CVE-2026-79831 HPE NonStop Posix User Threads - Heap buffer overflow vulnerability
A heap buffer overflow in HPE NonStop Posix User Threads allows attackers to execute arbitrary code on the system.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-79831?
CVE-2026-79831 is a medium-severity memory corruption vulnerability in Hewlett Packard Enterprise HPE NonStop Posix User Threads, published on 15 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A heap buffer overflow in HPE NonStop Posix User Threads may allow arbitrary code execution.
Weakness: CWE-122
Which versions are affected by CVE-2026-79831?
How do I fix CVE-2026-79831?
No fix has been published for CVE-2026-79831 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-2026-79831 being exploited?
There is no known exploitation of CVE-2026-79831 in the wild and no public exploit code.
Sources
Also known as GHSA-5wpv-46m6-vrc3.