PT-2026-36875 · Frrouting+3 · Frrouting+3

Jiahao Lei · CVE-2026-37459 · Published 2026-05-04 · Updated 2026-06-08

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions FRRouting (FRR) versions 10.0 through 10.6

Description An integer underflow occurs when a program calculates a value that is smaller than the minimum value the variable can hold, often wrapping around to a very large number. This issue allows attackers to cause a Denial of Service (DoS) by sending a specially crafted BGP UPDATE message.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Resource Exhaustion

Integer Underflow

Weakness Enumeration

CWE-400

CWE-191

Related Identifiers

ALSA-2026:24347

ALSA-2026:24370

CVE-2026-37459

OPENSUSE-SU-2026:10721-1

RHSA-2026:24347

RHSA-2026:24370

USN-8376-1

Affected Products

Frrouting

Linuxmint

Rocky Linux

Ubuntu

References · 36

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/37xxx/CVE-2026-37459.json · Exploit
• https://ubuntu.com/security/notices/USN-8376-1 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2026-24370.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-37458 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-37459 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-37459 · Security Note
• https://access.redhat.com/errata/RHSA-2026:24347 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8376-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-37459 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2026:24370 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-37459 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2026:24370 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-37459 · Vendor Advisory
• https://errata.almalinux.org/10/ALSA-2026-24347.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-37457 · Vendor Advisory