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Security Advisory

USN-6310-1: json-c vulnerability

USN-6310-1: json-c vulnerability




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 22.04


It was discovered that json-c incorrectly handled certain JSON files. An attacker could possibly use this issue to cause a crash or execute arbitrary code. Update Instructions: Run `sudo pro fix USN-6310-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libjson-c-doc – 0.15-3~ubuntu1.22.04.2 libjson-c-dev – 0.15-3~ubuntu1.22.04.2 libjson-c5 – 0.15-3~ubuntu1.22.04.2 No subscription required

CVEs contained in this USN include: CVE-2021-32292.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • cflinuxfs4
    • All versions prior to 1.32.0
  • Jammy Stemcells
    • 1.x versions prior to 1.222
    • All other stemcells not listed.
  • CF Deployment
    • All versions with Jammy Stemcells prior to 1.222


Users of affected products are strongly encouraged to follow the mitigations below.

The Cloud Foundry project recommends upgrading the following releases:

  • cflinuxfs4
    • Upgrade all versions to 1.32.0 or greater
  • Jammy Stemcells
    • Upgrade 1.x versions to 1.222 or greater
    • All other stemcells should be upgraded to the latest version available on
  • CF Deployment
    • For all versions, upgrade Jammy Stemcells to 1.222 or greater


2023-10-05: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR