net: dsa: mt7530: fix VLAN traffic leaks
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.1epss 0.3%
exploitation probability
0.3%top 74% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831ahttps://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4ehttps://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78dhttps://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2