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

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3.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in FRRouting FRR up to 10.4.1. Affected by this issue is the function show_vty_ext_link_adj_sid of the file ospf_ext.c of the component OSPF Packet Handler. Performing a manipulation results in null pointer dereference. This vulnerability is reported as CVE-2025-61102. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in FRRouting FRR up to 10.4.1. This affects the function show_vty_ext_link_adj_sid 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. CWE is classifying the issue as 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. This is going to have an impact on 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_adj_sid function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted OSPF packet.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-61102 since 09/26/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 271824 (Linux Distros Unpatched Vulnerability : CVE-2025-61102), 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 (271824) and CERT Bund (WID-SEC-2025-2428). Several companies clearly confirm that VulDB is the primary source for best 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

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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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: 271824
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-61102

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-2025-61102 (🔒)
GCVE (CVE): GCVE-0-2025-61102
GCVE (VulDB): GCVE-100-330177
CERT Bund: WID-SEC-2025-2428 - FRRouting (ospf_opaque.c): Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 10/28/2025 00:47
Updated: 02/27/2026 21:27
Changes: 10/28/2025 00:47 (58), 10/28/2025 20:20 (7), 11/01/2025 19:41 (2), 02/27/2026 21:27 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.