CVE-2026-30999Network attack vector

Process interruption via unreleased input buffer

Published Apr 13, 2026 · Updated Apr 13, 2026

Memory exhaustion in FFmpeg 8.0.1 zmqsend allows attackers to interrupt the process by supplying a crafted input stream. The tool finalizes an unlimited AVBPrint input buffer into src_buf but exits without freeing that allocation; upstream identifies the defect as a memory leak, not the heap overflow described by the CVE record. Exploitation requires the crafted data to reach the standalone zmqsend tool, and the demonstrated consequence is limited to availability of that process.

CVSS severity7.5
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory exhaustion in FFmpeg 8.0.1 zmqsend allows attackers to interrupt the process by supplying a crafted input stream. The tool finalizes an unlimited AVBPrint input buffer into src_buf but exits without freeing that allocation; upstream identifies the defect as a memory leak, not the heap overflow described by the CVE record. Exploitation requires the crafted data to reach the standalone zmqsend tool, and the demonstrated consequence is limited to availability of that process.

The record

CVE
CVE-2026-30999
Published
Apr 13, 2026
Updated
Apr 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-122, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 13, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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