BlackTreeIndependent security intelligence
← Back to the CVE catalogue
Full vulnerability report · 2026
CVE-2026-7771High confidence

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

IBM · Db2

5.5MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-45283

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
01

What, why and how

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.

What

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.

Why

A malformed condition prevents a loop from making progress or terminating, allowing resource exhaustion.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may disrupt the affected service.

What

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.

Why

A malformed condition prevents a loop from making progress or terminating, allowing resource exhaustion.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Loop with Unreachable Exit Condition ('Infinite Loop') → disrupt the affected service
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-835

CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop'). The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
UnauthenticatedDenial of serviceCWE-835
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2026-2415IBM DB2: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM DB2 ausnutzen, um einen Denial of Service Angriff durchzuführen, und um beliebigen Programmcode auszuführen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-1032Multiples vulnérabilités dans les produits IBM

CVERecord?id=CVE-2026-50645 Référence CVE CVE-2026-54225 https://www.cve.org/CVERecord?id=CVE-2026-54225 Référence CVE CVE-2026-5516 https://www.cve.org/CVERecord?id=CVE-2026-5516 Référence CVE CVE-2026-5588 https://www.cve.org/CVERecord?id=CVE-2026-5588 Référence CVE CVE-2026-5598 https://www.cve.org/CVERecord?id=CVE-2026-5598 Référence CVE CVE-2026-57819 https://www.cve.org/CVERecord?id=CVE-2026-57819 Référence CVE CVE-2026-60147 https://www.cve.org/CVERecord?id=CVE-2026-60147 Référence CVE CVE-2026-64958 https://www.cve.org/CVERecord?id=CVE-2026-64958 Référence CVE CVE-2026-7246 https://www.cve.org/CVERecord?id=CVE-2026-7246 Référence CVE CVE-2026-7771 https://www.cve.org/CVERecord?id=CVE-2026-7771 Référence CVE CVE-2026-8400 https://www.cve.org/CVERecord?id=CVE-2026-8400 Référence CVE CVE-2026-8646 https://www.cve.org/CVERecord?id=CVE-2026-8646 Référence CVE CVE-2026-9002 https://www.cve.org/CVERecord?id=CVE-2026-9002 Référence CVE CVE-2026-9071 https://www.cve.org/CVERecord?id=CVE-2026-9071 Référence CVE CVE-2026-9171 https://www.cve.org/CVERecord?id=CVE-2026-9171 Référence CVE CVE-2026-9320 https://www.cve.org/CVERecord?id=CVE-2026-9320 Référence CVE CVE-2026-9322 https://www.cve.org/CVERecord?id=CVE-2026-9322 Référence CVE CVE-2026-9375 https://www.cve.org/CVERecord?id=CVE-2026-9375 Ré

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0986Multiples vulnérabilités dans les produits IBM

ve.org/CVERecord?id=CVE-2026-5946 Référence CVE CVE-2026-60147 https://www.cve.org/CVERecord?id=CVE-2026-60147 Référence CVE CVE-2026-6051 https://www.cve.org/CVERecord?id=CVE-2026-6051 Référence CVE CVE-2026-6052 https://www.cve.org/CVERecord?id=CVE-2026-6052 Référence CVE CVE-2026-6053 https://www.cve.org/CVERecord?id=CVE-2026-6053 Référence CVE CVE-2026-6893 https://www.cve.org/CVERecord?id=CVE-2026-6893 Référence CVE CVE-2026-6914 https://www.cve.org/CVERecord?id=CVE-2026-6914 Référence CVE CVE-2026-6915 https://www.cve.org/CVERecord?id=CVE-2026-6915 Référence CVE CVE-2026-6938 https://www.cve.org/CVERecord?id=CVE-2026-6938 Référence CVE CVE-2026-7771 https://www.cve.org/CVERecord?id=CVE-2026-7771 Référence CVE CVE-2026-8053 https://www.cve.org/CVERecord?id=CVE-2026-8053 Référence CVE CVE-2026-8199 https://www.cve.org/CVERecord?id=CVE-2026-8199 Référence CVE CVE-2026-8200 https://www.cve.org/CVERecord?id=CVE-2026-8200 Référence CVE CVE-2026-8201 https://www.cve.org/CVERecord?id=CVE-2026-8201 Référence CVE CVE-2026-8202 https://www.cve.org/CVERecord?id=CVE-2026-8202 Référence CVE CVE-2026-8400 https://www.cve.org/CVERecord?id=CVE-2026-8400 Référence CVE CVE-2026-9171 https://www.cve.org/CVERecord?id=CVE-2026-9171 Référence CVE CVE-2026-9322 https://www.cve.org/CVERecord?id=CVE-2026-9322 Ré

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
11.5.0 ≤ 11.5.9; 12.1.0 ≤ 12.1.4
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 17 Jul 2026 · Last source change 21 Jul 2026, 02:03 UTC · CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-45283
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-7771 · cve.blacktree.nl