What is CVE-2026-11375?

CVE-2026-11375 is a high-severity vulnerability in IBM Mq, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-09-18.

How severe is CVE-2026-11375?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in IBM Mq

CVE-2026-11375

IBM MQ could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to a stack buffer overflow when processing XA transaction identifiers.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ibm Mq — versions 10.0.0.0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-11375?: CVE-2026-11375 is a high-severity vulnerability in IBM Mq, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-09-18.
How severe is CVE-2026-11375?: High severity. CVSS v3 base score is 8.8 out of 10.