Risk Scores
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| IBM | Db2 |
Timeline
- Apr 16, 2026 CVE Published
=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3795 IBM Db2 is affected by a vulnerability in netty-codec-http-4.1.127 (CVE-2025-67735) 16 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Db2 Publisher: IBM Operating System: Linux Resolution: Patch/Upgrade CVE Names: CVE-2025-67735 Original Bulletin: https://www.ibm.com/support/pages/node/7269426 Comment: CVSS (Max): 6.5 CVE-2025-67735 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N) CVSS Source: IBM Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N EPSS (Max): 0.0% (7th) CVE-2025-67735 2026-04-15 - --------------------------BEGIN INCLUDED TEXT-------------------- IBM Support Document Information Document number : 7269426 Modified date : More support for: Db2 for Linux, UNIX and Windows Product : Db2 for Linux, UNIX and Windows Component : - Software version : 11.5.9 Operating system(s): Linux Security Bulletin Summary IBM Db2 is affected by a vulnerability in netty-codec-http-4.1.127 (CVE-2025-67735) Vulnerability Details CVEID: CVE-2025-67735 DESCRIPTION: Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.129.Final and 4.2.8.Final, the `io.netty.handler.codec.http.HttpRequestEncoder` has a CRLF injection with the request URI when constructing a request. This leads to request smuggling when `HttpRequestEncoder` is used without proper sanitization of the URI. Any application / framework using `HttpRequestEncoder` can be subject to be abused to perform request smuggling using CRLF injection. Versions 4.1.129.Final and 4.2.8.Final fix the issue. CWE: CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') CVSS Source: security-advisories@github.com CVSS Base score: 6.5 CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N) Affected Products and Versions +-------------------+---------------+-------------------+ |Affected Product(s)|Version(s) |Applicable Editions| +-------------------+---------------+-------------------+ |IBM Db2 |11.5.0 - 11.5.9|Server | +-------------------+---------------+-------------------+ Linux is affected. Unix and Windows are not affected. Earlier releases (11.1, 10.5, 10.1, 9.7 etc.) may also be affected, but they are no longer supported. Any older version not mentioned above is not supported. Remediation/Fixes Customers running any vulnerable affected level of an affected Program, V11.5, 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. They can be applied to any affected level of the appropriate release to remediate this vulnerability. +-------+------------+--------+-----------------------------------------------+ |Release|Fixed in mod|APAR |Download URL | | |pack | | | +-------+------------+--------+-----------------------------------------------+ |V11.5 |TBD |DT459113|Special Build #79671 or later for V11.5.9 | | | | |available at this link: | | | | |https://www.ibm.com/support/pages/node/7087189 | +-------+------------+--------+-----------------------------------------------+ 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. Workarounds and Mitigations None Published Security Vulnerabilities for DB2 for Linux, UNIX, and Windows including Special Build information Acknowledgement Change History 15 Apr 2026: Initial Publication *The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin. Disclaimer According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. 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| Vendor | Product | Versions |
|---|---|---|
| IBM | Db2 |