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VulnerabilityPublished

CVE-2026-113698: IBM Db2 · Stack-based Buffer Overflow

Affects IBM Db2Source CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium.

Data as of 8 Nov 2026, 17:04 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (ibm)CVSS 3.16.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: 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 8 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
IBMDb2Affected
  • >=11.5.0 <=11.5.9
  • >=12.1.0 <=12.1.5
Fixed in–

CPE configurations (4)

  • cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:db2:11.5.9:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:db2:12.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:db2:12.1.5:*:*:*:*:*:*:*

AI-suggested

Until a fix is available, avoid executing untrusted or specially crafted queries involving Materialized Query Tables.

Description

A stack-based buffer overflow vulnerability (CWE-121) exists in IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5. This flaw can be triggered by executing a specially crafted query involving a Materialized Query Table, resulting in a denial of service condition.

References

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