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LIN1021-7864 : Security Advisory - linux - CVE-2021-47160

Created: Mar 25, 2024    Updated: May 23, 2024
Resolved Date: May 22, 2024
Found In Version:
Fix Version:
Severity: Standard
Applicable for: Wind River Linux LTS 21
Component/s: Kernel


In the Linux kernel, the following vulnerability has been resolved:

net: dsa: mt7530: fix VLAN traffic leaks

PCR_MATRIX field was set to all 1's when VLAN filtering is enabled, but
was not reset when it is disabled, which may cause traffic leaks:

        ip link add br0 type bridge vlan_filtering 1
        ip link add br1 type bridge vlan_filtering 1
        ip link set swp0 master br0
        ip link set swp1 master br1
        ip link set br0 type bridge vlan_filtering 0
        ip link set br1 type bridge vlan_filtering 0
        # traffic in br0 and br1 will start leaking to each other

As port_bridge_{add,del} have set up PCR_MATRIX properly, remove the
PCR_MATRIX write from mt7530_port_set_vlan_aware.

CREATE(Triage):(User=admin) CVE-2021-47160 (


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