Circle CI incident

RAM Disk is currently not usable in Docker jobs

Circle CI experienced a notice incident on November 7, 2025 affecting Docker Jobs, lasting 3d. The incident has been resolved; the full update timeline is below.

Started: Nov 07, 2025, 10:40 AM UTC
Resolved: Nov 10, 2025, 11:24 AM UTC
Duration: 3d
Detected by Pingoru: Nov 07, 2025, 10:40 AM UTC

Affected components

Docker Jobs

Update timeline

monitoring Nov 07, 2025, 10:40 AM UTC

At present customers running Docker containers cannot use /mnt/ramdisk. Customers will need to modify their configuration to use the filesystem instead. This has occurred in order to update the Docker Infrastructure that supports our `working_directory: /mnt/ramdisk` feature. This is a necessary step in order to address CVE-2025-31133, CVE-2025-52565, and CVE-2025-52881. This bug affects any Docker jobs utilizing `working_directory: /mnt/ramdisk`. Jobs will fail on checkout and workspace attachments. The immediate workaround will be to remove any usage of `working_directory: /mnt/ramdisk` from your job which will require an update of `.circleci/config.yml` Once this maintenance is complete, customers will be unable to utilize `working_directory: /mnt/ramdisk`until further notice.
resolved Nov 10, 2025, 11:24 AM UTC

We have identified and applied a workaround for the RAM DIsk issue, which means customers can resume builds using `/mnt/ramdisk`. We appreciate your patience and understanding whilst we worked on resolving this whilst ensuring the security of our platform for all customers.