CVE-2025-5054
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.
Does this matter?
Lower severity and a low EPSS score (0.74%). Track it; it rarely justifies an emergency change on its own.
Description
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).
- CVSS 3.1
- 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.74% probability · 53th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- canonical/apport · canonical/ubuntu linux
- Source
- security@ubuntu.com
References
- https://ubuntu.com/security/CVE-2025-5054Third Party Advisory
- https://ubuntu.com/security/notices/USN-7545-1Third Party Advisory
- https://www.qualys.com/2025/05/29/apport-coredump/apport-coredump.txtExploit, Mitigation, Third Party Advisory
- http://seclists.org/fulldisclosure/2025/Jun/9
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.