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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

EcosystemPackageFixed inAdvisory
AlmaLinux:10frr10.4.4-1.el10_2ALSA-2026:24347
AlmaLinux:10frr-selinux10.4.4-1.el10_2ALSA-2026:24347
AlmaLinux:9frr1010.4.3-3.el9_8ALSA-2026:24370
AlmaLinux:9frr10-selinux10.4.3-3.el9_8ALSA-2026:24370
Debian:14frr10.6.0-2DEBIAN-CVE-2026-37459
Rocky Linux:10frr0:10.4.4-1.el10_2RLSA-2026:24347
Rocky Linux:9frr100:10.4.3-3.el9_8RLSA-2026:24370
Ubuntu:25.10frr10.4.1-3ubuntu1.4UBUNTU-CVE-2026-37459
Ubuntu:26.04:LTSfrr10.5.1-1ubuntu4.1UBUNTU-CVE-2026-37459

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

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