CVE-2025-61102: 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 showvtyextlinkadjsid function at ospfext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted OSPF packet.

Affected Software

20 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 cbl2 frr 8.5.5-3
Microsoft azl3 frr 9.1.1-4
Microsoft cbl2 frr 8.5.5-4
Microsoft cbl2 frr 8.5.5-5
Patch available
Microsoft azl3 frr 9.1.1-5
Patch available
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~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
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 ubuntu/frr to a version that resolves this vulnerability.

    Fixed in 8.1-1ubuntu1.14
  2. Upgrade

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

    Fixed in 8.4.4-1.1ubuntu6.5
  3. Upgrade

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

    Fixed in 10.4.1-3ubuntu1.1
  4. Upgrade

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

    Fixed in 10.5.1-1ubuntu2
  5. Upgrade

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

    Fixed in 8.4.4-1.1~deb12u2
  6. Upgrade

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

    Fixed in 10.3-3+deb13u1
  7. Upgrade

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

    Fixed in 10.5.1-3
  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-2025-61102?

CVE-2025-61102 has a severity rating of medium, as it can lead to a Denial of Service (DoS).

2

How do I fix CVE-2025-61102?

To fix CVE-2025-61102, upgrade to FRRouting version 10.4.2 or later, which contains the patch for this vulnerability.

3

What type of vulnerability is CVE-2025-61102?

CVE-2025-61102 is a NULL pointer dereference vulnerability in the FRRouting software.

4

Which versions of FRRouting are affected by CVE-2025-61102?

FRRouting versions from 4.0 to 10.4.1 are affected by CVE-2025-61102.

5

What is the impact of CVE-2025-61102?

The impact of CVE-2025-61102 is a potential Denial of Service, which can cause the affected service to become unavailable.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203