What is CVE-2021-46923?

CVE-2021-46923 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.12 onward and patched in 5.15.13 and 5.16. CVE-2021-46923 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-46923?

CVE-2021-46923 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Is there a patch available for CVE-2021-46923?

Yes, CVE-2021-46923 has been patched. Fixed versions include 5.15.13 and 5.16. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-46923 actively exploited?

CVE-2021-46923 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-46923

Medium

In the Linux kernel, the following vulnerability has been resolved: fs/mount_setattr: always cleanup mount_kattr Make sure that finish_mount_kattr() is called after mount_kattr was succesfully built in both the success and failure case to prevent leaking any references we took when we built it. We returned early if path lookup failed thereby risking to leak an additional reference we took when building mount_kattr when an idmapped mount was requested.

Package Linux Kernel

Published 2024-02-27

Last modified 2024-11-21

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Vector string

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

Weakness type

CWE-668

CVE-2021-46923 is classified as CWE-668

See CWE-668 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 5.12 and later are affected. Fixed in 5.15.13, 5.16 and their respective stable series.

Affected from

≥ 5.12

Fixed in

✓ 5.15.13 5.15.x ✓ 5.16

References

2 total

Kernel Git
https://git.kernel.org/stable/c/012e332286e2bb9f6ac77d195f17e74b2963d663

Patch
Kernel Git
https://git.kernel.org/stable/c/47b5d0a7532d39e42a938f81e3904268145c341d

Patch

Details

CVE ID CVE-2021-46923

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-02-27

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-46923?

CVE-2021-46923 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.12 onward and has been patched in 5.15.13 and 5.16. CVE-2021-46923 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-46923?

CVE-2021-46923 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Is there a patch available for CVE-2021-46923?

Yes. CVE-2021-46923 has been patched. Fixed versions include 5.15.13 and 5.16. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-46923 actively exploited?

No. CVE-2021-46923 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.