VulnerabilityAwaiting Analysis

CVE-2026-18839

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.

LOW 2.2EPSS 0.08%

Does this matter?

Lower severity and a low EPSS score (0.08%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 2.2 LOWCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
EPSS: 0.08% probability · 0th percentile
CISA KEV: Not listed
Weakness: CWE-191
Source: secalert@redhat.com

References

https://access.redhat.com/security/cve/CVE-2026-18839
https://bugzilla.redhat.com/show_bug.cgi?id=2511010

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.