What is CVE-2026-6928?

CVE-2026-6928 is a critical-severity vulnerability in IBM Concert, classified under Use After Free. CVSS score: 9.8/10. Published 2026-09-23.

How severe is CVE-2026-6928?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Use After Free in IBM Concert

CVE-2026-6928

IBM Concert 1.0.0 through 3.0.0 references or accesses memory after it has been freed. This allows an attacker who can influence program execution or input may exploit this condition to corrupt memory, cause application crashes, or execute arbitrary code.

Vulnerability class: Use-After-Free

Published 2026-09-23.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

IBM Concert

Weakness classification (CWE)

CWE-416 — Use After Free

References

www.ibm.com/support/pages/node/7288830 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-6928?: CVE-2026-6928 is a critical-severity vulnerability in IBM Concert, classified under Use After Free. CVSS score: 9.8/10. Published 2026-09-23.
How severe is CVE-2026-6928?: Critical severity. CVSS v3 base score is 9.8 out of 10.