CVE-2026-37457

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/FRRouting/frr/commit/0e6882bc72c0278988a47b2f0f73b7a91099a25c	Patch
https://access.redhat.com/errata/RHSA-2026:24340
https://access.redhat.com/errata/RHSA-2026:24347
https://access.redhat.com/errata/RHSA-2026:24370
https://access.redhat.com/errata/RHSA-2026:24371
https://access.redhat.com/security/cve/CVE-2026-37457
https://bugzilla.redhat.com/show_bug.cgi?id=2464548
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-37457.json

Configurations

Configuration 1 (hide)

cpe:2.3:a:frrouting:frrouting:10.0:-:*:*:*:*:*:*

History

30 Jun 2026, 03:19

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:24340 - () https://access.redhat.com/errata/RHSA-2026:24347 - () https://access.redhat.com/errata/RHSA-2026:24370 - () https://access.redhat.com/errata/RHSA-2026:24371 - () https://access.redhat.com/security/cve/CVE-2026-37457 - () https://bugzilla.redhat.com/show_bug.cgi?id=2464548 - () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-37457.json -

29 May 2026, 12:35

Type	Values Removed	Values Added
CPE		cpe:2.3:a:frrouting:frrouting:10.0:-::::::
References	~~() https://github.com/FRRouting/frr/commit/0e6882bc72c0278988a47b2f0f73b7a91099a25c -~~	() https://github.com/FRRouting/frr/commit/0e6882bc72c0278988a47b2f0f73b7a91099a25c - Patch
First Time		Frrouting frrouting Frrouting

01 May 2026, 19:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
CWE		CWE-787

01 May 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-01 18:16

Updated : 2026-07-15 02:20

NVD link : CVE-2026-37457

Mitre link : CVE-2026-37457

CVE.ORG link : CVE-2026-37457

JSON object : View

Products Affected

frrouting

frrouting

CWE

CWE-787

Out-of-bounds Write

{"id": "CVE-2026-37457", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-37457", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-01T18:15:57.207525Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}]}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "affectedData": [{"cpes": ["cpe:/o:redhat:enterprise_linux:10.2"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "versions": [{"status": "unaffected", "version": "0:10.4.4-1.el10_2", "lessThan": "*", "versionType": "rpm"}], "packageName": "frr", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "versions": [{"status": "unaffected", "version": "0:7.5.1-24.el8_10", "lessThan": "*", "versionType": "rpm"}], "packageName": "frr", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "versions": [{"status": "unaffected", "version": "0:10.4.3-3.el9_8", "lessThan": "*", "versionType": "rpm"}], "packageName": "frr10", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "versions": [{"status": "unaffected", "version": "0:8.5.3-13.el9_8", "lessThan": "*", "versionType": "rpm"}], "packageName": "frr", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}]}], "published": "2026-05-01T18:16:14.770", "references": [{"url": "https://github.com/FRRouting/frr/commit/0e6882bc72c0278988a47b2f0f73b7a91099a25c", "tags": ["Patch"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2026:24340", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:24347", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:24370", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:24371", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-37457", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464548", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-37457.json", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-787"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-07-15T02:20:44.463", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:frrouting:frrouting:10.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E800C2CB-4B1D-46D5-BA29-9C5D911708F7"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}