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DEBIAN-CVE-2026-6390

Type: advisorySource: OSV1 source record

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.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-6390

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-6390

nano

Source reference: /affected/0/package/name

Affected versions
7.2-1

Source reference: /affected/0/versions

7.2-1+deb12u1

Source reference: /affected/0/versions

7.2-2

Source reference: /affected/0/versions

8.0-1

Source reference: /affected/0/versions

8.1-1

Source reference: /affected/0/versions

8.2-1

Source reference: /affected/0/versions

8.3-1

Source reference: /affected/0/versions

8.4-1

Source reference: /affected/0/versions

8.5-1

Source reference: /affected/0/versions

8.6-1

Source reference: /affected/0/versions

8.7-1

Source reference: /affected/0/versions

8.7.1-1

Source reference: /affected/0/versions

9.0-1

Source reference: /affected/0/versions

9.1-1

Source reference: /affected/0/versions

9.2-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

nano

Source reference: /affected/1/package/name

Affected versions
8.4-1

Source reference: /affected/1/versions

8.4-1+deb13u1

Source reference: /affected/1/versions

8.5-1

Source reference: /affected/1/versions

8.6-1

Source reference: /affected/1/versions

8.7-1

Source reference: /affected/1/versions

8.7.1-1

Source reference: /affected/1/versions

9.0-1

Source reference: /affected/1/versions

9.1-1

Source reference: /affected/1/versions

9.2-1

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

nano

Source reference: /affected/2/package/name

Affected versions
8.4-1

Source reference: /affected/2/versions

8.5-1

Source reference: /affected/2/versions

8.6-1

Source reference: /affected/2/versions

8.7-1

Source reference: /affected/2/versions

8.7.1-1

Source reference: /affected/2/versions

Fixed versions
9.0-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "nano",
      "purl": "pkg:deb/debian/nano?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "7.2-1",
      "7.2-1+deb12u1",
      "7.2-2",
      "8.0-1",
      "8.1-1",
      "8.2-1",
      "8.3-1",
      "8.4-1",
      "8.5-1",
      "8.6-1",
      "8.7-1",
      "8.7.1-1",
      "9.0-1",
      "9.1-1",
      "9.2-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6390.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "nano",
      "purl": "pkg:deb/debian/nano?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "8.4-1",
      "8.4-1+deb13u1",
      "8.5-1",
      "8.6-1",
      "8.7-1",
      "8.7.1-1",
      "9.0-1",
      "9.1-1",
      "9.2-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6390.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "9.0-1"
          }
        ]
      }
    ],
    "package": {
      "name": "nano",
      "purl": "pkg:deb/debian/nano?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "8.4-1",
      "8.5-1",
      "8.6-1",
      "8.7-1",
      "8.7.1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6390.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#58128 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-6390 · Revision 1Source updated