What is CVE-2021-47160?

CVE-2021-47160 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, affecting Linux kernel versions from 4.16 onward and patched in 4.19.193, 5.4.124, 5.10.42 and others. CVE-2021-47160 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47160?

CVE-2021-47160 has a CVSS score of 7.1 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Is there a patch available for CVE-2021-47160?

Yes, CVE-2021-47160 has been patched. Fixed versions include 4.19.193, 5.4.124, 5.10.42 and others. If you are running Linux kernel 4.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47160 actively exploited?

CVE-2021-47160 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47160

High

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.

Package Linux Kernel

Published 2024-03-25

Last modified 2025-03-13

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected versions

Linux kernel versions 4.16 and later are affected. Fixed in 4.19.193, 5.4.124, 5.10.42, 5.12.9, 5.13 and their respective stable series.

Affected from

≥ 4.16

Fixed in

✓ 4.19.193 4.19.x ✓ 5.4.124 5.4.x ✓ 5.10.42 5.10.x ✓ 5.12.9 5.12.x ✓ 5.13

References

5 total

Kernel Git
https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a

Patch
Kernel Git
https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488

Patch
Kernel Git
https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e

Patch
Kernel Git
https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d

Patch
Kernel Git
https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2

Patch

Details

CVE ID CVE-2021-47160

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2024-03-25

Modified 2025-03-13

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47160?

CVE-2021-47160 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 . It affects Linux kernel versions from 4.16 onward and has been patched in 4.19.193, 5.4.124, 5.10.42 and others. CVE-2021-47160 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47160?

CVE-2021-47160 has a CVSS score of 7.1 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
Is there a patch available for CVE-2021-47160?

Yes. CVE-2021-47160 has been patched. Fixed versions include 4.19.193, 5.4.124, 5.10.42 and others. If you are running Linux kernel 4.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47160 actively exploited?

No. CVE-2021-47160 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.