What is CVE-2021-47328?

CVE-2021-47328 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 3.2.72 onward and patched in 4.19.198, 5.4.134, 5.10.52 and others. CVE-2021-47328 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47328?

CVE-2021-47328 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-2021-47328?

Yes, CVE-2021-47328 has been patched. Fixed versions include 4.19.198, 5.4.134, 5.10.52 and others. If you are running Linux kernel 3.2.72 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47328 actively exploited?

CVE-2021-47328 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-2021-47328

High

In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: Fix conn use after free during resets If we haven't done a unbind target call we can race where iscsi_conn_teardown wakes up the EH thread and then frees the conn while those threads are still accessing the conn ehwait. We can only do one TMF per session so this just moves the TMF fields from the conn to the session. We can then rely on the iscsi_session_teardown->iscsi_remove_session->__iscsi_unbind_session call to remove the target and it's devices, and know after that point there is no device or scsi-ml callout trying to access the session.

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-2021-47328 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 3.2.72, 3.4.111, 3.18.22, 4.1.7, 4.2 and later are affected. Fixed in 4.19.198, 5.4.134, 5.10.52, 5.12.19, 5.13.4, 5.14 and their respective stable series.

Affected from

≥ 3.2.72 ≥ 3.4.111 ≥ 3.18.22 ≥ 4.1.7 ≥ 4.2

Fixed in

✓ 4.19.198 4.19.x ✓ 5.4.134 5.4.x ✓ 5.10.52 5.10.x ✓ 5.12.19 5.12.x ✓ 5.13.4 5.13.x ✓ 5.14

References

6 total

Kernel Git
https://git.kernel.org/stable/c/89812e7957ab0746eab66ed6fc49d52bb4dca250

Patch
Kernel Git
https://git.kernel.org/stable/c/bf20d85a88384574fabb3d53ad62a8af57e7ab11

Patch
Kernel Git
https://git.kernel.org/stable/c/d04958a348e560938410e04a12fb99da9c7e6a00

Patch
Kernel Git
https://git.kernel.org/stable/c/ec29d0ac29be366450a7faffbcf8cba3a6a3b506

Patch
Kernel Git
https://git.kernel.org/stable/c/f0a031f7c55ffd944fead1ddaf2aa94df9a158c1

Patch

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2021-47328

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-2021-47328?

CVE-2021-47328 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 3.2.72 onward and has been patched in 4.19.198, 5.4.134, 5.10.52 and others. CVE-2021-47328 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47328?

CVE-2021-47328 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-2021-47328?

Yes. CVE-2021-47328 has been patched. Fixed versions include 4.19.198, 5.4.134, 5.10.52 and others. If you are running Linux kernel 3.2.72 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47328 actively exploited?

No. CVE-2021-47328 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.