CVE-2025-61104Network attack vector

ospfd crash via unguarded NULL VTY output

Published Oct 28, 2025 · Updated Oct 28, 2025

NULL pointer dereference in FRRouting 4.0 through 10.4.1 allows remote attackers to crash ospfd with a crafted OSPF packet. The show_vty_unknown_tlv path calls check_tlv_size with a NULL VTY context, which check_tlv_size passes unguarded to vty_out. The non-default detailed OSPF packet-debugging setting must be active; exploitation terminates only ospfd and interrupts OSPF routing.

CVSS severity7.5
High
EPSS probability0.60%
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 FRRouting 4.0 through 10.4.1 allows remote attackers to crash ospfd with a crafted OSPF packet. The show_vty_unknown_tlv path calls check_tlv_size with a NULL VTY context, which check_tlv_size passes unguarded to vty_out. The non-default detailed OSPF packet-debugging setting must be active; exploitation terminates only ospfd and interrupts OSPF routing.

The record

CVE
CVE-2025-61104
Published
Oct 28, 2025
Updated
Oct 28, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 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 vectornetwork
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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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