Quick answers
- Is CVE-2026-100892 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-100892 being exploited in the wild.
- How severe is CVE-2026-100892?
- Medium severity, with a CVSS score of 5.3, published 28 September 2026.
- Which products and versions are affected?
- Aligungr UERANSIM up to 3.3.0.
- Is there a fix for CVE-2026-100892?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-100892 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-100892?
- Check whether you run Aligungr UERANSIM at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A null pointer dereference vulnerability exists in the receiveUplinkInformationTransfer function within src/gnb/rrc/handler.cpp. When a malformed ULInformationTransfer message is received with a NULL dedicatedNASMessage field, the function dereferences this pointer without validation, triggering a SIGSEGV. The attack is network-initiated and requires no prior authentication, allowing remote denial of service of the nr-gnb component.
Affected products
- aligungr UERANSIM up to 3.3.0
Timeline
- 2026-09-28: disclosed: Vulnerability publicly disclosed on GitHub gist
- 2026-08-06: exploited: Proof of concept exploit demonstrated