CVE-2026-6730

IBM Concert 1.0.0 through 3.0.0 is vulnerable to a buffer overflow, caused by improper bounds checking. A local user could overflow the buffer and execute arbitrary code on the system.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.ibm.com/support/pages/node/7288830	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:ibm:concert:*:*:*:*:*:*:*:*

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*

History

28 Sep 2026, 20:47

Type	Values Removed	Values Added
References	~~() https://www.ibm.com/support/pages/node/7288830 -~~	() https://www.ibm.com/support/pages/node/7288830 - Vendor Advisory
First Time		Ibm Ibm concert Linux Linux linux Kernel
CPE		cpe:2.3:o:linux:linux_kernel:-:::::::* cpe:2.3:a:ibm:concert::::::::

23 Sep 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-23 21:17

Updated : 2026-09-28 20:47

NVD link : CVE-2026-6730

Mitre link : CVE-2026-6730

CVE.ORG link : CVE-2026-6730

JSON object : View

Products Affected

ibm

concert

linux

linux_kernel

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

{"id": "CVE-2026-6730", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-6730", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-24T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "psirt@us.ibm.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "psirt@us.ibm.com", "affectedData": [{"cpes": ["cpe:2.3:a:ibm:concert:1.0.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:concert:3.0.0:*:*:*:*:*:*:*"], "vendor": "IBM", "product": "Concert", "versions": [{"status": "affected", "version": "1.0.0", "versionType": "semver", "lessThanOrEqual": "3.0.0"}]}]}], "published": "2026-09-23T21:17:02.053", "references": [{"url": "https://www.ibm.com/support/pages/node/7288830", "tags": ["Vendor Advisory"], "source": "psirt@us.ibm.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "psirt@us.ibm.com", "description": [{"lang": "en", "value": "CWE-120"}]}], "descriptions": [{"lang": "en", "value": "IBM Concert 1.0.0 through 3.0.0 is vulnerable to a buffer overflow, caused by improper bounds checking. A local user could overflow the buffer and execute arbitrary code on the system."}], "lastModified": "2026-09-28T20:47:20.347", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ibm:concert:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F935EDBC-29BC-4CEB-8149-DD294B37307D", "versionEndIncluding": "3.0.0", "versionStartIncluding": "1.0.0"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "psirt@us.ibm.com"}