Vulnerabilities CVE-2026-18839

CVE-2026-18839

Low

Open

TLP:CLEAR

Popt-devel: popt-static: size_t underflow in singleoptionhelp

NVD CVE.org

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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.

Details

CVSS Score: 2.2
EPSS Score ⓘ: 0.08%

0.3th percentile
CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
Confidence: 90%
Published: Aug 5, 2026
Last Modified: Aug 21, 2026

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