Answer in brief
CVE-2021-47160 records a High severity (CVSS 8.1) vulnerability in net: dsa: mt7530: fix VLAN traffic leaks. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=83163f7dca5684816d01c8ccf4857aa74801e7b7 <ae389812733b1b1e8e07fcc238e41db166b5c78d || >=83163f7dca5684816d01c8ccf4857aa74801e7b7 <4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488 || >=83163f7dca5684816d01c8ccf4857aa74801e7b7 <b91117b66fe875723a4e79ec6263526fffdb44d2 || >=83163f7dca5684816d01c8ccf4857aa74801e7b7 <82ae35b6c14feae5f216913d5b433e143c756d4e || >=83163f7dca5684816d01c8ccf4857aa74801e7b7 <474a2ddaa192777522a7499784f1d60691cd831a | ae389812733b1b1e8e07fcc238e41db166b5c78d, 4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488, b91117b66fe875723a4e79ec6263526fffdb44d2, 82ae35b6c14feae5f216913d5b433e143c756d4e, 474a2ddaa192777522a7499784f1d60691cd831a |
| Linux/Linuxgeneric | 4.16 | Not reported |
Published upstream
Mar 25, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2021-47160 records a High severity (CVSS 8.1) vulnerability in net: dsa: mt7530: fix VLAN traffic leaks. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=83163f7dca5684816d01c8ccf4857aa74801e7b7 <ae389812733b1b1e8e07fcc238e41db166b5c78d || >=83163f7dca5684816d01c8ccf4857aa74801e7b7 <4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488 || >=83163f7dca5684816d01c8ccf4857aa74801e7b7 <b91117b66fe875723a4e79ec6263526fffdb44d2 || >=83163f7dca5684816d01c8ccf4857aa74801e7b7 <82ae35b6c14feae5f216913d5b433e143c756d4e || >=83163f7dca5684816d01c8ccf4857aa74801e7b7 <474a2ddaa192777522a7499784f1d60691cd831a | ae389812733b1b1e8e07fcc238e41db166b5c78d, 4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488, b91117b66fe875723a4e79ec6263526fffdb44d2, 82ae35b6c14feae5f216913d5b433e143c756d4e, 474a2ddaa192777522a7499784f1d60691cd831a |
| Linux/Linuxgeneric | 4.16 | Not reported |
Published upstream
Mar 25, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.