Threats Tagged 'cve-2026-53063'

A vulnerability in the Linux kernel's device mapper cache subsystem caused write operations to hang in passthrough mode due to incomplete handling of write hit bios after cache invalidation. The issue was fixed by improving the logic to properly submit remapped writes and enhancing error handling to preserve original error statuses.

In the Linux kernel, the following vulnerability has been resolved: dm cache: fix write hang in passthrough mode The invalidate_remove() function has incomplete logic for handling write hit bios after cache invalidation. It sets up the remapping for the overwrite_bio but then drops it immediately without submission, causing write operations to hang. Fix by adding a new invalidate_committed() continuation that submits the remapped writes to the cache origin after metadata commit completes, while using the overwrite_endio hook to ensure proper completion sequencing. This maintains existing coherency. Also improve error handling in invalidate_complete() to preserve the original error status instead of using bio_io_error() unconditionally.