CVE-2026-10535
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Buffer Overflow in IBM Db2

Publication date: 2026-07-30

Last updated on: 2026-07-31

Assigner: IBM Corporation

Description
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to buffer overflow in setgid helper db2flacc.

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Meta Information

Published
2026-07-30
Last Modified
2026-07-31
Generated
2026-07-31
AI Q&A
2026-07-31
EPSS Evaluated
N/A
NVD
CVE-2026-10535
EUVD
EUVD-2026-51250

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
ibm db2 From 11.5.0 (inc) to 11.5.9 (inc)
ibm db2 From 12.1.0 (inc) to 12.1.4 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

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Executive Summary

IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.4 have a buffer overflow vulnerability in the setgid helper program named db2flacc. This flaw could allow an attacker to execute arbitrary code or cause a denial of service by exploiting improper memory handling in the helper.

Detection Guidance

To detect this vulnerability, check for the presence of IBM Db2 versions 11.5.0 through 11.5.9 or 12.1.0 through 12.1.4. Use commands like 'db2level' to verify the installed version. Inspect the setgid helper 'db2flacc' for potential buffer overflow issues.

Impact Analysis

If exploited, this vulnerability could allow an attacker to gain elevated privileges on the system running the vulnerable Db2 software. This may lead to unauthorized access, data theft, or disruption of database services. Systems with Db2 installed are at risk if not patched.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate compliance requirements under GDPR, HIPAA, or other regulations. Organizations must address this flaw to maintain data protection and security standards.

Mitigation Strategies

Apply the latest IBM Db2 patch to upgrade to a version beyond 11.5.9 or 12.1.4. Remove setgid permissions from the db2flacc helper if not required. Monitor IBM security advisories for updates.

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