CVE-2026-18839

Published: Aug 5, 2026Modified: Oct 8, 2026

2.2

Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L

Exploitability: 0.8 / Impact: 1.4

Source: secalert@redhat.com (Secondary)

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.

Related CWEs

CWE-191

Integer Underflow (Wrap or Wraparound)

The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

References (3)

https://access.redhat.com/errata/RHSA-2026:77932

Source: secalert@redhat.com

https://access.redhat.com/security/cve/CVE-2026-18839

Source: secalert@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2511010

Source: secalert@redhat.com

Timeline

No history available yet.