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VulnerabilityPublished Updated

CVE-2025-36123: IBM Db2 for Linux, UNIX and Windows · Unthrottled Resource Allocation

Affects IBM Db2 for Linux, UNIX and WindowsSource CVE Database V5

0

Not known to be exploited · CVSS 6.2 Medium.

Data as of 26 Oct 2026, 15:59 UTC

CVSS 3.1 base score
6.2Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Jan 2026

  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
IBMDb2 for Linux, UNIX and WindowsAffected
  • >=11.5.0 <=11.5.9
  • >=12.1.0 <=12.1.3
Fixed in–

CPE configurations (20)

  • cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:linux:*:*
  • cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:unix:*:*
  • cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:aix:*:*
  • cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:windows:*:*
  • cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:zos:*:*
  • cpe:2.3:a:ibm:db2:11.5.9:*:*:*:*:linux:*:*

AI-suggested

  1. Monitor and restrict local user access to IBM Db2 servers to trusted personnel only, minimizing the risk of exploitation by unauthorized local users.
  2. Implement resource usage monitoring and alerting on database servers to detect abnormal spikes in CPU, memory, or I/O that may indicate exploitation attempts.
  3. Apply any IBM patches or updates addressing this vulnerability as soon as they become available.
  4. Consider configuring database resource governor or workload management features to limit resource consumption during large data operations, especially involving XML data.
  5. Conduct regular audits of database operations involving large XML tables to identify and optimize potentially resource-intensive queries or processes.
  6. Employ network segmentation and access controls to limit lateral movement and reduce the likelihood of local access by untrusted users.
  7. Prepare incident response plans to quickly address denial of service conditions affecting database availability.

Description

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.

References

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