IBM i 7.6/7.5/7.4/7.3 LPD Queue Name Parser Off-by-One Write Causes DoS
CVE-2026-17469 Published on September 4, 2026
IBM i is Affected By Denial of Service Vulnerabilities in Line Printer Daemon [, ]
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local authenticated attacker to cause a denial of service due to an off-by-one write in the LPD queue name parser.
Vulnerability Analysis
CVE-2026-17469 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a small impact on availability.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-17469 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-17469
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Affected Versions
IBM i:- Version 7.6 is affected.
- Version 7.5 is affected.
- Version 7.4 is affected.
- Version 7.3 is affected.