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VulnerabilityPublished

CVE-2025-36136: IBM Db2 · Unthrottled Resource Allocation

Affects IBM Db2Source CVE Database V5

0

Not known to be exploited · CVSS 5.1 Medium.

Data as of 26 Oct 2026, 15:59 UTC

CVSS 3.1 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 Nov 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
IBM Db2Affected
  • =11.5.0
  • =12.1.0
Fixed in–

AI-suggested

To mitigate CVE-2025-36136, European organizations should: 1) Monitor IBM security advisories closely and apply patches or updates as soon as IBM releases them for affected Db2 versions. 2) Restrict local access to Db2 servers strictly, employing strong access controls and monitoring to prevent unauthorized local user activity. 3) Implement resource usage monitoring and alerting on Db2 instances to detect abnormal resource consumption patterns indicative of exploitation attempts. 4) Use system-level resource limits (e.g., cgroups on Linux) to constrain the maximum resources any single process or user can consume, reducing the risk of resource exhaustion. 5) Conduct regular audits of database monitor scripts and configurations to ensure they operate correctly and do not misinterpret instance states. 6) Consider upgrading to later Db2 versions not affected by this vulnerability if feasible. 7) Employ network segmentation and host-based intrusion detection to limit lateral movement and local access by potential attackers. These steps go beyond generic advice by focusing on controlling local access, monitoring resource usage, and preparing for rapid patch deployment.

Description

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.3 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local user to cause a denial of service due to the database monitor script incorrectly detecting that the instance is still starting under specific conditions.

References

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