CVE-2021-43816

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.68% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 75.2% of scored records. A rank, not a probability.

NVD base score

9.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2022-01-05 18:55Z4 YR AGO

Last updated

2025-04-22 18:34Z1 YR AGO

Reserved

2021-11-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.0)

CNA CVSS vector

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

Weaknesses

• CWE-281Improper Preservation of PermissionsBase

Data version

5.1

Document digest

3614072024f9b211d4a3f791ba3760d4e8f39d09392b486fb22c43302becb2c0

• github.comhttps://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9cx_refsource_CONFIRM
• github.comhttps://github.com/containerd/containerd/issues/6194x_refsource_MISC
• github.comhttps://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eeax_refsource_MISC
• github.comhttps://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2022-f668c3d70dhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2022-a0b2a4d594https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID/vendor-advisoryx_refsource_FEDORA