What is CVE-2021-47367?

CVE-2021-47367 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Buffer Overflow flaw (CWE-119), affecting Linux kernel versions from 5.13 onward and patched in 5.14.9 and 5.15. CVE-2021-47367 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47367?

CVE-2021-47367 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-2021-47367?

Yes, CVE-2021-47367 has been patched. Fixed versions include 5.14.9 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-2021-47367 actively exploited?

CVE-2021-47367 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Buffer Overflow (CWE-119)?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/119.html

CVE-2021-47367

Medium

In the Linux kernel, the following vulnerability has been resolved: virtio-net: fix pages leaking when building skb in big mode We try to use build_skb() if we had sufficient tailroom. But we forget to release the unused pages chained via private in big mode which will leak pages. Fixing this by release the pages after building the skb in big mode.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-02

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-119

CVE-2021-47367 is a Buffer Overflow vulnerability

What is Buffer Overflow?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.13 and later are affected. Fixed in 5.14.9, 5.15 and their respective stable series.

Affected from

≥ 5.13

Fixed in

✓ 5.14.9 5.14.x ✓ 5.15

References

2 total

Kernel Git
https://git.kernel.org/stable/c/afd92d82c9d715fb97565408755acad81573591a

Patch
Kernel Git
https://git.kernel.org/stable/c/f020bb63b5d2e5576acadd10e158fe3b04af67ba

Patch

Details

CVE ID CVE-2021-47367

Severity Medium

CVSS score 5.5 / 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-2021-47367?

CVE-2021-47367 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Buffer Overflow flaw (CWE-119) . It affects Linux kernel versions from 5.13 onward and has been patched in 5.14.9 and 5.15. CVE-2021-47367 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47367?

CVE-2021-47367 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-2021-47367?

Yes. CVE-2021-47367 has been patched. Fixed versions include 5.14.9 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-2021-47367 actively exploited?

No. CVE-2021-47367 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.