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procps-ng, procps is vulnerable to a process hiding through race condition. Since the kernel's proc_pid_readdir() returns PID entries in ascending numeric order, a process occupying a high PID can use inotify events to determine when the process list is being scanned, and fork/exec to obtain a lower PID, thus avoiding enumeration. An unprivileged attacker can hide a process from procps-ng's utilities by exploiting a race condition in reading /proc/PID entries. This vulnerability affects procps and procps-ng up to version 3.3.15, newer versions might be affected also.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | No solution exists | May 15, 2025 | Jun 13, 2018 |
| Gentoo Linux | — | Upgrade sys-process/procps. | May 31, 2018 | May 30, 2018 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jun 13, 2018 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Jun 13, 2018 |
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