by Kastro
Paper/Archive/CVE-2026-12665

CVE-2026-12665

IBM MQ Operator — IBM MQ Buffer Overflow

EPSS 0.3%CVSS 9.8
critical.is priorityof 100
34
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 24.4.244 × 204.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

IBM MQ could allow a remote attacker to execute arbitrary code due to a stack buffer overflow when processing TLS certificates with malformed distinguished names during channel connection establishment.

Affected

ProductAffectedFixed inSource
MQ Operator3.2.0 – 3.2.29–CNA
MQ Operator3.3.0 – < 3.4.03.4.0CNA
MQ Operator3.4.1–CNA
MQ Operator3.5.0–CNA
MQ Operator3.5.1 – 3.5.3–CNA
MQ Operator3.6.0 – 3.6.4–CNA
MQ Operator3.7.0 – 3.7.2–CNA
MQ Operator3.8.0–CNA
MQ Operator3.8.1–CNA
MQ Operator3.9.0–CNA
MQ Operator3.9.1–CNA
MQ Operator3.9.2–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
ibm (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

patchibm.com/support/pages/node/7292667