CVE-2026-7183 Details
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.
A denial-of-service vulnerability has been identified in aligungr UERANSIM versions through 3.2.7. The issue arises in the Radio Link Simulation (RLS) layer, specifically within the function rls::DecodeRlsMessage in the file src/lib/rls/rls_pdu.cpp. The vulnerability is triggered by a malformed RLS packet that is sent to the gNodeB's RLS listener over UDP. The packet's declared PDU length can be manipulated to create a mismatch with the actual datagram size, leading to an uncaught exception. This exception propagates up the call stack, causing the gNodeB process to crash. The vulnerability can be exploited remotely, without authentication, by any host with UDP reachability to the gNodeB.
Upgrade to UERANSIM version 3.2.8, which includes a patch for this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 27, 2026CISA-ADP
Assessed Apr 28, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/aligungr/UERANSIM/ | [email protected] | ProductVendor |
| https://github.com/aligungr/UERANSIM/commit/ca1a66fffe282767bb08618af9f848e3b68ea47b | [email protected] | Source CodeVendor |
| https://github.com/aligungr/UERANSIM/releases/tag/v3.2.8 | [email protected] | Release NotesVendor |
| https://vuldb.com/submit/800026 | [email protected] | ExploitTechnical Description |
| https://vuldb.com/vuln/359784 | [email protected] | AdvisoryExploitRemedy |
| https://vuldb.com/vuln/359784/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-248 | Uncaught Exception | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| aligungr UERANSIM | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 27, 2026 | New CVE Received | [email protected] |