CVE-2026-37459: Integer Underflow
Published May 4, 2026
·Updated
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 Software
1 affected component
Frrouting FRR>=stable/10.0<=stable/10.6
Event History
May 4, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·06:16 PM
DescriptionSeverityWeakness
Data Sourced
via Red Hat·07:03 PM
DescriptionSeverityAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-37459?
CVE-2026-37459 has a high severity rating of 7.5 on the CVSS scale.
2
How do I fix CVE-2026-37459?
To mitigate CVE-2026-37459, update FRRouting to a patched version beyond stable/10.6.
3
What impact does CVE-2026-37459 have on my system?
CVE-2026-37459 allows attackers to exploit an integer underflow, potentially leading to a Denial of Service (DoS).
4
Which versions of FRRouting are affected by CVE-2026-37459?
CVE-2026-37459 affects FRRouting versions from stable/10.0 to stable/10.6.
5
What type of attack is associated with CVE-2026-37459?
CVE-2026-37459 is associated with a Denial of Service (DoS) attack via a crafted BGP UPDATE message.