Vulnerability · Published May 4, 2026 · Assigned by mitre
CVE-2026-37459
High 7.5
In plain English
A high-severity uncontrolled resource consumption in the frr package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 68.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | frr | 10.4.4-1.el10_2 | ALSA-2026:24347 |
| AlmaLinux:10 | frr-selinux | 10.4.4-1.el10_2 | ALSA-2026:24347 |
| AlmaLinux:9 | frr10 | 10.4.3-3.el9_8 | ALSA-2026:24370 |
| AlmaLinux:9 | frr10-selinux | 10.4.3-3.el9_8 | ALSA-2026:24370 |
| Debian:14 | frr | 10.6.0-2 | DEBIAN-CVE-2026-37459 |
| Rocky Linux:10 | frr | 0:10.4.4-1.el10_2 | RLSA-2026:24347 |
| Rocky Linux:9 | frr10 | 0:10.4.3-3.el9_8 | RLSA-2026:24370 |
| Ubuntu:25.10 | frr | 10.4.1-3ubuntu1.4 | UBUNTU-CVE-2026-37459 |
| Ubuntu:26.04:LTS | frr | 10.5.1-1ubuntu4.1 | UBUNTU-CVE-2026-37459 |
Affected products (as reported)
Weakness: CWE-400, CWE-191 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/FRRouting/frr/commit/693a2e02687cdc9d16501275e05136edea9650d9
- https://access.redhat.com/security/cve/CVE-2026-37459 vdb-entry, x_refsource_REDHAT
- RHBZ#2466513 issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-37459.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:24347 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:24370 vendor-advisory, x_refsource_REDHAT