High severity · published Oct 28, 2025
CVE-2025-61103
FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_link_lan_adj_sid function at ospf_ext.c
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_link_lan_adj_sid function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted OSPF packet.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
Frrouting · Frrouting
4.0 through 10.4.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-61103
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-61103
Exploit
https://github.com/FRRouting/frr/issues/19471
Issue Tracking
https://github.com/FRRouting/frr/pull/19480
Patch
https://github.com/FRRouting/frr/pull/19480/commits/fdd957408605d4a1766225630aafc7e6b7c3daf3
Third Party Advisory
https://github.com/s1awwhy/BugList/blob/main/CVE-2025-61103.md
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