CVE-2026-82590 Open5GS SMF nudm-handler.c smf_nudm_sdm_handle_get assertion
Remote attackers can trigger a reachable assertion in Open5GS SMF via manipulated preemptCap arguments, causing a denial of service.
- 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-2026-82590?
CVE-2026-82590 is a medium-severity denial of service vulnerability in Open5GS, published on 30 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A weakness has been identified in Open5GS up to 2.7.7. The affected element is the function smf_nudm_sdm_handle_get of the file src/smf/nudm-handler.c of the component SMF. Executing a manipulation of the argument preemptCap can lead to reachable assertion. The attack may be launched remotely. Upgrading to version 2.8.0 is sufficient to fix this issue. This patch is called 4554405f29bffd7562abedbee63484825bd90cd5. You should upgrade the affected component.
Weakness: CWE-617
Which versions are affected by CVE-2026-82590?
How do I fix CVE-2026-82590?
No fix has been published for CVE-2026-82590 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-2026-82590 being exploited?
There is no known exploitation of CVE-2026-82590 in the wild and no public exploit code.
Sources
Also known as GHSA-j6j3-6vp7-w84j.