SIPSorcery: Malformed UDP packet on the RTP/ICE socket can remotely terminate a media session (DoS) (CVE-2026-54632) | HOL Guard CVE

High severityCVE-2026-54632GHSA-28GM-JRMW-XX93

SIPSorcery: Malformed UDP packet on the RTP/ICE socket can remotely terminate a media session (DoS)

Answer in brief

CVE-2026-54632 records a High severity vulnerability in SIPSorcery: Malformed UDP packet on the RTP/ICE socket can remotely terminate a media session (DoS). The current sources do not mark it as known exploited. The current feed maps sipsorcery-org/sipsorcery (generic), SIPSorcery (nuget). 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 14, 2026Updated Sep 15, 2026Source checked Sep 17, 2026First seen by HOL Aug 2, 2026Material review Sep 15, 2026

Upstream Advisory

Key facts

Risk: High
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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 sipsorcery-org/sipsorcery (generic), SIPSorcery (nuget). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
sipsorcery-org/sipsorcerygeneric	< 10.0.9	Not reported
SIPSorcerynuget	<=10.0.8	10.0.9

Recommended response

Check inventory. Check lockfiles and deployed manifests for sipsorcery-org/sipsorcery, SIPSorcery.
Review the reported fix. Update SIPSorcery to 10.0.9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 2, 2026

Sources and claim methodology

Upstream source description

SIPSorcery is a WebRTC, SIP, and VoIP library for C# and .NET. Prior to 10.0.9, RTPChannel.OnRTPPacketReceived and the STUNAttribute.ParseMessageAttributes, STUNXORAddressAttribute, and STUNAddressAttribute parsing path index untrusted bytes without sufficient length checks, while UdpReceiver.EndReceiveFrom closes the channel when those operations raise a non-socket exception. A remote party can send a single short RTP packet or malformed zero-to-seven-byte STUN address attribute to the shared RTP/ICE socket, including during ICE connectivity checks before DTLS or STUN MESSAGE-INTEGRITY verification, and terminate the active RTP or WebRTC media session. The attacker must reach or learn the advertised ephemeral RTP/ICE port, but no authentication or user interaction is required, and the impact is limited to availability. This issue is fixed in version 10.0.9.

Quoted source text, attributed separately from HOL analysis.