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CVE-2026-37457

33
FAUCET Score

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.

First published: May 1, 2026Last modified: May 1, 2026

Impacted Technologies

VendorProductVersion(s)CPE
10.0CPE matchmatch criteria
cpe:2.3:a:frrouting:frrouting:10.0:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 11th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 21317-17084Fixed in: 10.5.4-1
microsoftpatch availablevia msrc
Product: 21417-17084Fixed in: 10.5.4-1
microsoftpatch availablevia msrc
Product: azl3 frr 10.5.0-3 on Azure Linux 3.0Fixed in: 10.5.4-1
microsoftpatch availablevia msrc
Product: azl3 frr 10.5.4-1 on Azure Linux 3.0Fixed in: 10.5.4-1

Vendor Advisories (1)

microsoft2026-May/CVE-2026-37457Important

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.

May 2, 2026

References

access.redhat.com / errata/RHSA-2026:24340
access.redhat.com / errata/RHSA-2026:24347
access.redhat.com / errata/RHSA-2026:24370
access.redhat.com / errata/RHSA-2026:24371
access.redhat.com / security/cve/CVE-2026-37457
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-37457.json
github.com / FRRouting/frr/commit/0e6882bc72c0278988a47b2f0f73b7a91099a25c
Patch