SB2026090725 - IBM DataStage on Cloud Pak for Data update for NLnet Labs Unbound
Published: September 7, 2026
Security Bulletin ID
SB2026090725
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Heap-based buffer overflow (CVE-ID: CVE-2026-42944)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow in the EDNS option encoder when processing queries containing multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options. A remote attacker can send a specially crafted query to cause a denial of service.
Only instances with the relevant EDNS options enabled are vulnerable.
Remediation
Install update from vendor's website.