CVE-2026-6390

Published: Jul 23, 2026Modified: Sep 1, 2026

6.8

Vector

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

Exploitability: 1.3 / Impact: 5.5

Source: secalert@redhat.com (Secondary)

Description

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.

Related CWEs

CWE-134

Use of Externally-Controlled Format String

The product uses a function that accepts a format string as an argument, but the format string originates from an external source.

References (2)

https://access.redhat.com/security/cve/CVE-2026-6390

Source: secalert@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2458767

Source: secalert@redhat.com

Timeline

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