CVE-2026-101035 aligungr UERANSIM nr-gnb encode.cpp DecodePlainMmMessage uncaught exception
Remote attackers can cause a denial of service in UERANSIM nr-gnb by triggering an uncaught exception in the NAS message decoder.
- 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-2026-101035?
CVE-2026-101035 is a medium-severity denial of service vulnerability in aligungr UERANSIM, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw has been found in aligungr UERANSIM up to 3.3.0. This affects the function DecodePlainMmMessage in the library src/lib/nas/encode.cpp of the component nr-gnb. Executing a manipulation can lead to uncaught exception. The attack can be launched remotely. The exploit has been published and may be used. This patch is called 1ae9bf2062b57595dbcbc4bc1d0a0ccf06815bac. It is best practice to apply a patch to resolve this issue.
Weakness: CWE-248
Which versions are affected by CVE-2026-101035?
How do I fix CVE-2026-101035?
No fix has been published for CVE-2026-101035 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-2026-101035 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101035 exists.
Sources
Also known as GHSA-mc56-m68v-2mjr.