CVE-2026-37457: frrouting Out-of-bounds Write
CVSS: 7.5v3.1HighModified
AliasesRHSA-2026:24340RHSA-2026:24371UBUNTU-CVE-2026-37457DEBIAN-CVE-2026-37457
Published 01-05-2026Last modified 15-07-2026
Vulnerability summary
CVE-2026-37457 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in frrouting. EPSS estimates a 0.72% chance of exploitation in the next 30 days, higher than 52.9% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
0.72%
0%100%
Low · +0.33 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 7Timeline
- 01-05-2026PublishedVulnerability first disclosed.
- 15-07-2026Last modifiedVulnerability information updated.
Description
An off-by-one out-of-bounds write vulnerability in the bgp_flowspec_op_decode() function (bgpd/bgp_flowspec_util.c) of FRRouting (FRR) stable/10.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted FlowSpec component.
CVSS metrics
5 scores · 5 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 5 agree
- OSV · Red hatEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.72%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
+0.33 pp
From 0.39% on 20-09-2026
20-09-202620-10-2026
EPSS score0.72%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat4 products
- frr< 0:7.5.1-24.el8_10 | < 0:8.5.3-13.el9_8
- frr-debuginfo< 0:7.5.1-24.el8_10 | < 0:8.5.3-13.el9_8
- frr-debugsource< 0:7.5.1-24.el8_10 | < 0:8.5.3-13.el9_8
- frr-selinux< 0:7.5.1-24.el8_10 | < 0:8.5.3-13.el9_8
Ubuntu2 products
- frrAll versions (No fix recorded) | < 8.1-1ubuntu1.16 | < 8.4.4-1.1ubuntu6.7 | < 10.4.1-3ubuntu1.4 | < 10.5.1-1ubuntu4.1
- quaggaAll versions (No fix recorded)
Debian1 product
- frr< 8.4.4-1.1~deb12u2 | < 10.3-3+deb13u1 | < 10.6.0-2
Frrouting1 product
- frrouting10.0
4 vendors · 8 products
