CVE catalog
CVE-2021-21285
docker.io: CVE-2021-21285
- Severity
- Medium · CVSS 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.29% · Oct 25, 2026
In Docker before versions 9.03.15, 20.10.3 there is a vulnerability in which pulling an intentionally malformed Docker image manifest crashes the dockerd daemon. Versions 20.10.3 and 19.03.15 contain patches that prevent the daemon from crashing.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | docker.io | sid | 28.5.2+dfsg4-5 | fixed |
| Debian | docker.io | forky | 28.5.2+dfsg4-5 | fixed |
| Debian | docker.io | trixie | 26.1.5+dfsg1-9+deb13u1 | fixed |
| Debian | docker.io | trixie-security | 26.1.5+dfsg1-9+deb13u1 | fixed |
| Debian | docker.io | bookworm | 20.10.24+dfsg1-1+deb12u1 | fixed |
| Ubuntu | docker.io | pro | 1.6.2~dfsg1-1ubuntu4 | vulnerable |
| Ubuntu | docker.io | pro | 1.10.2-0ubuntu3 | vulnerable |
| Ubuntu | docker.io | pro | 1.10.2-0ubuntu4 | vulnerable |
| Ubuntu | docker.io | pro | 1.10.3-0ubuntu1 | vulnerable |
| Ubuntu | docker.io | pro | 1.10.3-0ubuntu4 | vulnerable |
| Ubuntu | docker.io | pro | 1.10.3-0ubuntu5 | vulnerable |
| Ubuntu | docker.io | pro | 1.10.3-0ubuntu6 | vulnerable |
| Ubuntu | docker.io | pro | 1.11.2-0ubuntu5~16.04 | vulnerable |
| Ubuntu | docker.io | pro | 1.12.1-0ubuntu13~16.04.1 | vulnerable |
| Ubuntu | docker.io | pro | 1.12.3-0ubuntu4~16.04.2 | vulnerable |
| Ubuntu | docker.io | pro | 1.12.6-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | docker.io | pro | 1.13.1-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | docker.io | pro | 17.03.2-0ubuntu2~16.04.1 | vulnerable |
| Ubuntu | docker.io | pro | 18.06.1-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | docker.io | pro | 18.06.1-0ubuntu1.2~16.04.1 | vulnerable |
| Ubuntu | docker.io | pro | 18.09.2-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | docker.io | pro | 18.09.5-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | docker.io | pro | 18.09.7-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | docker.io | pro | 18.09.7-0ubuntu1~16.04.4 | vulnerable |
| Ubuntu | docker.io | pro | 18.09.7-0ubuntu1~16.04.5 | vulnerable |
| Ubuntu | docker.io | pro | 18.09.7-0ubuntu1~16.04.6 | vulnerable |
| Ubuntu | docker.io | pro | 18.09.7-0ubuntu1~16.04.7 | vulnerable |
| Ubuntu | docker.io | pro | 18.09.7-0ubuntu1~16.04.9+esm1 | vulnerable |
| Ubuntu | docker.io | pro | 18.09.7-0ubuntu1~16.04.9+esm2 | vulnerable |
| Ubuntu | docker.io | 18.04 | 1.13.1-0ubuntu6 | vulnerable |
| Ubuntu | docker.io | 18.04 | 17.03.2-0ubuntu1 | vulnerable |
| Ubuntu | docker.io | 18.04 | 17.03.2-0ubuntu3 | vulnerable |
| Ubuntu | docker.io | 18.04 | 17.03.2-0ubuntu5 | vulnerable |
| Ubuntu | docker.io | 18.04 | 17.12.1-0ubuntu1 | vulnerable |
| Ubuntu | docker.io | 18.04 | 18.06.1-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | docker.io | 18.04 | 18.06.1-0ubuntu1.2~18.04.1 | vulnerable |
| Ubuntu | docker.io | 18.04 | 18.09.2-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | docker.io | 18.04 | 18.09.5-0ubuntu1~18.04.2 | vulnerable |
| Ubuntu | docker.io | 18.04 | 18.09.7-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | docker.io | 18.04 | 18.09.7-0ubuntu1~18.04.3 | vulnerable |
| Ubuntu | docker.io | 18.04 | 18.09.7-0ubuntu1~18.04.4 | vulnerable |
| Ubuntu | docker.io | 18.04 | 19.03.6-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | docker.io | 18.04 | 19.03.6-0ubuntu1~18.04.2 | vulnerable |
| Ubuntu | docker.io | 18.04 | 19.03.6-0ubuntu1~18.04.3 | vulnerable |
| Ubuntu | docker.io | 18.04 | 20.10.2-0ubuntu1~18.04.2 | vulnerable |
| Ubuntu | docker.io | 18.04 | 20.10.2-0ubuntu1~18.04.3 | vulnerable |
| Ubuntu | docker.io | 18.04 | 20.10.7-0ubuntu1~18.04.1 | fixed |
| Ubuntu | docker.io | 20.04 | 19.03.2-0ubuntu1 | vulnerable |
| Ubuntu | docker.io | 20.04 | 19.03.6-0ubuntu1 | vulnerable |
| Ubuntu | docker.io | 20.04 | 19.03.8-0ubuntu1 | vulnerable |
| Ubuntu | docker.io | 20.04 | 19.03.8-0ubuntu1.20.04 | vulnerable |
| Ubuntu | docker.io | 20.04 | 19.03.8-0ubuntu1.20.04.1 | vulnerable |
