CVE-2025-61105: Null Pointer Dereference

Published Oct 27, 2025
·
Updated

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

Affected Software

17 affected componentsFixes available
Frrouting FRR>=4.0<=10.4.1
Frrouting FRRouting>=4.0<=10.4.1
Microsoft azl3 frr 9.1.1-3
Microsoft azl3 frr 9.1.1-5
Patch available
Microsoft azl3 frr 9.1.1-4
debian/frr<8.4.4-1.1~deb12u2
8.4.4-1.1~deb12u2
debian/frr<10.3-3+deb13u1
10.3-3+deb13u1
debian/frr<10.5.1-3
10.5.1-3
ubuntu/quagga*
ubuntu/quagga*
ubuntu/quagga*
ubuntu/frr*
ubuntu/frr<8.1-1ubuntu1.14
8.1-1ubuntu1.14
ubuntu/frr<8.4.4-1.1ubuntu6.5
8.4.4-1.1ubuntu6.5
ubuntu/frr<10.4.1-3ubuntu1.1
10.4.1-3ubuntu1.1
ubuntu/frr<10.5.1-1ubuntu2
10.5.1-1ubuntu2
debian/frr
8.4.4-1.1~deb12u210.3-3+deb13u110.7.1-7

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/frr to a version that resolves this vulnerability.

    Fixed in 8.4.4-1.1~deb12u2
  2. Upgrade

    Upgrade debian/frr to a version that resolves this vulnerability.

    Fixed in 10.3-3+deb13u1
  3. Upgrade

    Upgrade debian/frr to a version that resolves this vulnerability.

    Fixed in 10.5.1-3
  4. Upgrade

    Upgrade ubuntu/frr to a version that resolves this vulnerability.

    Fixed in 8.1-1ubuntu1.14
  5. Upgrade

    Upgrade ubuntu/frr to a version that resolves this vulnerability.

    Fixed in 8.4.4-1.1ubuntu6.5
  6. Upgrade

    Upgrade ubuntu/frr to a version that resolves this vulnerability.

    Fixed in 10.4.1-3ubuntu1.1
  7. Upgrade

    Upgrade ubuntu/frr to a version that resolves this vulnerability.

    Fixed in 10.5.1-1ubuntu2
  8. Upgrade

    Upgrade debian/frr to a version that resolves this vulnerability.

    Fixed in 8.4.4-1.1~deb12u2Fixed in 10.3-3+deb13u1Fixed in 10.7.1-7

Event History

Oct 27, 2025
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via OSV·12:00 AM
DescriptionSeverity
Data Sourced
via NVD·08:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Oct 31, 2025
Data Sourced
via Microsoft·01:11 AM
DescriptionSeverityWeaknessAffected Software
Nov 5, 2026
Data Sourced
via OSV·07:01 PM
Affected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is the severity of CVE-2025-61105?

CVE-2025-61105 has a medium severity rating as it results in a Denial of Service (DoS).

2

How do I fix CVE-2025-61105?

To fix CVE-2025-61105, update FRRouting from versions 4.0 through 10.4.1 to the latest patched version.

3

What impact does CVE-2025-61105 have on affected systems?

CVE-2025-61105 allows attackers to exploit a NULL pointer dereference causing potential Denial of Service on affected systems.

4

Which versions are affected by CVE-2025-61105?

Versions 4.0 through 10.4.1 of FRRouting are affected by CVE-2025-61105.

5

What component is primarily responsible for CVE-2025-61105?

The show_vty_link_info function in ospf_ext.c is primarily responsible for the NULL pointer dereference in CVE-2025-61105.

Company

Resources

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