CVE-2018-1121
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...
- Published
- Jun 13, 2018
- Updated
- Aug 5, 2024
- Assigning CNA
- redhat
- Evidence observed
- May 30, 2018
Primary CVSS
nvd · CVSS 3.0
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:NLow · next 30 days
- Percentile
- 90.7%
- Model date
- Oct 13, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
Qualys Corporation · linux · May 30, 2018
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