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CVE-2026-10535— IBM® Db2® is vulnerable to buffer overflow in setgid helper db2flacc which can lead to privilege escalation and instance compromise from an unprivileged shell

Quick assessment

Affected
IBM Db2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IBM DB2是美国IBM公司的一套关系型数据库管理系统。该系统的执行环境主要有UNIX、Linux、IBMi、z/OS以及Windows服务器版本。 IBM Db2 11.5.0版本至11.5.9版本和12.1.0版本至12.1.4版本存在缓冲区错误漏洞，该漏洞源于setgid helper db2flacc存在缓冲区溢出。

CVSS 8.4 · High EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
IBM Db2 11.5.0≤ 11.5.9 affected
12.1.0≤ 12.1.4 affected
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I. Basic Information for CVE-2026-10535

Vulnerability Information
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Vulnerability Title
IBM® Db2® is vulnerable to buffer overflow in setgid helper db2flacc which can lead to privilege escalation and instance compromise from an unprivileged shell
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
IBM Db2 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM DB2是美国IBM公司的一套关系型数据库管理系统。该系统的执行环境主要有UNIX、Linux、IBMi、z/OS以及Windows服务器版本。 IBM Db2 11.5.0版本至11.5.9版本和12.1.0版本至12.1.4版本存在缓冲区错误漏洞，该漏洞源于setgid helper db2flacc存在缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM Db2 11.5.0 ~ 11.5.9 cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-10535

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III. Intelligence Information for CVE-2026-10535

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Vendor Advisories for CVE-2026-10535 (1)

Same Patch Batch · IBM · 2026-07-30 · 35 CVEs total

CVE-2026-12946 9.9 CRITICAL Remote Code Execution in CUGA Component CodeAgent
CVE-2026-13435 9.9 CRITICAL Python Interpreter Sandbox Bypass Leading to Sensitive Data Exposure
CVE-2026-15435 9.8 CRITICAL IBM App Connect Enterprise is vulnerable to arbitrary file write vulnerability
CVE-2026-12943 9.8 CRITICAL This Power Hardware Management Console update is being released to address
CVE-2026-12118 9.8 CRITICAL IBM webMethods Integration could allow an unauthenticated remote attacker to execute arbit
CVE-2026-12940 9.8 CRITICAL Langflow is affected by remote code execution due to multiple unauthenticated and insuffic
CVE-2026-11707 9.3 CRITICAL Multiple vulnerabilities have been identified in IBM WebSphere Application Server shipped
CVE-2026-14522 8.8 HIGH IBM App Connect Enterprise is vulnerable to an arbitrary file read and arbitrary changes t
CVE-2026-11536 8.5 HIGH IBM WebSphere Application Server is affected by a remote code execution vulnerability
CVE-2026-11885 8.4 HIGH Power System update in Buffer Copy
CVE-2026-14980 8.3 HIGH IBM WebSphere Application Server Liberty is affected by a cross-site request forgery
CVE-2026-14519 7.5 HIGH IBM App Connect Enterprise is vulnerable to an arbitrary file read and arbitrary changes t
CVE-2024-25039 7.5 HIGH IBM Engineering Requirements Management DOORS and DOORS Web Access is affected by multiple
CVE-2026-10545 7.5 HIGH IBM Planning Analytics Local is affected by Open Redirect
CVE-2026-12733 7.5 HIGH IBM DataPower Gateway affected by denial of service
CVE-2026-12942 7.5 HIGH Langflow is affected by path traversal due to multiple unauthenticated and insufficiently
CVE-2026-9322 7.5 HIGH IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by
CVE-2026-10842 7.5 HIGH IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by
CVE-2026-16308 7.5 HIGH IBM Enterprise Build of Quarkus is affected by a DoS vulnerability
CVE-2026-11897 7.5 HIGH IBM WebSphere Application Server Liberty is affected by a denial of service vulnerability

Showing top 20 of 35 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Db2
Same vendor: IBM
Same weakness: CWE-121

V. Comments for CVE-2026-10535

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