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Security Advisory

USN-5672-1: GMP vulnerability




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 16.04
  • Canonical Ubuntu 18.04


It was discovered that GMP did not properly manage memory on 32-bit platforms when processing a specially crafted input. An attacker could possibly use this issue to cause applications using GMP to crash, resulting in a denial of service. Update Instructions: Run `sudo pro fix USN-5672-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libgmp10-doc – 2:6.1.0+dfsg-2ubuntu0.1~esm1 libgmpxx4ldbl – 2:6.1.0+dfsg-2ubuntu0.1~esm1 libgmp3-dev – 2:6.1.0+dfsg-2ubuntu0.1~esm1 libgmp10 – 2:6.1.0+dfsg-2ubuntu0.1~esm1 libgmp-dev – 2:6.1.0+dfsg-2ubuntu0.1~esm1 Available with Ubuntu Pro (Infra-only):

CVEs contained in this USN include: CVE-2021-43618.

Affected Cloud Foundry Products and Versions

Severity is low unless otherwise noted.

  • Bionic Stemcells
    • 1.x versions prior to 1.122
    • All other stemcells not listed.
  • cflinuxfs3
    • All versions prior to 0.328.0
  • CF Deployment
    • All versions prior to 23.0.0, or later versions with Bionic Stemcells prior to 1.122 or Xenial Stemcells prior to 621.304


Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

  • Bionic Stemcells
    • Upgrade 1.x versions to 1.122 or greater
    • All other stemcells should be upgraded to the latest version available on
  • cflinuxfs3
    • Upgrade all versions to 0.328.0 or greater
  • CF Deployment
    • Upgrade all versions to 23.0.0 or greater, upgrade Bionic Stemcells to 1.122 or greater, and upgrade Xenial Stemcells to 621.304 or greater


2022-12-07: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR