CVE-2018-1121
procps-ng, procps is vulnerable to a process hiding through race condition.
Does this matter?
A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 4.1%. Treat it as high on anything reachable from the internet.
Description
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 3.0
- 5.9 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 4.11% probability · 91th percentile
- Public exploits
- 1 in Exploit-DB · first 30 May 2018
- CISA KEV
- Not listed
- Weakness
- CWE-367, CWE-362
- Affected
- procps project/procps
- Source
- secalert@redhat.com
EPSS 4.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://seclists.org/oss-sec/2018/q2/122Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/104214Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121Issue Tracking, Third Party Advisory
- https://www.exploit-db.com/exploits/44806/Exploit, Third Party Advisory, VDB Entry
- https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txtExploit, Third Party Advisory
- http://seclists.org/oss-sec/2018/q2/122Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/104214Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121Issue Tracking, Third Party Advisory
- https://www.exploit-db.com/exploits/44806/Exploit, Third Party Advisory, VDB Entry
- https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txtExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.