CVE-2026-33851

Memory corruption via FAAD bounds-check failures

Published Mar 24, 2026 · Updated Mar 24, 2026

Buffer overflows in DOSLIB before doslib-20250729 allow local users to corrupt memory by processing crafted AAC data. In ext/faad, faad_resetbits subtracts a word offset from buffer_size without preventing unsigned underflow, while excluded_channels writes beyond exclude_mask when channel entries exceed MAX_CHANNELS. Exploitation requires user interaction with attacker-supplied audio and can crash the consuming program or corrupt its data.

CVSS severity7.8
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflows in DOSLIB before doslib-20250729 allow local users to corrupt memory by processing crafted AAC data. In ext/faad, faad_resetbits subtracts a word offset from buffer_size without preventing unsigned underflow, while excluded_channels writes beyond exclude_mask when channel entries exceed MAX_CHANNELS. Exploitation requires user interaction with attacker-supplied audio and can crash the consuming program or corrupt its data.

The record

CVE
CVE-2026-33851
Published
Mar 24, 2026
Updated
Mar 24, 2026
Vendor
Jonathan Campbell
Product
DOSLIB
Classifications
CWE-119, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 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?

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  1. Affected versionversion=0 <doslib-20250729

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Jonathan Campbell · DOSLIBversion=0 <doslib-20250729

Published CVSS scores

7.8GovTech CSGCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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