What is CVE-2021-47378?

CVE-2021-47378 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 4.8 onward and patched in 5.10.70, 5.14.9 and 5.15. CVE-2021-47378 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47378?

CVE-2021-47378 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47378?

Yes, CVE-2021-47378 has been patched. Fixed versions include 5.10.70, 5.14.9 and 5.15. If you are running Linux kernel 4.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47378 actively exploited?

CVE-2021-47378 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-2021-47378

Critical

In the Linux kernel, the following vulnerability has been resolved: nvme-rdma: destroy cm id before destroy qp to avoid use after free We should always destroy cm_id before destroy qp to avoid to get cma event after qp was destroyed, which may lead to use after free. In RDMA connection establishment error flow, don't destroy qp in cm event handler.Just report cm_error to upper level, qp will be destroy in nvme_rdma_alloc_queue() after destroy cm id.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-02

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2021-47378 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 4.8 and later are affected. Fixed in 5.10.70, 5.14.9, 5.15 and their respective stable series.

Affected from

≥ 4.8

Fixed in

✓ 5.10.70 5.10.x ✓ 5.14.9 5.14.x ✓ 5.15

References

3 total

Kernel Git
https://git.kernel.org/stable/c/9817d763dbe15327b9b3ff4404fa6f27f927e744

Patch
Kernel Git
https://git.kernel.org/stable/c/d268a182c56e8361e19fb781137411643312b994

Patch
Kernel Git
https://git.kernel.org/stable/c/ecf0dc5a904830c926a64feffd8e01141f89822f

Patch

Details

CVE ID CVE-2021-47378

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-04-02

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47378?

CVE-2021-47378 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 4.8 onward and has been patched in 5.10.70, 5.14.9 and 5.15. CVE-2021-47378 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47378?

CVE-2021-47378 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47378?

Yes. CVE-2021-47378 has been patched. Fixed versions include 5.10.70, 5.14.9 and 5.15. If you are running Linux kernel 4.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47378 actively exploited?

No. CVE-2021-47378 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.