CVE-2026-17259 IBM i is Affected By Multiple Vulnerabilities in Debug Server
A remote authenticated attacker can cause a denial of service via a stack-based buffer overflow in the IBM i Debug Server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-17259?
CVE-2026-17259 is a medium-severity memory corruption vulnerability in Ibm I, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to cause a denial of service due to a stack-based buffer overflow.
Weakness: CWE-121
Which versions are affected by CVE-2026-17259?
It affects 1 product.
Products include Ibm I.
How do I fix CVE-2026-17259?
No fix has been published for CVE-2026-17259 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-17259 being exploited?
There is no known exploitation of CVE-2026-17259 in the wild and no public exploit code.
Other vulnerabilities in Ibm I
- CVE-2026-96119 IBM i is Affected By An Improper Control of Code Generation Vulnerability in HTTP Server Administration GUI
- CVE-2026-16860 IBM i is Affected By Remote Code Execution Vulnerability []
- CVE-2026-17083 IBM i is Affected By Multiple Vulnerabilities in the Debug Server
- CVE-2026-17218 IBM i is Affected By Remote Code Execution Vulnerability in Line Printer Daemon []
- CVE-2026-17276 IBM i is Affected By Multiple Vulnerabilities in Navigator for i
Sources
Also known as GHSA-2w8m-jj3m-r3p3.