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Vulnerability record · CVE-2021-32760 · published 19 July 2021

CVE-2021-32760: Linuxfoundation containerd exposure of resource to wrong sphere vulnerability

Linuxfoundation · Containerd

containerd is a container runtime. A bug was found in containerd versions prior to 1.4.8 and 1.5.4 where pulling and extracting a specially-crafted container image can result in Unix file permission changes for existing files in the host’s filesystem. Changes to file permissions can deny access to the expected owner of the file, widen access to others, or set extended bits like setuid, setgid, and sticky. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process. This bug has been fixed in containerd 1.5.4 and 1.4.8. As a workaround, ensure that users only pull images from trusted sources. Linux security modules (LSMs) like SELinux and AppArmor can limit the files potentially affected by this bug through policies and profiles that prevent containerd from interacting with specific files.

6.3 CVSS 3.1 Medium EPSS 1.6% · top 25.3% CWE-668 · Exposure of resource to wrong sphereCWE-732 · Incorrect permission assignment
6.3CVSS 3.1 base score, v2 6.8
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

containerd is a container runtime. A bug was found in containerd versions prior to 1.4.8 and 1.5.4 where pulling and extracting a specially-crafted container image can result in Unix file permission changes for existing files in the host’s filesystem. Changes to file permissions can deny access to the expected owner of the file, widen access to others, or set extended bits like setuid, setgid, and sticky. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process. This bug has been fixed in containerd 1.5.4 and 1.4.8. As a workaround, ensure that users only pull images from trusted sources. Linux security modules (LSMs) like SELinux and AppArmor can limit the files potentially affected by this bug through policies and profiles that prevent containerd from interacting with specific files.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/containerd/containerd/releases/tag/v1.4.8 Release NotesThird Party Advisory
https://github.com/containerd/containerd/releases/tag/v1.5.4 Release NotesThird Party Advisory
https://github.com/containerd/containerd/security/advisories/GHSA-c72p-9xmj-rx3w Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDMNDPJJTP3J5GOEDB66F6M
https://security.gentoo.org/glsa/202401-31
https://github.com/containerd/containerd/releases/tag/v1.4.8 Release NotesThird Party Advisory
https://github.com/containerd/containerd/releases/tag/v1.5.4 Release NotesThird Party Advisory
https://github.com/containerd/containerd/security/advisories/GHSA-c72p-9xmj-rx3w Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDMNDPJJTP3J5GOEDB66F6M
https://security.gentoo.org/glsa/202401-31

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Source: NIST National Vulnerability Database (record CVE-2021-32760), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.