CVE-2026-37460 Denial of service in n/a
Attackers can cause a Denial of Service in FRRouting by sending a crafted BGP UPDATE message due to missing input validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-37460?
CVE-2026-37460 is a high-severity denial of service vulnerability in n/a, published on 3 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-20
Which versions are affected by CVE-2026-37460?
Linux distribution packages (21)
frr AlmaLinux:8 | All versions | 7.5.1-25.el8_10 |
frr-selinux AlmaLinux:8 | All versions | 7.5.1-25.el8_10 |
frr AlmaLinux:9 | All versions | 8.5.3-15.el9_8.1 |
frr-selinux AlmaLinux:9 | All versions | 8.5.3-15.el9_8.1 |
frr10 AlmaLinux:9 | All versions | 10.4.3-3.el9_8.2 |
frr10-selinux AlmaLinux:9 | All versions | 10.4.3-3.el9_8.2 |
frr Red Hat:enterprise_linux:8::appstream | All versions | 0:7.5.1-25.el8_10 |
frr-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:7.5.1-25.el8_10 |
frr-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:7.5.1-25.el8_10 |
frr-selinux Red Hat:enterprise_linux:8::appstream | All versions | 0:7.5.1-25.el8_10 |
frr Red Hat:enterprise_linux:9::appstream | All versions | 0:8.5.3-15.el9_8.1 |
frr-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:8.5.3-15.el9_8.1 |
frr-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 0:8.5.3-15.el9_8.1 |
frr-selinux Red Hat:enterprise_linux:9::appstream | All versions | 0:8.5.3-15.el9_8.1 |
frr10 Red Hat:enterprise_linux:9::appstream | All versions | 0:10.4.3-3.el9_8.2 |
frr10-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:10.4.3-3.el9_8.2 |
frr10-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 0:10.4.3-3.el9_8.2 |
frr10-selinux Red Hat:enterprise_linux:9::appstream | All versions | 0:10.4.3-3.el9_8.2 |
frr Rocky Linux:8 | All versions | 0:7.5.1-25.el8_10 |
frr Rocky Linux:9 | All versions | 0:8.5.3-15.el9_8.1 |
frr10 Rocky Linux:9 | All versions | 0:10.4.3-3.el9_8.2 |
How do I fix CVE-2026-37460?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-37460 being exploited?
There is no known exploitation of CVE-2026-37460 in the wild and no public exploit code.
Sources
Also known as ALSA-2026:49511, ALSA-2026:49527, ALSA-2026:49607, CLSA-2026-1786035720, DEBIAN-CVE-2026-37460, GHSA-4ph9-3c4q-r2hh and 7 more.