CVE-2021-47160

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 v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a	Patch
https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488	Patch
https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e	Patch
https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d	Patch
https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2	Patch
https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a	Patch
https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488	Patch
https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e	Patch
https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d	Patch
https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc1::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc2::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc3::::::

History

No history.

Information

Published : 2024-03-25 10:15

Updated : 2025-03-13 21:24

NVD link : CVE-2021-47160

Mitre link : CVE-2021-47160

CVE.ORG link : CVE-2021-47160

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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Como port_bridge_{add,del} ha configurado PCR_MATRIX correctamente, elimine la escritura PCR_MATRIX de mt7530_port_set_vlan_aware."}], "lastModified": "2025-03-13T21:24:02.300", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "500F0F79-3117-4D09-AA90-639C7FA64175", "versionEndExcluding": "4.19.193", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "06FE0F99-F7A9-462A-8355-30E2EDA9826B", "versionEndExcluding": "5.4.124", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C3E7E799-1C8A-45FB-9E07-4731996144C9", "versionEndExcluding": "5.10.42", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2C8A1D02-81A7-44E5-ACFD-CC6A6694F930", "versionEndExcluding": "5.12.9", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DA610E30-717C-4700-9F77-A3C9244F3BFD"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}