PT-2026-67642 · Red Hat · Red Hat Enterprise Linux 10+6

CVE-2026-18739 · Published 2026-08-04 · Updated 2026-08-04

Mitre

CVSS v3.1

2.5

Low

Base vector

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

A flaw was found in popt, a command-line option parsing library. An off-by-one error in the poptStuffArgs function, when repeatedly called by a host application or through deep alias nesting, can lead to corruption of internal program data. This corruption could potentially enable a local attacker to execute arbitrary code if the host application then unsafely processes the altered data.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-18739

Affected Products

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 6

Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

Red Hat Hardened Images

Red Hat Openshift Container Platform 4

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-18739 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2510737 · Note
• https://access.redhat.com/security/cve/CVE-2026-18739 · Note