PT-2026-63568 · Red Hat · Red Hat Enterprise Linux 10+5

CVE-2026-6390 · Published 2026-07-23 · Updated 2026-07-23

NVD

CVSS v3.1

6.8

Medium

Base vector

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

A flaw was found in GNU nano's multi-buffer error message handling. When a user opens multiple files at startup and one triggers an ALERT-level error, a specially crafted filename containing printf format specifiers can be reinterpreted. This format string vulnerability may allow an attacker to achieve stack information disclosure, cause a denial of service (crash), or potentially perform arbitrary memory writes.

Fix

Use of Externally-Controlled Format String

Weakness Enumeration

CWE-134

Related Identifiers

CVE-2026-6390

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 Openshift Container Platform 4

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-6390 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-6390 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2458767 · Note