modules:
  - module: github.com/opencontainers/runc
    versions:
      - fixed: 1.0.0-rc9.0.20200122160610-2fc03cc11c77
    packages:
      - package: github.com/opencontainers/runc/libcontainer
        symbols:
          - mountToRootfs
description: |
    A race while mounting volumes allows a possible symlink-exchange
    attack, allowing a user whom can start multiple containers with
    custom volume mount configurations to escape the container.
published: 2021-04-14T20:04:52Z
cves:
  - CVE-2019-19921
ghsas:
  - GHSA-fh74-hm69-rqjw
credit: Leopold Schabel
references:
  - fix: https://github.com/opencontainers/runc/pull/2207
  - fix: https://github.com/opencontainers/runc/commit/2fc03cc11c775b7a8b2e48d7ee447cb9bef32ad0
  - web: https://github.com/opencontainers/runc/issues/2197