CVE-2026-6843 — MEDIUM (5.5)

Vulnerability Description

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 Score

5.5

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Gnu	Nano	8.7
Redhat	Openshift Container Platform	4.0
Redhat	Enterprise Linux	6.0

Related Weaknesses (CWE)

CWE-134

References

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

FAQ

What is CVE-2026-6843?

CVE-2026-6843 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 a...

How severe is CVE-2026-6843?

CVE-2026-6843 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-6843?

Check the references section above for vendor advisories and patch information. Affected products include: Gnu Nano, Redhat Openshift Container Platform, Redhat Enterprise Linux.