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CVE-2026-7771

IBM® Db2® is vulnerable to a trap when compiling specially crafted statements containing subqueries could lead to a denial of service

Description

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a trap when compiling a specially crafted statements containing subqueries could lead to a denial of service.

Timeline

  1. ID reserved

    By ibm

  2. · 2 months later

    Published

  3. · 4 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-7771, by who scored it
Scored byCVSSScoreVector
ibmCNA (assigner)3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVDNVD · Analyzed3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.15% · top 96% of all CVEs (11 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Affected products

  • IBM · Db2

    • affected 11.5.0 – ≤ 11.5.9
    • affected 12.1.0 – ≤ 12.1.4

What to do

Solution: Customers running any vulnerable modpack level of an affected Program,V11.5, and V12.1, can download the special build containing the interim fix for this issue from Fix Central. These special builds are available based on the most recent level for each impacted release: V11.5.9, and V12.1.4. They can be applied to any affected level of the appropriate release to remediate this vulnerability. ReleaseFixed in mod packAPARDownload URL V11.5 TBD https://www.ibm.com/support/pages/node/7087189 V12.1 12.1.5 https://www.ibm.com/support/pages/node/7267513 IBM does not disclose key Db2 functionality nor replication steps for a vulnerability to avoid providing too much information to any potential malicious attacker. IBM does not want to enable a malicious attacker with sufficient knowledge to craft an exploit of the vulnerability.

Workaround: Ensure that the query is applying the predicates as intended.

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .