Description
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.
Affected products
frrouting: frrouting
References4
- github.com/FRRouting/frr/pull/19480/commits/fdd957408605d4a1766… Patch
- github.com/FRRouting/frr/issues/19471 ExploitIssue TrackingThird Party Advisory
- github.com/FRRouting/frr/pull/19480 Issue TrackingThird Party Advisory
- github.com/s1awwhy/BugList/blob/main/CVE-2025-61102.md Third Party Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 43 · as of 10 November 2026
- CWE
- CWE-476
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.