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High, CVSS 8.6

Talos Linux ships runc vulnerable to the escape to the host attack

GHSA-g5p6-327m-3fxx

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/siderolabs/talos 1.6.4, 1.5.6), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
8.6 · CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Impact Snyk has discovered a vulnerability in all versions of runc <=1.1.11, as used by the Docker engine, along with other containerization technologies such as Kubernetes. Exploitation of this issue can result in container escape to the underlying host OS, either through executing a malicious image or building an image using a malicious Dockerfile or upstream image (i.e., when using FROM). This issue has been assigned the CVE-2024-21626. Patches runc runtime was updated to 1.1.12 in Talos v1.5.6 and v1.6.4. Workarounds Inspect the workloads running on the cluster to make sure they are not trying to exploit the vulnerability. References CVE-2024-21626 Vulnerability: runc process.cwd and leaked fds container breakout

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-g5p6-327m-3fxx

Agent brief

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# Patch Next advisory brief: GHSA-g5p6-327m-3fxx

Advisory: Talos Linux ships runc vulnerable to the escape to the host attack
IDs: GHSA-g5p6-327m-3fxx
Record: https://patchnext.com/advisories/ghsa-g5p6-327m-3fxx (revision 1, source checked 26 Oct 2026, 15:03 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/siderolabs/talos 1.6.4, 1.5.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/siderolabs/talos: affected >= 1.6.0, < 1.6.4; < 1.5.6; fixed in 1.6.4, 1.5.6

## Suggested inspection (read-only)
- Go github.com/siderolabs/talos: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/siderolabs/talos.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-g5p6-327m-3fxx (GitHub-reviewed advisory GHSA-g5p6-327m-3fxx lists affected ranges: Go github.com/siderolabs/talos >=1.6.0 =0 <1.5.6)

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