aligungr UERANSIM nr-gnb encode.cpp DecodePlainMmMessage uncaught exception (CVE-2026-101035) | HOL Guard CVE

Medium · CVSS 6.9CVE-2026-101035

aligungr UERANSIM nr-gnb encode.cpp DecodePlainMmMessage uncaught exception

Answer in brief

CVE-2026-101035 records a Medium severity (CVSS 6.9) vulnerability in aligungr UERANSIM nr-gnb encode.cpp DecodePlainMmMessage uncaught exception. The current sources do not mark it as known exploited. The current feed maps aligungr/UERANSIM (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 28, 2026Updated Sep 28, 2026Source checked Sep 28, 2026First seen by HOL Sep 28, 2026Material review Sep 28, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.9
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps aligungr/UERANSIM (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
aligungr/UERANSIMgeneric	3.0 \|\| 3.1 \|\| 3.2 \|\| 3.3.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for aligungr/UERANSIM.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 28, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.