CVE-2025-14769Network attack vector

Remote system crash via freed packet processing

Published Mar 9, 2026 · Updated Mar 9, 2026

NULL pointer dereference in FreeBSD ipfw 13.5-RELEASE before p8 and 14.3-RELEASE before p7 allows remote attackers to crash the system. The tcp-setmss handler can free packet data on an error without stopping rule evaluation, so a later allow rule dereferences a NULL packet pointer. Exploitation requires ipfw rules that use tcp-setmss followed by a rule that permits the crafted traffic, and the resulting kernel fault interrupts the host.

CVSS severity7.5
High
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in FreeBSD ipfw 13.5-RELEASE before p8 and 14.3-RELEASE before p7 allows remote attackers to crash the system. The tcp-setmss handler can free packet data on an error without stopping rule evaluation, so a later allow rule dereferences a NULL packet pointer. Exploitation requires ipfw rules that use tcp-setmss followed by a rule that permits the crafted traffic, and the resulting kernel fault interrupts the host.

The record

CVE
CVE-2025-14769
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
The FreeBSD Project
Product
FreeBSD
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 2026Record 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=13.5-RELEASE <p8
  2. Affected versionversion=14.3-RELEASE <p7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The FreeBSD Project · FreeBSDversion=13.5-RELEASE <p8; version=14.3-RELEASE <p7

Published CVSS scores

7.5CISACVSS: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.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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