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CVE-2021-47160

net: dsa: mt7530: fix VLAN traffic leaks PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 83163f7dca5684816d01c8ccf4857aa74801e7b7 before ae389812733b1b1e8e07fcc238e41db166b5c78d; affected 83163f7dca5684816d01c8ccf4857aa74801e7b7 before 4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488; affected 83163f7dca5684816d01c8ccf4857aa74801e7b7 before b91117b66fe875723a4e79ec6263526fffdb44d2; affected 83163f7dca5684816d01c8ccf4857aa74801e7b7 before 82ae35b6c14feae5f216913d5b433e143c756d4e; affected 83163f7dca5684816d01c8ccf4857aa74801e7b7 before 474a2ddaa192777522a7499784f1d60691cd831a
Linux / Linuxaffected 4.16; unaffected 0 before 4.16; unaffected 4.19.193 through 4.19.*; unaffected 5.4.124 through 5.4.*; unaffected 5.10.42 through 5.10.*; unaffected 5.12.9 through 5.12.*; unaffected 5.13 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.