CVE-2018-1121
mediumpriority · track · 35EPSS 0.041 · 91 %ileexploit · PoCEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.9–5.9
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
- EDB-44806Procps-ng - Multiple VulnerabilitiesPoC · exploit_db
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (17)
External citations — patches, advisories, analysis.
- http://seclists.org/oss-sec/2018/q2/122cnnvd
- http://www.securityfocus.com/bid/104214cnnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121cnnvd
- https://security.gentoo.org/glsa/201805-14cnnvd
- https://www.exploit-db.com/exploits/44806/cnnvd
- https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txtcnnvd
- https://www.securityfocus.com/bid/104214cnnvd
- http://seclists.org/oss-sec/2018/q2/122enisa_euvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan