What is CVE-2021-47389?

CVE-2021-47389 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.1 out of 10, classified as a Missing Release of Resource after Effective Lifetime flaw (CWE-772), affecting Linux kernel versions from 5.13 onward and patched in 5.14.10 and 5.15. CVE-2021-47389 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47389?

CVE-2021-47389 has a CVSS score of 5.1 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

Is there a patch available for CVE-2021-47389?

Yes, CVE-2021-47389 has been patched. Fixed versions include 5.14.10 and 5.15. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47389 actively exploited?

CVE-2021-47389 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47389

Medium

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: fix missing sev_decommission in sev_receive_start DECOMMISSION the current SEV context if binding an ASID fails after RECEIVE_START. Per AMD's SEV API, RECEIVE_START generates a new guest context and thus needs to be paired with DECOMMISSION: The RECEIVE_START command is the only command other than the LAUNCH_START command that generates a new guest context and guest handle. The missing DECOMMISSION can result in subsequent SEV launch failures, as the firmware leaks memory and might not able to allocate more SEV guest contexts in the future. Note, LAUNCH_START suffered the same bug, but was previously fixed by commit 934002cd660b ("KVM: SVM: Call SEV Guest Decommission if ASID binding fails").

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-02

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.1

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Vector string

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

Weakness type

CWE-772

CVE-2021-47389 is a Missing Release of Resource after Effective Lifetime vulnerability

What is Missing Release of Resource after Effective Lifetime?

The product does not release a resource after its effective lifetime has ended. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.13 and later are affected. Fixed in 5.14.10, 5.15 and their respective stable series.

Affected from

≥ 5.13

Fixed in

✓ 5.14.10 5.14.x ✓ 5.15

References

2 total

Kernel Git
https://git.kernel.org/stable/c/efd7866e114dcb44f86d151e843f8276b7efbc67

Patch
Kernel Git
https://git.kernel.org/stable/c/f1815e0aa770f2127c5df31eb5c2f0e37b60fa77

Patch

Details

CVE ID CVE-2021-47389

Severity Medium

CVSS score 5.1 / 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-2021-47389?

CVE-2021-47389 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.1 out of 10 , classified as a Missing Release of Resource after Effective Lifetime flaw (CWE-772) . It affects Linux kernel versions from 5.13 onward and has been patched in 5.14.10 and 5.15. CVE-2021-47389 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47389?

CVE-2021-47389 has a CVSS score of 5.1 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
Is there a patch available for CVE-2021-47389?

Yes. CVE-2021-47389 has been patched. Fixed versions include 5.14.10 and 5.15. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47389 actively exploited?

No. CVE-2021-47389 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.