CVE-2025-65409Public exploit

Local process crash via empty password

Published Dec 30, 2025 · Updated Dec 30, 2025

Divide-by-zero in GNU Recutils 1.9 allows local users to crash recfix by supplying an empty encryption or decryption password. recfix accepts an empty password value, and rec_encrypt and rec_decrypt use strlen(password) as the modulus divisor during key derivation. The flaw is reachable when Recutils is built with crypt support and crashes only the affected process with SIGFPE.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in GNU Recutils 1.9 allows local users to crash recfix by supplying an empty encryption or decryption password. recfix accepts an empty password value, and rec_encrypt and rec_decrypt use strlen(password) as the modulus divisor during key derivation. The flaw is reachable when Recutils is built with crypt support and crashes only the affected process with SIGFPE.

The record

CVE
CVE-2025-65409
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-369, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-369Divide By Zero
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

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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