CVE-2025-24934Network attack vector

UDP packet spoofing via connected load-balancing sockets

Published Oct 22, 2025 · Updated Oct 22, 2025

Kernel socket isolation failure in FreeBSD 13.5-RELEASE, 14.3-RELEASE, and 15.0-BETA2 allows remote attackers to spoof UDP packets. The netinet in_pcb lookup places a connected UDP socket using SO_REUSEPORT_LB in the load-balancing hash and matches it for datagrams from hosts other than the connected peer. Exposure requires an application to set SO_REUSEPORT_LB before connecting the socket; accepted forged datagrams can alter application behavior or data, while software that omits the option is unaffected.

CVSS severity5.4
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Kernel socket isolation failure in FreeBSD 13.5-RELEASE, 14.3-RELEASE, and 15.0-BETA2 allows remote attackers to spoof UDP packets. The netinet in_pcb lookup places a connected UDP socket using SO_REUSEPORT_LB in the load-balancing hash and matches it for datagrams from hosts other than the connected peer. Exposure requires an application to set SO_REUSEPORT_LB before connecting the socket; accepted forged datagrams can alter application behavior or data, while software that omits the option is unaffected.

The record

CVE
CVE-2025-24934
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
The FreeBSD Project
Product
FreeBSD
Classifications
CWE-488, T1565.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 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=13.5-RELEASE <p6
  2. Affected versionversion=14.3-RELEASE <p5
  3. Affected versionversion=15.0-BETA2 <p1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The FreeBSD Project · FreeBSDversion=13.5-RELEASE <p6; version=14.3-RELEASE <p5; version=15.0-BETA2 <p1

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A: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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-488Exposure of Data Element to Wrong Session
T1565.002Transmitted Data Manipulation

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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