# CVE-2026-37460: Missing input validation in the rfapiRibBi2Ri() function (rfapi_rib.c) of 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. CVE-2026-37460 is fixed in 7 products on 1 platform, first by frr 7.2.1-1ubuntu0.2+esm4, released April 30, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-37460 - Priority: High - CVSS: 7.5 (Important) - EPSS: 0.0034 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 3, 2026 - Weakness: Improper Input Validation - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-37460 ## Description Missing input validation in the rfapiRibBi2Ri() function (rfapi_rib.c) of 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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | frr Debian 14 | 10.6.1-1 | [DEBIAN-CVE-2026-37460](https://patchblox.com/security/data/fix/linux/debian-cve-2026-37460.md) | Jun 24, 2026 | | Linux | frr RHEL 10 | 10.4.4-1.el10_2 | [RHSA-2026:24347](https://patchblox.com/security/data/fix/linux/rhsa-2026-24347.md) | Jun 24, 2026 | | Linux | frr RHEL 8 | 0:7.5.1-25.el8_10 | [RHSA-2026:49511](https://patchblox.com/security/data/fix/linux/rhsa-2026-49511.md) | Aug 5, 2026 | | Linux | frr RHEL 9 | 0:8.5.3-15.el9_8.1 | [RHSA-2026:49527](https://patchblox.com/security/data/fix/linux/rhsa-2026-49527.md) | Aug 5, 2026 | | Linux | frr Ubuntu 20.04 LTS (focal) | 7.2.1-1ubuntu0.2+esm4 | [frr 7.2.1-1ubuntu0.2+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-frr-7.2.1-1ubuntu0.2-esm4.md) | Apr 30, 2026 | | Linux | frr Ubuntu 22.04.1 LTS (jammy) | 8.1-1ubuntu1.15 | [frr 8.1-1ubuntu1.15](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-frr-8.1-1ubuntu1.15.md) | Apr 30, 2026 | | Linux | frr Ubuntu 24.04.5 LTS (noble) | 8.4.4-1.1ubuntu6.6 | [frr 8.4.4-1.1ubuntu6.6](https://patchblox.com/security/data/fix/linux/ubuntu-noble-frr-8.4.4-1.1ubuntu6.6.md) | Apr 30, 2026 | | Linux | frr Ubuntu 25.10 (questing) | 10.4.1-3ubuntu1.2 | [frr 10.4.1-3ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-frr-10.4.1-3ubuntu1.2.md) | Apr 30, 2026 | | Linux | frr almalinux 10 | 10.4.4-1.el10_2 | [ALSA-2026:24347](https://patchblox.com/security/data/fix/linux/alsa-2026-24347.md) | Jun 8, 2026 | | Linux | frr almalinux 8 | 7.5.1-25.el8_10 | [ALSA-2026:49511](https://patchblox.com/security/data/fix/linux/alsa-2026-49511.md) | Aug 3, 2026 | | Linux | frr almalinux 9 | 8.5.3-15.el9_8.1 | [ALSA-2026:49527](https://patchblox.com/security/data/fix/linux/alsa-2026-49527.md) | Aug 3, 2026 | | Linux | frr ol 8 | 0:7.5.1-25.0.1.el8_10 | [ELSA-2026-49511](https://patchblox.com/security/data/fix/linux/elsa-2026-49511.md) | Aug 3, 2026 | | Linux | frr ol 9 | 0:8.5.3-15.el9_8.1 | [ELSA-2026-49527](https://patchblox.com/security/data/fix/linux/elsa-2026-49527.md) | Aug 3, 2026 | | Linux | frr rocky 8 | 0:7.5.1-25.el8_10 | [RLSA-2026:49511](https://patchblox.com/security/data/fix/linux/rlsa-2026-49511.md) | Aug 4, 2026 | | Linux | frr rocky 9 | 0:8.5.3-15.el9_8.1 | [RLSA-2026:49527](https://patchblox.com/security/data/fix/linux/rlsa-2026-49527.md) | Aug 4, 2026 | | Linux | frr-pythontools Ubuntu 20.04 LTS (focal) | 7.2.1-1ubuntu0.2+esm4 | [frr-pythontools 7.2.1-1ubuntu0.2+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-frr-pythontools-7.2.1-1ubuntu0.2-esm4.md) | Apr 30, 2026 | | Linux | frr-pythontools Ubuntu 22.04.1 LTS (jammy) | 8.1-1ubuntu1.15 | [frr-pythontools 8.1-1ubuntu1.15](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-frr-pythontools-8.1-1ubuntu1.15.md) | Apr 30, 2026 | | Linux | frr-pythontools Ubuntu 24.04.5 LTS (noble) | 8.4.4-1.1ubuntu6.6 | [frr-pythontools 8.4.4-1.1ubuntu6.6](https://patchblox.com/security/data/fix/linux/ubuntu-noble-frr-pythontools-8.4.4-1.1ubuntu6.6.md) | Apr 30, 2026 | | Linux | frr-pythontools Ubuntu 25.10 (questing) | 10.4.1-3ubuntu1.2 | [frr-pythontools 10.4.1-3ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-frr-pythontools-10.4.1-3ubuntu1.2.md) | Apr 