CVE-2025-61100: Null Pointer Dereference

Published Oct 27, 2025
·
Updated

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

Affected Software

20 affected componentsFixes available
Frrouting FRR>=2.0<=10.4.1
Frrouting FRRouting>=2.0<=10.4.1
Microsoft azl3 frr 9.1.1-3
Microsoft cbl2 frr 8.5.5-3
Microsoft cbl2 frr 8.5.5-5
Patch available
Microsoft cbl2 frr 8.5.5-4
Microsoft azl3 frr 9.1.1-4
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·07:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
Nov 2, 2025
Data Sourced
via Microsoft·01:02 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-2025-61100?

CVE-2025-61100 has been classified as a Denial of Service vulnerability.

2

How do I fix CVE-2025-61100?

To fix CVE-2025-61100, upgrade FRRouting frr to version 10.4.2 or later.

3

What versions of FRRouting are affected by CVE-2025-61100?

CVE-2025-61100 affects FRRouting frr versions from 2.0 up to and including 10.4.1.

4

What type of attack can CVE-2025-61100 facilitate?

CVE-2025-61100 can be exploited to cause a Denial of Service under specific malformed LSA conditions.

5

Who is responsible for the vulnerable software related to CVE-2025-61100?

FRRouting is the responsible party for the vulnerable software identified in CVE-2025-61100.

Company

Resources

Contact

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