What is CVE-2021-47293?

CVE-2021-47293 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10. CVE-2021-47293 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47293?

CVE-2021-47293 has a CVSS score of 7.8 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:H/A:H.

Is there a patch available for CVE-2021-47293?

No patch is currently available for CVE-2021-47293. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47293 actively exploited?

CVE-2021-47293 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47293

High

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_skbmod: Skip non-Ethernet packets Currently tcf_skbmod_act() assumes that packets use Ethernet as their L2 protocol, which is not always the case. As an example, for CAN devices: $ ip link add dev vcan0 type vcan $ ip link set up vcan0 $ tc qdisc add dev vcan0 root handle 1: htb $ tc filter add dev vcan0 parent 1: protocol ip prio 10 \ matchall action skbmod swap mac Doing the above silently corrupts all the packets. Do not perform skbmod actions for non-Ethernet packets.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-05-07

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

References

The following references provide additional information about CVE-2021-47293 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/071729150be9e1d1b851b70efb6d91ee9269d57b
Patch
Kernel patch commit
https://git.kernel.org/stable/c/34f1e1f657fae2891b485a3b2b95fe4d2aef9f0d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/727d6a8b7ef3d25080fad228b2c4a1d4da5999c6
Patch

5 patch commits total View all on NVD

Details

CVE ID CVE-2021-47293

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-05-07

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47293?

CVE-2021-47293 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . CVE-2021-47293 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47293?

CVE-2021-47293 has a CVSS score of 7.8 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:H/A:H.
Is there a patch available for CVE-2021-47293?

No patch is currently available for CVE-2021-47293. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47293 actively exploited?

No — CVE-2021-47293 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.