Archive package allows chmod of file outside of unpack target directory (CVE-2021-32760)

Archive package allows chmod of file outside of unpack target directory (CVE-2021-32760) | HOL Guard CVE

Why this deserves its current priority

CVSS is 5.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps github.com/containerd/containerd (go), github.com/containerd/containerd (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
github.com/containerd/containerdgo	>=0 <1.4.8	1.4.8
github.com/containerd/containerdgo	>=1.5.0 <1.5.4	1.5.4

Recommended response

Check inventory. Check lockfiles and deployed manifests for github.com/containerd/containerd, github.com/containerd/containerd.
Review the reported fix. Update github.com/containerd/containerd to 1.4.8; github.com/containerd/containerd to 1.5.4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 26, 2021
Evidence: source:osv:source_dates:source-dates:record
Source modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:record
First seen by HOL
Sep 10, 2026

Sources and claim methodology

Upstream source description

## Impact A bug was found in containerd 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. ## Patches This bug has been fixed in containerd 1.5.4 and 1.4.8. Users should update to these versions as soon as they are released. Running containers do not need to be restarted. ## Workarounds Ensure you 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 unexpected files. ## For more information If you have any questions or comments about this advisory: * [Open an issue](https://github.com/containerd/containerd/issues/new/choose) * Email us at [email protected] if you think you’ve found a security bug.

Quoted source text, attributed separately from HOL analysis.