CVE-2025-61099Public exploitNetwork attack vector

Routing daemon crash via unchecked opaque LSA handler

Published Oct 27, 2025 · Updated Oct 27, 2025

NULL pointer dereference in FRRouting 2.0 through 10.4.1 allows remote attackers to crash ospfd via a crafted OSPF LS Update packet. The show_opaque_info_detail function in ospfd/ospf_opaque.c uses the function table returned for an opaque LSA without reliably validating both the table and its show_opaque_info callback. The crash requires detailed OSPF packet debugging to be enabled and interrupts the ospfd routing daemon when reachable OSPF traffic supplies the crafted LSA.

CVSS severity7.5
High
EPSS probability0.47%
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 2.0 through 10.4.1 allows remote attackers to crash ospfd via a crafted OSPF LS Update packet. The show_opaque_info_detail function in ospfd/ospf_opaque.c uses the function table returned for an opaque LSA without reliably validating both the table and its show_opaque_info callback. The crash requires detailed OSPF packet debugging to be enabled and interrupts the ospfd routing daemon when reachable OSPF traffic supplies the crafted LSA.

The record

CVE
CVE-2025-61099
Published
Oct 27, 2025
Updated
Oct 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 27, 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 exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application 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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