| Ubuntu | docker.io | 20.04 | 19.03.8-0ubuntu1.20.04.2 | vulnerable |
| Ubuntu | docker.io | 20.04 | 20.10.2-0ubuntu1~20.04.2 | vulnerable |
| Ubuntu | docker.io | 20.04 | 20.10.2-0ubuntu1~20.04.3 | vulnerable |
| Ubuntu | docker.io | 20.04 | 20.10.7-0ubuntu1~20.04.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | docker.io | source | sid | 20.10.3+dfsg1-1 | not yet assigned | Not reported | Not reported |
| Debian | docker.io | source | forky | 20.10.3+dfsg1-1 | not yet assigned | Not reported | Not reported |
| Debian | docker.io | source | trixie | 20.10.3+dfsg1-1 | not yet assigned | Not reported | Not reported |
| Debian | docker.io | source | bookworm | 20.10.3+dfsg1-1 | not yet assigned | Not reported | Not reported |
| Ubuntu | docker.io | deb | 18.04 | 20.10.7-0ubuntu1~18.04.1 | Not reported | UBUNTU-CVE-2021-21285 | Not reported |
| Ubuntu | docker.io | deb | 20.04 | 20.10.7-0ubuntu1~20.04.1 | Not reported | UBUNTU-CVE-2021-21285 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [docker-doc]Unknown
Source package: [docker.io]
Details (2)
20.10.24+dfsg1-1+deb12u1· all · bookwormFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · bookworm; dsa · docker.io · debian · 12
20.10.24+dfsg1-1+deb12u1· all · bookwormFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · bookworm; dsa · docker.io · debian · 12
- [docker.io]Unknown
Source package: [docker.io]
Details (2)
20.10.24+dfsg1-1+deb12u1+b6· amd64 · bookwormFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · bookworm; dsa · docker.io · debian · 12
20.10.24+dfsg1-1+deb12u1+b6· arm64 · bookwormFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · bookworm; dsa · docker.io · debian · 12
- [golang-github-docker-docker-dev]Unknown
Source package: [docker.io]
Details (2)
20.10.24+dfsg1-1+deb12u1· all · bookwormFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · bookworm; dsa · docker.io · debian · 12
20.10.24+dfsg1-1+deb12u1· all · bookwormFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · bookworm; dsa · docker.io · debian · 12
[Debian 13 (Trixie)]
- [docker-cli]Unknown
Source package: [docker.io]
Details (4)
26.1.5+dfsg1-9+b13· amd64 · trixieFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9+b13· arm64 · trixieFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· amd64 · trixie-securityFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· arm64 · trixie-securityFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
- [docker-doc]Unknown
Source package: [docker.io]
Details (4)
26.1.5+dfsg1-9· all · trixieFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9· all · trixieFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· all · trixie-securityFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· all · trixie-securityFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
- [docker.io]Unknown
Details (4)
26.1.5+dfsg1-9+b13· amd64 · trixieFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9+b13· arm64 · trixieFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· amd64 · trixie-securityFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· arm64 · trixie-securityFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
- [golang-github-docker-docker-dev]Unknown
Source package: [docker.io]
Details (4)
26.1.5+dfsg1-9· all · trixieFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9· all · trixieFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· all · trixie-securityFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· all · trixie-securityFixed · Fixed:
20.10.3+dfsg1-1dsa · docker.io · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2021_0435-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-21285]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-21285]
- [https://security-tracker.debian.org/tracker/CVE-2021-21285]
- [https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-21285.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2021/wid-sec-w-2023-2716.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]