# frr 10.4.1-3ubuntu1.4: frr 10.4.1-3ubuntu1.4 for Ubuntu 25.10 (questing)

frr 10.4.1-3ubuntu1.4, released May 4, 2026, fixes 4 CVEs in frr. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-questing-frr-10.4.1-3ubuntu1.4
- Platform: Linux
- Released: May 4, 2026
- Priority: High (Closes CVE-2026-37457, high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [frr](https://patchblox.com/security/data/product/linux/frr.md) | Ubuntu 25.10 (questing) | 10.4.1-3ubuntu1.4 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-37457](https://patchblox.com/security/data/cve/CVE-2026-37457.md) | High | An off-by-one out-of-bounds write vulnerability in the bgp_flowspec_op_decode() function (bgpd/bgp_flowspec_util.c) of FRRouting (FRR) stable/10.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted FlowSpec component. | 7.5 | 0.0039 |  |
| [CVE-2026-37459](https://patchblox.com/security/data/cve/CVE-2026-37459.md) | High | An integer underflow in FRRouting (FRR) stable/10.0 to stable/10.6 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message. | 7.5 | 0.0037 |  |
| [CVE-2026-37458](https://patchblox.com/security/data/cve/CVE-2026-37458.md) | Routine | Missing input validation in the MP_REACH_NLRI component of FRRouting (FRR) stable/10.0 to stable/10.6 allows authenticated attackers to cause a Denial of Service (DoS) via supplying a crafted UPDATE message. | 6.5 | 0.0025 |  |
| [CVE-2026-28532](https://patchblox.com/security/data/cve/CVE-2026-28532.md) | Routine | frr: Harden TE/SR TLV iteration against malformed lengths (bsc#1263859). | n/a | 0.0023 |  |

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Data as of 2026-11-12T13:55:20Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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