CVE-2026-16931 IBM i is Affected By A Denial of Service Vulnerability []
Remote attackers can cause a denial of service on IBM i systems by sending zero-length TCP options, requiring patches for affected versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16931?
CVE-2026-16931 is a high-severity denial of service vulnerability in Ibm I, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to improper handling of zero-length TCP options.
Weakness: CWE-835
Which versions are affected by CVE-2026-16931?
It affects 1 product.
Products include Ibm I.
How do I fix CVE-2026-16931?
No fix has been published for CVE-2026-16931 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-16931 being exploited?
There is no known exploitation of CVE-2026-16931 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-mgmf-cpqx-c6qc.