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Fencer Intel
medium 6.9

CVE-2026-53493 json

Containerd has image-pull DoS via crafted OCI index graph amplification

published last mo. modified last mo. also EUVD-2026-86486 , GHSA-pg57-6jwg-q645 , GO-2026-6597

cvss
6.9
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

containerd is an open-source container runtime. Prior to versions 1.7.36, 2.0.13, 2.2.9, 2.3.6, and 2.4.1, a crafted OCI index graph can force very high CPU/memory usage during PullImage (before container start), causing long ContainerCreating stalls and, at larger sizes, node/runtime instability. Versions 1.7.36, 2.0.13, 2.2.9, 2.3.6, and 2.4.1 fix the issue.

Patch / fix

  • go github.com/containerd/containerd/v2 2.0.13, 2.2.9, 2.3.6, 2.4.1
  • go github.com/containerd/containerd 1.7.36
  • linuxfoundation containerd 1.7.36, 2.0.13, 2.2.9, 2.3.6
  • containerd Debian 14 2.1.9+ds1-5

debian advisories DEBIAN-CVE-2026-53493

  • containerd Linux Micro 6.1 1.7.29-slfo.1.1_5.1
  • containerd SLES LTSS Extended Security 12 SP5 1.7.29-16.119.1

suse advisories SUSE-SU-2026:4923-1SUSE-SU-2026:24381-1

  • elemental openSUSE Tumbleweed 3.0.4-1.1

opensuse advisories openSUSE-SU-2026:12127-1

  • docker Alpine 3.24 29.8.2-r0
  • containerd Alpine 3.24 2.3.6-r0

alpine advisories ALPINE-CVE-2026-53493

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • moby-containerd-cc Azure Linux 3.0 1.7.7-19
  • containerd2 Azure Linux 3.0 2.3.6-1

azure linux advisories AZL-104081AZL-105123

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2026-53493 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-53493 updated cvss 5.3

github.com/containerd/containerd: containerd: Denial of Service via crafted OCI image index

  • Red Hat Hardened Images git-sync 4.7.1-0.1.hum1
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
last mo.

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
go github.com/containerd/containerd/v2
>=2.0.0, <2.0.13
>=2.1.0, <2.2.9
>=2.3.0, <2.3.6
>=2.4.0, <2.4.1
2.0.13
2.2.9
2.3.6
2.4.1
go github.com/containerd/containerd
<1.7.36
1.7.36

Affected products

  • containerd containerd

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-770 Allocation of Resources Without Limits or Throttling
  • CWE-834 Excessive Iteration

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.