CVE-2025-36123: IBM Db2 for Linux, UNIX and Windows · Unthrottled Resource Allocation
Affects IBM Db2 for Linux, UNIX and WindowsSource CVE Database V5
Not known to be exploited · CVSS 6.2 Medium.
Data as of 26 Oct 2026, 15:59 UTC
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 30 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| IBMDb2 for Linux, UNIX and Windows | Affected
| 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
- Monitor and restrict local user access to IBM Db2 servers to trusted personnel only, minimizing the risk of exploitation by unauthorized local users.
- Implement resource usage monitoring and alerting on database servers to detect abnormal spikes in CPU, memory, or I/O that may indicate exploitation attempts.
- Apply any IBM patches or updates addressing this vulnerability as soon as they become available.
- Consider configuring database resource governor or workload management features to limit resource consumption during large data operations, especially involving XML data.
- Conduct regular audits of database operations involving large XML tables to identify and optimize potentially resource-intensive queries or processes.
- Employ network segmentation and access controls to limit lateral movement and reduce the likelihood of local access by untrusted users.
- 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.