FRRouting FRR up to 10.4.1 OSPF Packet ospf_ext.c show_vty_ext_link_rmt_itf_addr null pointer dereference

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3.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in FRRouting FRR up to 10.4.1. Affected is the function show_vty_ext_link_rmt_itf_addr of the file ospf_ext.c of the component OSPF Packet Handler. This manipulation causes null pointer dereference. This vulnerability is registered as CVE-2025-61101. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as problematic was found in FRRouting FRR up to 10.4.1. Affected by this vulnerability is the function show_vty_ext_link_rmt_itf_addr of the file ospf_ext.c of the component OSPF Packet Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_link_rmt_itf_addr function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted OSPF packet.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-61101 since 09/26/2025. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 271817 (Linux Distros Unpatched Vulnerability : CVE-2025-61101), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (271817) and CERT Bund (WID-SEC-2025-2428). Be aware that VulDB is the high quality source for vulnerability data.

Affected

Ubuntu Linux
SUSE Linux
SUSE openSUSE
FRRouting Project FRRouting

Productinfo

Vendor

FRRouting

Name

Version

Website

Product: https://github.com/FRRouting/frr/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 271817
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-61101

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: github.com

Timelineinfo

09/26/2025 CVE reserved
10/27/2025 +31 days VulDB entry created
10/28/2025 +0 days Advisory disclosed
02/27/2026 +122 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 19471
Status: Confirmed

CVE: CVE-2025-61101 (🔒)
GCVE (CVE): GCVE-0-2025-61101
GCVE (VulDB): GCVE-100-330175
CERT Bund: WID-SEC-2025-2428 - FRRouting (ospf_opaque.c): Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 10/28/2025 00:46
Updated: 02/27/2026 21:27
Changes: 10/28/2025 00:46 (58), 10/28/2025 20:20 (7), 11/01/2025 20:48 (2), 02/27/2026 21:27 (2)
Complete: 🔍
Cache ID: 216::103