Improper Handling of Length Parameter Inconsistency in Netatalk - CVE-2026-62320
Published: November 11, 2026
Vulnerability identifier: #VU165947
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-62320
CWE-ID: CWE-130
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to smuggle attacker-controlled DSI requests into the same connection.
The vulnerability exists due to improper handling of length parameter inconsistency in Netatalk afpd's dsi_tcp_open() when processing frames whose declared dsi_len exceeds server_quantum, silently truncating reads without rejecting the frame or draining remaining bytes. A remote attacker can send an oversized DSI frame containing embedded frames to make subsequent receive operations interpret leftover payload bytes as new requests.
Affected software
Netatalk
How to mitigate CVE-2026-62320
Install security update from vendor's website.
Netatalk - update to 4.5.1