Integer underflow in Netatalk - CVE-2026-45356
Published: July 12, 2026
Vulnerability identifier: #VU137328
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45356
CWE-ID: CWE-191
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Netatalk
Affected software:
Netatalk
Netatalk
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to integer underflow in sl_unpack_loop when processing Spotlight RPC array elements with an attacker-controlled subcount value. A remote user can send a specially crafted Spotlight RPC request to disclose sensitive information.
The out-of-bounds data read from heap memory is stored in dalloc structures and returned to the client in the Spotlight RPC response.
How to mitigate CVE-2026-45356
Install security update from vendor's website.