What is CVE-2025-36123?

CVE-2025-36123 is a medium-severity vulnerability in IBM Db2, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.2/10. Published 2026-01-30.

How severe is CVE-2025-36123?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Resource exhaustion in IBM Db2

CVE-2025-36123

IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 - 11.5.9 and 12.1.0 - 12.1.3 could allow a local user to cause a denial of service when copying large table containing XML data due to improper allocation of system resources.

Published 2026-01-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (3.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000

Affected products

IBM Db2
IBM Db2 For Linux, Unix And Windows — versions 11.5.0, 12.1.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

www.ibm.com/support/pages/node/7257627 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-36123?: CVE-2025-36123 is a medium-severity vulnerability in IBM Db2, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.2/10. Published 2026-01-30.
How severe is CVE-2025-36123?: Medium severity. CVSS v3 base score is 6.2 out of 10.