CVE-2021-47160

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47160
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47160.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-47160
Downstream
Related
Published
2024-03-25T10:15:08Z
Modified
2025-08-09T20:01:26Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
Summary
[none]
Details

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 portbridge{add,del} have set up PCRMATRIX properly, remove the PCRMATRIX write from mt7530portsetvlanaware.

References

Affected packages