# CVE-2025-61103: 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.

CVE-2025-61103 is fixed in 4 products on 1 platform, first by frr 8.1-1ubuntu1.14, released October 28, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-61103
- Priority: High
- CVSS: 7.5 (Moderate)
- EPSS: 0.0063
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 28, 2025
- Weakness: NULL Pointer Dereference
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-61103

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | frr Debian 12.15 (bookworm) | 8.4.4-1.1~deb12u2 | [DEBIAN-CVE-2025-61103](https://patchblox.com/security/data/fix/linux/debian-cve-2025-61103.md) | Oct 28, 2025 |
| Linux | frr Debian 13.5 (trixie) | 10.3-3+deb13u1 | [DEBIAN-CVE-2025-61103](https://patchblox.com/security/data/fix/linux/debian-cve-2025-61103.md) | Oct 28, 2025 |
| Linux | frr Debian 14 | 10.5.1-3 | [DEBIAN-CVE-2025-61103](https://patchblox.com/security/data/fix/linux/debian-cve-2025-61103.md) | Oct 28, 2025 |
| Linux | frr Ubuntu 22.04.1 LTS (jammy) | 8.1-1ubuntu1.14 | [frr 8.1-1ubuntu1.14](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-frr-8.1-1ubuntu1.14.md) | Oct 28, 2025 |
| Linux | frr Ubuntu 24.04.5 LTS (noble) | 8.4.4-1.1ubuntu6.5 | [frr 8.4.4-1.1ubuntu6.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-frr-8.4.4-1.1ubuntu6.5.md) | Oct 28, 2025 |
| Linux | frr Ubuntu 25.10 (questing) | 10.4.1-3ubuntu1.1 | [frr 10.4.1-3ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-frr-10.4.1-3ubuntu1.1.md) | Oct 28, 2025 |
| Linux | frr Ubuntu 26.04.1 LTS (resolute) | 10.5.1-1ubuntu2 | [frr 10.5.1-1ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-frr-10.5.1-1ubuntu2.md) | Oct 28, 2025 |
| Linux | frr opensuse-leap 15.6 | 8.5.6-150500.4.36.1 | [SUSE-SU-2026:1063-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1063-1.md) | Mar 26, 2026 |
| Linux | frr sles 15.7 | 8.5.6-150500.4.36.1 | [SUSE-SU-2026:1063-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1063-1.md) | Mar 26, 2026 |
| Linux | frr-pythontools Ubuntu 22.04.1 LTS (jammy) | 8.1-1ubuntu1.14 | [frr-pythontools 8.1-1ubuntu1.14](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-frr-pythontools-8.1-1ubuntu1.14.md) | Oct 28, 2025 |
| Linux | frr-pythontools Ubuntu 24.04.5 LTS (noble) | 8.4.4-1.1ubuntu6.5 | [frr-pythontools 8.4.4-1.1ubuntu6.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-frr-pythontools-8.4.4-1.1ubuntu6.5.md) | Oct 28, 2025 |
| Linux | frr-pythontools Ubuntu 25.10 (questing) | 10.4.1-3ubuntu1.1 | [frr-pythontools 10.4.1-3ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-frr-pythontools-10.4.1-3ubuntu1.1.md) | Oct 28, 2025 |
| Linux | frr-pythontools Ubuntu 26.04.1 LTS (resolute) | 10.5.1-1ubuntu2 | [frr-pythontools 10.5.1-1ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-frr-pythontools-10.5.1-1ubuntu2.md) | Oct 28, 2025 |
| Linux | frr-rpki-rtrlib Ubuntu 22.04.1 LTS (jammy) | 8.1-1ubuntu1.14 | [frr-rpki-rtrlib 8.1-1ubuntu1.14](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-frr-rpki-rtrlib-8.1-1ubuntu1.14.md) | Oct 28, 2025 |
| Linux | frr-rpki-rtrlib Ubuntu 24.04.5 LTS (noble) | 8.4.4-1.1ubuntu6.5 | [frr-rpki-rtrlib 8.4.4-1.1ubuntu6.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-frr-rpki-rtrlib-8.4.4-1.1ubuntu6.5.md) | Oct 28, 2025 |
| Linux | frr-rpki-rtrlib Ubuntu 25.10 (questing) | 10.4.1-3ubuntu1.1 | [frr-rpki-rtrlib 10.4.1-3ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-frr-rpki-rtrlib-10.4.1-3ubuntu1.1.md) | Oct 28, 2025 |
| Linux | frr-rpki-rtrlib Ubuntu 26.04.1 LTS (resolute) | 10.5.1-1ubuntu2 | [frr-rpki-rtrlib 10.5.1-1ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-frr-rpki-rtrlib-10.5.1-1ubuntu2.md) | Oct 28, 2025 |
| Linux | frr-snmp Ubuntu 22.04.1 LTS (jammy) | 8.1-1ubuntu1.14 | [frr-snmp 8.1-1ubuntu1.14](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-frr-snmp-8.1-1ubuntu1.14.md) | Oct 28, 2025 |
| Linux | frr-snmp Ubuntu 24.04.5 LTS (noble) | 8.4.4-1.1ubuntu6.5 | [frr-snmp 8.4.4-1.1ubuntu6.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-frr-snmp-8.4.4-1.1ubuntu6.5.md) | Oct 28, 2025 |
| Linux | frr-snmp Ubuntu 25.10 (questing) | 10.4.1-3ubuntu1.1 | [frr-snmp 10.4.1-3ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-frr-snmp-10.4.1-3ubuntu1.1.md) | Oct 28, 2025 |
| Linux | frr-snmp Ubuntu 26.04.1 LTS (resolute) | 10.5.1-1ubuntu2 | [frr-snmp 10.5.1-1ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-frr-snmp-10.5.1-1ubuntu2.md) | Oct 28, 2025 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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