CVE-2025-54957Known exploitationPublic exploitNetwork attack vector

Code execution via wrapped EMDF allocation size

Published Oct 20, 2025 · Updated Oct 20, 2025

Out-of-bounds write in Dolby UDC 4.5 through 4.13 allows remote attackers to execute code via a crafted DD+ bitstream. In evo heap allocation, a padding calculation wraps total_size to a small value while the copy loop remains bounded by attacker-controlled EMDF payload_length. Automatic audio-attachment decoding exposes Android devices without user interaction; other integrations are affected when a crafted stream reaches the DD+ decoder.

CVSS severity9.8
Critical
EPSS probability1.59%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Dolby UDC 4.5 through 4.13 allows remote attackers to execute code via a crafted DD+ bitstream. In evo heap allocation, a padding calculation wraps total_size to a small value while the copy loop remains bounded by attacker-controlled EMDF payload_length. Automatic audio-attachment decoding exposes Android devices without user interaction; other integrations are affected when a crafted stream reaches the DD+ decoder.

The record

CVE
CVE-2025-54957
Published
Oct 20, 2025
Updated
Oct 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, CWE-190, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 20, 2025Record updatedLatest update available in the CVE record.
  3. Jan 14, 2026Exploitation reportedPixel 9 zero-click exploit chain

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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-190Integer Overflow or Wraparound
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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