7.5

CVE-2025-61103: frrouting NULL Pointer Dereference

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2025-61103DEBIAN-CVE-2025-61103
Published 28-10-2025Last modified 28-10-2025
Open JSON

Vulnerability summary

CVE-2025-61103 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in frrouting. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 49.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.64%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
SUSE-SU-2026:0665-1SUSE-SU-2026:1057-1SUSE-SU-2026:1063-1USN-8046-1

Timeline

  1. 28-10-2025
    PublishedVulnerability first disclosed.
  2. 28-10-2025
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.64%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

+0.04 pp

From 0.60% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.64%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Frr

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Ubuntu2 products
  • frrAll versions (No fix recorded) | < 8.1-1ubuntu1.14 | < 8.4.4-1.1ubuntu6.5 | < 10.4.1-3ubuntu1.1 | < 10.5.1-1ubuntu2
  • quaggaAll versions (No fix recorded)
Debian1 product
  • frr< 8.4.4-1.1~deb12u2 | < 10.3-3+deb13u1 | < 10.5.1-3
Frrouting1 product

3 vendors · 4 products

References

9 links