30, 2026 | | Linux | frr-rpki-rtrlib Ubuntu 20.04 LTS (focal) | 7.2.1-1ubuntu0.2+esm4 | [frr-rpki-rtrlib 7.2.1-1ubuntu0.2+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-frr-rpki-rtrlib-7.2.1-1ubuntu0.2-esm4.md) | Apr 30, 2026 | | Linux | frr-rpki-rtrlib Ubuntu 22.04.1 LTS (jammy) | 8.1-1ubuntu1.15 | [frr-rpki-rtrlib 8.1-1ubuntu1.15](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-frr-rpki-rtrlib-8.1-1ubuntu1.15.md) | Apr 30, 2026 | | Linux | frr-rpki-rtrlib Ubuntu 24.04.5 LTS (noble) | 8.4.4-1.1ubuntu6.6 | [frr-rpki-rtrlib 8.4.4-1.1ubuntu6.6](https://patchblox.com/security/data/fix/linux/ubuntu-noble-frr-rpki-rtrlib-8.4.4-1.1ubuntu6.6.md) | Apr 30, 2026 | | Linux | frr-rpki-rtrlib Ubuntu 25.10 (questing) | 10.4.1-3ubuntu1.2 | [frr-rpki-rtrlib 10.4.1-3ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-frr-rpki-rtrlib-10.4.1-3ubuntu1.2.md) | Apr 30, 2026 | | Linux | frr-selinux RHEL 8 | 0:7.5.1-25.el8_10 | [RHSA-2026:49511](https://patchblox.com/security/data/fix/linux/rhsa-2026-49511.md) | Aug 5, 2026 | | Linux | frr-selinux RHEL 9 | 0:8.5.3-15.el9_8.1 | [RHSA-2026:49527](https://patchblox.com/security/data/fix/linux/rhsa-2026-49527.md) | Aug 5, 2026 | | Linux | frr-selinux almalinux 10 | 10.4.4-1.el10_2 | [ALSA-2026:24347](https://patchblox.com/security/data/fix/linux/alsa-2026-24347.md) | Jun 8, 2026 | | Linux | frr-selinux almalinux 8 | 7.5.1-25.el8_10 | [ALSA-2026:49511](https://patchblox.com/security/data/fix/linux/alsa-2026-49511.md) | Aug 3, 2026 | | Linux | frr-selinux almalinux 9 | 8.5.3-15.el9_8.1 | [ALSA-2026:49527](https://patchblox.com/security/data/fix/linux/alsa-2026-49527.md) | Aug 3, 2026 | | Linux | frr-selinux ol 8 | 0:7.5.1-25.0.1.el8_10 | [ELSA-2026-49511](https://patchblox.com/security/data/fix/linux/elsa-2026-49511.md) | Aug 3, 2026 | | Linux | frr-selinux ol 9 | 0:8.5.3-15.el9_8.1 | [ELSA-2026-49527](https://patchblox.com/security/data/fix/linux/elsa-2026-49527.md) | Aug 3, 2026 | | Linux | frr-snmp Ubuntu 20.04 LTS (focal) | 7.2.1-1ubuntu0.2+esm4 | [frr-snmp 7.2.1-1ubuntu0.2+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-frr-snmp-7.2.1-1ubuntu0.2-esm4.md) | Apr 30, 2026 | | Linux | frr-snmp Ubuntu 22.04.1 LTS (jammy) | 8.1-1ubuntu1.15 | [frr-snmp 8.1-1ubuntu1.15](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-frr-snmp-8.1-1ubuntu1.15.md) | Apr 30, 2026 | | Linux | frr-snmp Ubuntu 24.04.5 LTS (noble) | 8.4.4-1.1ubuntu6.6 | [frr-snmp 8.4.4-1.1ubuntu6.6](https://patchblox.com/security/data/fix/linux/ubuntu-noble-frr-snmp-8.4.4-1.1ubuntu6.6.md) | Apr 30, 2026 | | Linux | frr-snmp Ubuntu 25.10 (questing) | 10.4.1-3ubuntu1.2 | [frr-snmp 10.4.1-3ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-frr-snmp-10.4.1-3ubuntu1.2.md) | Apr 30, 2026 | | Linux | frr10 RHEL 9 | 0:10.4.3-3.el9_8.2 | [RHSA-2026:49607](https://patchblox.com/security/data/fix/linux/rhsa-2026-49607.md) | Aug 5, 2026 | | Linux | frr10 almalinux 9 | 10.4.3-3.el9_8.2 | [ALSA-2026:49607](https://patchblox.com/security/data/fix/linux/alsa-2026-49607.md) | Aug 3, 2026 | | Linux | frr10 ol 9 | 0:10.4.3-3.el9_8.2 | [ELSA-2026-49607](https://patchblox.com/security/data/fix/linux/elsa-2026-49607.md) | Aug 3, 2026 | | Linux | frr10 rocky 9 | 0:10.4.3-3.el9_8.2 | [RLSA-2026:49607](https://patchblox.com/security/data/fix/linux/rlsa-2026-49607.md) | Aug 4, 2026 | | Linux | frr10-selinux RHEL 9 | 0:10.4.3-3.el9_8.2 | [RHSA-2026:49607](https://patchblox.com/security/data/fix/linux/rhsa-2026-49607.md) | Aug 5, 2026 | | Linux | frr10-selinux almalinux 9 | 10.4.3-3.el9_8.2 | [ALSA-2026:49607](https://patchblox.com/security/data/fix/linux/alsa-2026-49607.md) | Aug 3, 2026 | | Linux | frr10-selinux ol 9 | 0:10.4.3-3.el9_8.2 | [ELSA-2026-49607](https://patchblox.com/security/data/fix/linux/elsa-2026-49607.md) | Aug 3, 2026 | --- Data as of 2026-11-07T18:46:35Z UTC. 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