SB2026062681 - 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-2026-53248)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to use-after-free in airoha metadata dst teardown in the airoha network driver when processing received packets that retain a non-refcounted metadata_dst pointer. A local user can trigger teardown while stale skb dst references remain to cause a denial of service.

The issue arises because skb_dst_set_noref() requires RCU read-side protection and the destination object must remain valid until all RCU readers have completed.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/4b5a574e033e66d2131eff1c18feef8d8643c67e
• https://git.kernel.org/stable/c/6f829e2c17a53a35321268339cd252aff6d6d723
• https://git.kernel.org/stable/c/b38cae85d1c45ff189d7ecb6ac36f41cdc3d84d0