Stack-based buffer overflow in Netatalk - #VU137334
Published: July 12, 2026
Vulnerability identifier: #VU137334
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Netatalk
Affected software:
Netatalk
Netatalk
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to a stack-based buffer overflow in convert_charset() when processing filenames with decomposable Unicode characters. A remote attacker can supply a specially crafted filename to execute arbitrary code.
The issue is triggered by type confusion that uses a byte count as a ucs2_t array index for null termination, causing a write at double the intended offset.
Remediation
Install security update from vendor's website.