CVE-2025-63648Public exploitNetwork attack vector

Unauthenticated service crash via malformed DACP move request

Published Jan 20, 2026 · Updated Jan 20, 2026

NULL pointer dereference in OwnTone through commit b7e385f allows remote attackers to crash the server with a crafted DACP request. The dacp_reply_playqueueedit_move handler adds one to an unchecked strchr result before passing it to safe_atoi32; a missing colon yields address 1 and strtol segfaults. An unauthenticated network client that can reach the DACP endpoint can terminate the OwnTone process, interrupting media service until it restarts.

CVSS severity7.5
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in OwnTone through commit b7e385f allows remote attackers to crash the server with a crafted DACP request. The dacp_reply_playqueueedit_move handler adds one to an unchecked strchr result before passing it to safe_atoi32; a missing colon yields address 1 and strtol segfaults. An unauthenticated network client that can reach the DACP endpoint can terminate the OwnTone process, interrupting media service until it restarts.

The record

CVE
CVE-2025-63648
Published
Jan 20, 2026
Updated
Jan 20, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 20, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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