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CVE-2025-36009· NVD / CVE Program· CNA ibm

IBM Db2 Denial of Service

IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow an authenticated user to cause a denial of service due to excessive use of a global variable.

MediumCVSS 6.5 · v3.1—No exploit No fix recorded
Published
Jan 30, 2026
Updated
Jun 17, 2026
EPSS
0.4% · 30th percentile
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Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · ibm
6.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
ibmdb2

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • ibm db211.5.0 and later · up to 11.5.9 inclusive
  • ibm db212.1.0 and later · up to 12.1.3 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (ibm). Independent of NVD's CPE analysis and usually ahead of it.

  • IBM Db2 for Linux, UNIX and Windows

    • 11.5.0 and later · up to and including 11.5.9affected · semver
    • 12.1.0 and later · up to and including 12.1.3affected · semver

Same product

ibm: all records

Other highest-scoring records for the same primary product.

  • CVE-2007-2582Multiple buffer overflows in the DB2 JDBC Applet Server (DB2JDS) service in IBM DB2 9.x and earlier allow remote attackers to (1) execute ar
    48Plan
  • CVE-2010-3731Stack-based buffer overflow in the validateUser implementation in the com.ibm.db2.das.core.DasSysCmd function in db2dasrrm in the DB2 Admini
    43Plan
  • CVE-2010-3193Unspecified vulnerability in the DB2STST program in IBM DB2 9.1 before FP9, 9.5 before FP6, and 9.7 before FP2 has unknown impact and attack
    41Plan
  • CVE-2009-4335Multiple unspecified vulnerabilities in bundled stored procedures in the Spatial Extender component in IBM DB2 9.5 before FP5 have unknown i
    41Plan
  • CVE-2009-3473IBM DB2 9.1 before FP8 does not require the SETSESSIONUSER privilege for the SET SESSION AUTHORIZATION statement, which has unspecified impa
    41Plan
  • CVE-2008-6821Buffer overflow in the DAS server in IBM DB2 8 before FP17, 9.1 before FP5, and 9.5 before FP2 might allow attackers to execute arbitrary co
    41Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-364240 days apartIBM Db2 Denial of Service
    26Monitor
  • CVE-2025-364270 days apartIBM Db2 Denial of Service
    26Monitor
  • CVE-2025-1386718 days apartIBM Db2 Denial of Service
    26Monitor
  • CVE-2025-1468918 days apartIBM Db2 Denial of Service
    26Monitor
  • CVE-2026-135282 days apartIBM® Db2® is vulnerable to a trap or return SQLCODE -901 when compiling a specially crafted query with a defined index
    26Monitor
  • CVE-2026-157790 days apartIBM® Db2® is vulnerable to a denial of service with a specially crafted query involving multiple subqueries
    26Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-1284 · Improper Validation of Specified Quantity in Input

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records