CVE-2026-6843

A flaw was found in nano. A local user could exploit a format string vulnerability in the `statusline()` function. By creating a directory with a name containing `printf` specifiers, the application attempts to display this name, leading to a segmentation fault (SEGV). This results in a Denial of Service (DoS) for the `nano` application.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-6843	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2460017	Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gnu:nano:8.7:::::::*
	cpe:2.3:a:redhat:openshift_container_platform:4.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:6.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

History

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) Se encontró una falla en nano. Un usuario local podría explotar una vulnerabilidad de formato de cadena en la función ’statusline()’. Al crear un directorio con un nombre que contenga especificadores de ’printf’, la aplicación intenta mostrar este nombre, lo que provoca una falla de segmentación (SEGV). Esto resulta en una denegación de servicio (DoS) para la aplicación ’nano’.

Information

Published : 2026-04-22 09:16

Updated : 2026-10-26 21:10

NVD link : CVE-2026-6843

Mitre link : CVE-2026-6843

CVE.ORG link : CVE-2026-6843

JSON object : View

Products Affected

gnu

nano

redhat

openshift_container_platform
enterprise_linux

CWE

CWE-134

Use of Externally-Controlled Format String

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