CVE-2025-13566

Local process crash via duplicate content free

Published Nov 23, 2025 · Updated Nov 24, 2025

Double free in floating-window handling in Arun Prakash Jana nnn 5.0 and 5.1 allows local users to crash the process. When newwin fails in show_content_in_floating_window, the callee frees the content buffer, and show_stats later frees the same pointer. Triggering the failure requires local access and reaches only the running nnn process, interrupting that user's file-manager session.

CVSS severity4.8
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in floating-window handling in Arun Prakash Jana nnn 5.0 and 5.1 allows local users to crash the process. When newwin fails in show_content_in_floating_window, the callee frees the content buffer, and show_stats later frees the same pointer. Triggering the failure requires local access and reaches only the running nnn process, interrupting that user's file-manager session.

The record

CVE
CVE-2025-13566
Published
Nov 23, 2025
Updated
Nov 24, 2025
Vendor
Arun Prakash Jana
Product
nnn
Classifications
CWE-119, CWE-415, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0
  2. Affected versionversion=5.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Arun Prakash Jana · nnnversion=5.0; version=5.1

Published CVSS scores

3.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
1.7VulDBAV:L/AC:L/Au:S/C:N/I:N/A:P
4.8VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-415Double Free
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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