What is CVE-2021-47301?

CVE-2021-47301 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 4.12 onward and patched in 4.14.241, 4.19.199, 5.4.136 and others. CVE-2021-47301 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47301?

CVE-2021-47301 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-2021-47301?

Yes, CVE-2021-47301 has been patched. Fixed versions include 4.14.241, 4.19.199, 5.4.136 and others. If you are running Linux kernel 4.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47301 actively exploited?

CVE-2021-47301 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2021-47301

High

In the Linux kernel, the following vulnerability has been resolved: igb: Fix use-after-free error during reset Cleans the next descriptor to watch (next_to_watch) when cleaning the TX ring. Failure to do so can cause invalid memory accesses. If igb_poll() runs while the controller is reset this can lead to the driver try to free a skb that was already freed. (The crash is harder to reproduce with the igb driver, but the same potential problem exists as the code is identical to igc)

Package Linux Kernel

Published 2024-05-21

Last modified 2024-12-26

CVSS version 3.1

Patch available

Yes

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

Weakness type

CWE-416

CVE-2021-47301 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.12 and later are affected. Fixed in 4.14.241, 4.19.199, 5.4.136, 5.10.54, 5.13.6, 5.14 and their respective stable series.

Affected from

≥ 4.12

Fixed in

✓ 4.14.241 4.14.x ✓ 4.19.199 4.19.x ✓ 5.4.136 5.4.x ✓ 5.10.54 5.10.x ✓ 5.13.6 5.13.x ✓ 5.14

References

6 total

Kernel Git
https://git.kernel.org/stable/c/7b292608db23ccbbfbfa50cdb155d01725d7a52e

Patch
Kernel Git
https://git.kernel.org/stable/c/88e0720133d42d34851c8721cf5f289a50a8710f

Patch
Kernel Git
https://git.kernel.org/stable/c/8e24c12f2ff6d32fd9f057382f08e748ec97194c

Patch
Kernel Git
https://git.kernel.org/stable/c/d3ccb18ed5ac3283c7b31ecc685b499e580d5492

Patch
Kernel Git
https://git.kernel.org/stable/c/d7367f781e5a9ca5df9082b15b272b55e76931f8

Patch

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2021-47301

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2024-12-26

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47301?

CVE-2021-47301 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 4.12 onward and has been patched in 4.14.241, 4.19.199, 5.4.136 and others. CVE-2021-47301 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47301?

CVE-2021-47301 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-2021-47301?

Yes. CVE-2021-47301 has been patched. Fixed versions include 4.14.241, 4.19.199, 5.4.136 and others. If you are running Linux kernel 4.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47301 actively exploited?

No. CVE-2021-47301 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.