CVE-2025-25473Network attack vector

Memory leak via uncleared muxer packet queue

Published Feb 18, 2025 · Updated Dec 16, 2025

Memory leak in FFmpeg git master before commit c08d30 allows remote attackers to consume memory through a failed muxing process. The avformat_free_context cleanup path omits the FFFormatContext packet_buffer, leaving queued packets allocated when muxing fails. Reachability requires a muxing failure while packets remain queued; the public record identifies no specific triggering input or resulting service interruption.

CVSS severity5.3
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Memory leak in FFmpeg git master before commit c08d30 allows remote attackers to consume memory through a failed muxing process. The avformat_free_context cleanup path omits the FFFormatContext packet_buffer, leaving queued packets allocated when muxing fails. Reachability requires a muxing failure while packets remain queued; the public record identifies no specific triggering input or resulting service interruption.

The record

CVE
CVE-2025-25473
Published
Feb 18, 2025
Updated
Dec 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 2025Record 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

5.3CISA ADP VulnrichmentCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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-476NULL Pointer Dereference

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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