CVE-2023-38857Public exploit

Decoder crash via out-of-bounds sample-table read

Published Aug 15, 2023 · Updated Nov 26, 2024

Out-of-bounds read in FAAD2 2.10.1 allows local users to crash the faad decoder by opening a crafted MP4 file. The stcoin function in frontend/mp4read.c reads a four-byte sample-table entry immediately beyond an eight-byte heap allocation created by stscin while parsing the malformed file. Opening the file is required; the demonstrated result is an AddressSanitizer-detected abort, with no grounded evidence of code execution or data modification.

CVSS severity5.5
Medium
EPSS probability0.59%
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 FAAD2 2.10.1 allows local users to crash the faad decoder by opening a crafted MP4 file. The stcoin function in frontend/mp4read.c reads a four-byte sample-table entry immediately beyond an eight-byte heap allocation created by stscin while parsing the malformed file. Opening the file is required; the demonstrated result is an AddressSanitizer-detected abort, with no grounded evidence of code execution or data modification.

The record

CVE
CVE-2023-38857
Published
Aug 15, 2023
Updated
Nov 26, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 26, 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

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File

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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