Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Docker Engine (the Go package github.com/moby/moby) versions before 19.03.15, and 20.10.0-beta1 through 20.10.2, are vulnerable. An attacker who can get the daemon to pull a deliberately malformed image manifest can crash dockerd. The source gives few details about other impacts or the required access. Upgrade to 19.03.15 or 20.10.3, which contain patches that prevent the crash.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.5 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.033, the 88th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:15 UTC First seen by agentprime
- 31 Oct 2026, 14:15 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-6fj5-m822-rqx8
- OSV: GHSA-6fj5-m822-rqx8
- github.com/moby/moby/security/advisories/GHSA-6fj5-m822-rqx8
- nvd.nist.gov/vuln/detail/CVE-2021-21285
- github.com/moby/moby/commit/8d3179546e79065adefa67cc697c09d0ab137d30
- docs.docker.com/engine/release-notes/#20103
- github.com/moby/moby/releases/tag/v19.03.15
- github.com/moby/moby/releases/tag/v20.10.3
- security.gentoo.org/glsa/202107-23
- security.netapp.com/advisory/ntap-20210226-0005
- www.debian.org/security/2021/dsa-4865