CVE-2026-18299Network attack vector

Remote crash via rtpsbcdepay buffer misuse

Published Aug 20, 2026 · Updated Aug 21, 2026

Out-of-bounds read in rtpsbcdepay in GStreamer before 1.28.5 allows remote attackers to crash applications via crafted RTP packets. The depayloader parses the SBC-specific RTP payload header without verifying that payload data is present, then can pull from an empty reassembly adapter and leave a transferred GstBuffer pointer live instead of clearing it. On standard builds this produces critical warnings or a crash; with assertions disabled it also causes a GstBuffer use-after-free, but the vendor bounds the practical consequence to denial of service on network-reachable RTP streams.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in rtpsbcdepay in GStreamer before 1.28.5 allows remote attackers to crash applications via crafted RTP packets. The depayloader parses the SBC-specific RTP payload header without verifying that payload data is present, then can pull from an empty reassembly adapter and leave a transferred GstBuffer pointer live instead of clearing it. On standard builds this produces critical warnings or a crash; with assertions disabled it also causes a GstBuffer use-after-free, but the vendor bounds the practical consequence to denial of service on network-reachable RTP streams.

The record

CVE
CVE-2026-18299
Published
Aug 20, 2026
Updated
Aug 21, 2026
Vendor
GStreamer Project
Product
GStreamer
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=99fde1184fe8b12d0721230941c1bf2080913183

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GStreamer Project · GStreamerversion=99fde1184fe8b12d0721230941c1bf2080913183

Published CVSS scores

7.8ZDICVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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