Out-of-bounds read in shairport-sync - #VU147257
Published: September 7, 2026
Vulnerability identifier: #VU147257
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information or cause a denial of service.
The vulnerability exists due to an out-of-bounds read in the AirPlay-2 session-key handling and audio-packet decryption functionality when processing an under-length "shk" session key in an AirPlay-2 SETUP request. A remote attacker can supply a session key shorter than 32 bytes and start realtime audio to disclose sensitive information or cause a denial of service.
Exploitation requires completing AirPlay-2 pairing.
Affected software
shairport-sync
Remediation
Install security update from vendor's website.
shairport-sync - update to 5.5