CVE-2021-32760
This bug does not directly allow files to be read, modified, or executed without an additional cooperating process.
Does this matter?
Lower severity and a low EPSS score (1.59%). Track it; it rarely justifies an emergency change on its own.
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
- 6.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
- EPSS
- 1.59% probability · 76th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-668, CWE-732
- Affected
- linuxfoundation/containerd · fedoraproject/fedora
- Source
- security-advisories@github.com
EPSS 1.6% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/containerd/containerd/releases/tag/v1.4.8Release Notes, Third Party Advisory
- https://github.com/containerd/containerd/releases/tag/v1.5.4Release Notes, Third Party Advisory
- https://github.com/containerd/containerd/security/advisories/GHSA-c72p-9xmj-rx3wThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDMNDPJJTP3J5GOEDB66F6MGXUTRG3Y3/
- https://security.gentoo.org/glsa/202401-31
- https://github.com/containerd/containerd/releases/tag/v1.4.8Release Notes, Third Party Advisory
- https://github.com/containerd/containerd/releases/tag/v1.5.4Release Notes, Third Party Advisory
- https://github.com/containerd/containerd/security/advisories/GHSA-c72p-9xmj-rx3wThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDMNDPJJTP3J5GOEDB66F6MGXUTRG3Y3/
- https://security.gentoo.org/glsa/202401-31
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.