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Fencer Vulns
high 7.5

CVE-2025-61107 json

FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_pref_pref_sid function at…

published 2025-10-28 12 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-36526

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_pref_pref_sid function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted LSA Update packet.

Patch / fix

  • frr Debian 12 8.4.4-1.1~deb12u2
  • frr Debian 13 10.3-3+deb13u1
  • frr Debian 14 10.5.1-3

debian advisories DEBIAN-CVE-2025-61107

  • frr Ubuntu 22.04 LTS 8.1-1ubuntu1.14
  • frr Ubuntu 24.04 LTS 8.4.4-1.1ubuntu6.5
  • frr Ubuntu 25.10 10.4.1-3ubuntu1.1
  • frr Ubuntu 26.04 LTS 10.5.1-1ubuntu2

ubuntu advisories UBUNTU-CVE-2025-61107

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • frr SLE Module for Server Applications 15 SP7, openSUSE Leap 15.6 8.5.6-150500.4.36.1
  • frr SLE Module for Server Applications 15 SP7 10.2.1-150700.3.5.1
  • frr SLES LTSS Extended Security 12 SP5 8.5.6-8.9.1

suse advisories SUSE-SU-2026:1063-1SUSE-SU-2026:1057-1SUSE-SU-2026:0665-1

  • frr CBL-Mariner 2.0 8.5.5-5
  • frr Azure Linux 3.0 9.1.1-5

azure linux advisories AZL-69446AZL-69455

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-61107 updated cvss 5.9

frr: NULL pointer dereference in show_vty_ext_pref_pref_sid() in ospf_ext.c

  • Red Hat Enterprise Linux 8 frr, frr-contrib, frr-selinux Red Hat Enterprise Linux 9 frr, frr-selinux Red Hat Enterprise Linux 10 frr
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
12 mo ago

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/FRRouting/frr/issues/19471 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.