CVE-2025-61103: Null Pointer Dereference
Published Oct 28, 2025
·Updated
FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the showvtyextlinklanadjsid function at ospfext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted OSPF packet.
Affected Software
8 affected componentsFixes available
Frrouting FRR>=4.0<=10.4.1
Frrouting FRRouting>=4.0<=10.4.1
Microsoft cbl2 frr 8.5.5-3
Microsoft azl3 frr 9.1.1-3
Microsoft cbl2 frr 8.5.5-5
Microsoft azl3 frr 9.1.1-4
Microsoft cbl2 frr 8.5.5-4
Microsoft azl3 frr 9.1.1-5
Remediation
Event History
Oct 28, 2025
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·03:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
Oct 31, 2025
Data Sourced
via Microsoft·01:10 AM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·01:10 AM
Affected Software
Updated
via Microsoft·08:10 AM
DescriptionSeverity
Updated
via Microsoft·08:10 AM
Affected Software
Frequently Asked Questions
1
What is the severity of CVE-2025-61103?
CVE-2025-61103 has a severity rating that indicates a medium risk due to its potential to cause a Denial of Service (DoS).
2
How do I fix CVE-2025-61103?
To fix CVE-2025-61103, you should upgrade to FRRouting version 10.4.2 or later.
3
What causes the CVE-2025-61103 vulnerability?
CVE-2025-61103 is caused by a NULL pointer dereference in the show_vty_ext_link_lan_adj_sid function at ospf_ext.c.
4
What software is affected by CVE-2025-61103?
CVE-2025-61103 affects FRRouting frr versions from 4.0 through 10.4.1.
5
What is the impact of exploiting CVE-2025-61103?
Exploiting CVE-2025-61103 can lead to a Denial of Service (DoS) condition by sending crafted OSPF packets.