CVE-2026-7183 aligungr UERANSIM Radio Link Simulation Layer rls_pdu.cpp DecodeRlsMessage uncaught exception
Remote attackers can cause a denial of service in UERANSIM by triggering an uncaught exception in the Radio Link Simulation Layer.
- 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-2026-7183?
CVE-2026-7183 is a medium-severity denial of service vulnerability in aligungr UERANSIM, published on 27 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been found in aligungr UERANSIM up to 3.2.7. The affected element is the function rls::DecodeRlsMessage in the library src/lib/rls/rls_pdu.cpp of the component Radio Link Simulation Layer. The manipulation of the argument pduLength leads to uncaught exception. The attack may be initiated remotely. Upgrading to version 3.2.8 is sufficient to fix this issue. The identifier of the patch is ca1a66fffe282767bb08618af9f848e3b68ea47b. It is suggested to upgrade the affected component. This behavior is related to CVE-2024-37877. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Weakness: CWE-248
Which versions are affected by CVE-2026-7183?
How do I fix CVE-2026-7183?
No fix has been published for CVE-2026-7183 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-2026-7183 being exploited?
There is no known exploitation of CVE-2026-7183 in the wild and no public exploit code.
Sources
Also known as GHSA-pq9f-h5gq-3577.