CVE catalog

CVE-2026-65609

nnn is vulnerable to Out-of-Bound write…

[CVE catalog]

nnn is vulnerable to Out-of-Bound write vulnerability. Due to lack of validation of attacker-controlled length fields deserialized from a session file, a crafted session file can cause nnn to write data beyond the bounds of fixed-size global buffers when loaded with the -s option. An attacker who can place a malicious session file in the victim's nnn session directory can exploit this to corrupt adjacent global state. Maintainer of this project was notified about this vulnerability. It might has been addressed, but the maintainer did not provide a vulnerable version range. Only version 5.2 was tested and confirmed as vulnerable.

Severity
Medium · CVSS 6.6CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H
Published
Updated
Source
[NVD] · [CVE record]
EPSS
0.15% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [
    {
      "name": "nnn",
      "status": "vulnerable",
      "release": "sid",
      "version": "5.3-1"
    },
    {
      "name": "nnn",
      "status": "vulnerable",
      "release": "forky",
      "version": "5.3-1"
    },
    {
      "name": "nnn",
      "status": "vulnerable",
      "release": "trixie",
      "version": "5.0-1"
    },
    {
      "name": "nnn",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "4.7-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1145170,
      "name": "nnn",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1145170,
      "name": "nnn",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1145170,
      "name": "nnn",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1145170,
      "name": "nnn",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": []
}

[Debian bug #1145170]

Publisher notes

[trixie] nnn: Minor issue [bookworm] nnn: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [nnn]Unknown
    Details (2)

    • 4.7-1 · amd64 · bookworm

      Affected

      nvd · nnn · debian · bookworm; nvd · nnn · debian · 12

    • 4.7-1 · arm64 · bookworm

      Affected

      nvd · nnn · debian · bookworm; nvd · nnn · debian · 12

[Debian 13 (Trixie)]

  • [nnn]Unknown
    Details (2)

    • 5.0-1 · amd64 · trixie

      Affected

      nvd · nnn · debian · 13

    • 5.0-1 · arm64 · trixie

      Affected

      nvd · nnn · debian · 13

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]