown cancels work before releasing the watchdog interrupt. A local privileged user can exploit a timing window in which the interrupt handler queues work after cancellation to potentially cause a kernel crash when that work accesses freed memory.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/4bdee8060d1e4581624e68fbd369b1afb14df4bc
• https://git.kernel.org/stable/c/aca91d8fa0ecbc990ebf9a688c684dda78a43c00
• https://git.kernel.org/stable/c/da9d42531f3a6dfea2e9c775b62a46185dbf280a