CVE-2026-6843

Nano: nano: format string vulnerability leads to denial of service

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.

Scores

Weaknesses (CWE)

• CWE-134

European references

• ENISA EUVD · EUVD-2026-24708
• GCVE · GCVE-0-2026-6843

CERT-FR advisories

• CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
• CERTFR-2026-AVI-0558 — Multiples vulnérabilités dans Microsoft Azure Linux · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

• 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:*:*:*:*:*:*:*

Affected products

References

• https://access.redhat.com/security/cve/CVE-2026-6843
• https://bugzilla.redhat.com/show_bug.cgi?id=2460017

Sources