CVE-2026-37555Public exploit

Application crash via IMA ADPCM frame-count overflow

Published Apr 29, 2026 · Updated Apr 29, 2026

Integer overflow in libsndfile 1.2.2 IMA ADPCM handling allows attackers to crash applications that process a crafted WAV or W64 file. The WAV/W64 reader and write-close paths multiply attacker-controlled 32-bit samples-per-block and block-count values before assigning the result to the 64-bit sf.frames field. The demonstrated consequence is abnormal termination; out-of-bounds access depends on how the calling application uses the corrupted frame count.

CVSS severity7.5
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in libsndfile 1.2.2 IMA ADPCM handling allows attackers to crash applications that process a crafted WAV or W64 file. The WAV/W64 reader and write-close paths multiply attacker-controlled 32-bit samples-per-block and block-count values before assigning the result to the 64-bit sf.frames field. The demonstrated consequence is abnormal termination; out-of-bounds access depends on how the calling application uses the corrupted frame count.

The record

CVE
CVE-2026-37555
Published
Apr 29, 2026
Updated
Apr 29, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 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?

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

5.5Innora Security ResearchCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.2redhat-SADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
6.1Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/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-190Integer Overflow or Wraparound
T1204.002Malicious File
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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