CVE-2023-49501Public exploit

Local code execution via heap buffer overflow

Published Apr 19, 2024 · Updated Nov 4, 2025

Heap-based buffer overflow in FFmpeg n6.1-3-g466799d4f5 allows local users to execute arbitrary code through config_eq_output. Public records identify libavfilter/asrc_afirsrc.c at line 495 but do not disclose which calculation or write exceeds the heap allocation. Exploitation requires local invocation of the affected filter path and can corrupt the FFmpeg process, enabling code execution in that process context.

CVSS severity8.0
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in FFmpeg n6.1-3-g466799d4f5 allows local users to execute arbitrary code through config_eq_output. Public records identify libavfilter/asrc_afirsrc.c at line 495 but do not disclose which calculation or write exceeds the heap allocation. Exploitation requires local invocation of the affected filter path and can corrupt the FFmpeg process, enabling code execution in that process context.

The record

CVE
CVE-2023-49501
Published
Apr 19, 2024
Updated
Nov 4, 2025
Vendor
FFmpeg
Product
FFmpeg
Classifications
CWE-122, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=-

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

FFmpeg · FFmpegversion=-

Published CVSS scores

8.0CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1203Exploitation for Client Execution

Public exploit references

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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