CVE-2025-5054: Canonical Apport

Medium severity, CVSS 4.7. EPSS: 0.8% chance of exploitation in the next 30 days.

Race condition in Canonical apport up to and including 2.32.0 allows a local attacker to leak sensitive information via PID-reuse by leveraging namespaces. When handling a crash, the function `_check_global_pid_and_forward`, which detects if the crashing process resided in a container, was being called before `consistency_checks`, which attempts to detect if the crashing process had been replaced. Because of this, if a process crashed and was quickly replaced with a containerized one, apport could be made to forward the core dump to the container, potentially leaking sensitive information. `consistency_checks` is now being called before `_check_global_pid_and_forward`. Additionally, given that the PID-reuse race condition cannot be reliably detected from userspace alone, crashes are only forwarded to containers if the kernel provided a pidfd, or if the crashing process was unprivileged (i.e., if dump mode == 1).

Affected products

• Canonical Apport: up to and including 2.32.0
• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 20.04 only; version 22.04 only; version 24.04 only; version 24.10 only; …

Published 2025-05-30. Last modified 2026-06-17.