01 Record

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 order, a process occupying a high PID can use

LowPUBLISHEDCNA: redhat

CNA base score3.9 CVSS v3.xCVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L

View raw JSON

02 Description

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 4.10% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 90.6% of scored records. A rank, not a probability.
NVD base score: 5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2018-06-13 20:00Z8 YR AGO

Last updated

2024-08-05 03:51Z2 YR AGO

Reserved

2017-12-04

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Low (CVSS 3.9)

CNA CVSS vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L

Weaknesses

CWE-367Time-of-check Time-of-use (TOCTOU) Race ConditionBase
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class

Data version

5.1

Document digest

d9e252f10d60d05d8066a4bc9596b2de53c3ed88cd530e5cc919f3c5508984c7

05 Affected products

VendorProductVersionsPlatforms

[UNKNOWN]procps-ng, procpsup to procps-ng 3.3.15 and newer—

06 References

www.exploit-db.com44806https://www.exploit-db.com/exploits/44806/exploitx_refsource_EXPLOIT-DB
bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1121x_refsource_CONFIRM
www.securityfocus.com104214http://www.securityfocus.com/bid/104214vdb-entryx_refsource_BID
seclists.org[oss-security] 20180517 Qualys Security Advisory - Procps-ng Audit Reporthttp://seclists.org/oss-sec/2018/q2/122mailing-listx_refsource_MLIST
www.qualys.comhttps://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txtx_refsource_MISC

07 Fixed in

Arch Linux

linux
Fixed in 4.17.2-1
linux-hardened
Fixed in 4.17a-1
linux-lts
Fixed in 4.14.44-1
linux-zen
Fixed in 4.17-1

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

Debian 12

linux
No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.