An integer underflow was found in the popt library when formatting help text for option tables that exceed the terminal width. A local user who can cause an application to print help under those conditions may cause that application to crash or fail to display help, resulting in a denial of service of the affected application.
History

Fri, 07 Aug 2026 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Popt-devel
Popt-devel popt-static
Redhat hardened Images
Redhat openshift Container Platform
Vendors & Products Popt-devel
Popt-devel popt-static
Redhat hardened Images
Redhat openshift Container Platform

Thu, 06 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 06 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Low


Wed, 05 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
Description An integer underflow was found in the popt library when formatting help text for option tables that exceed the terminal width. A local user who can cause an application to print help under those conditions may cause that application to crash or fail to display help, resulting in a denial of service of the affected application.
Title Popt-devel: popt-static: size_t underflow in singleoptionhelp
First Time appeared Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat openshift
Weaknesses CWE-191
CPEs cpe:/a:redhat:hummingbird:1
cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat openshift
References
Metrics cvssV3_1

{'score': 2.2, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-06T13:34:06.418Z

Reserved: 2026-08-04T14:41:25.490Z

Link: CVE-2026-18839

cve-icon Vulnrichment

Updated: 2026-08-06T13:34:01.199Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Low

Publid Date: 2026-08-05T18:56:50Z

Links: CVE-2026-18839 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-07T10:04:57Z