CVE-2020-13428

Code execution via invalid packetizer payload size

Published Jun 8, 2020 · Updated Aug 4, 2024

Heap-based buffer overflow in VideoLAN VLC media player before 3.0.11 allows remote attackers to execute code via crafted H.264 media. In hxxx_AnnexB_to_xVC, a reallocation optimization calculates payload size by comparing offsets from different buffers, producing an invalid size and an out-of-bounds write. The vulnerable path is limited to macOS/iOS VideoToolbox decoding and requires the target user to open a crafted file or stream; a crash is the most likely result, while code runs with that user's privileges.

CVSS severity7.8
High
EPSS probability2.41%
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 VideoLAN VLC media player before 3.0.11 allows remote attackers to execute code via crafted H.264 media. In hxxx_AnnexB_to_xVC, a reallocation optimization calculates payload size by comparing offsets from different buffers, producing an invalid size and an out-of-bounds write. The vulnerable path is limited to macOS/iOS VideoToolbox decoding and requires the target user to open a crafted file or stream; a crash is the most likely result, while code runs with that user's privileges.

The record

CVE
CVE-2020-13428
Published
Jun 8, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 8, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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 vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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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