CVE-2026-45698
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
Netatalk versions 3.1.19 through 4.4.2 contain a stack-based buffer overflow in the deletedir() function of the afpd daemon due to an integer underflow in the calculation of the remaining buffer size used for path construction. This allows unauthenticated attackers to perform an unbounded strcpy() operation with attacker-controlled filenames into a nearly full stack buffer. Version 4.4.3 patches the issue.
Risk Assessment
The risk includes remote code execution or denial of service, which could compromise file system integrity and availability of file services.
Recommendation
It is recommended to immediately upgrade Netatalk to version 4.4.3 or later to eliminate the vulnerability.
Original NVD description (English source)
Netatalk is a Free and Open Source file server suite for Unix-like operating systems. In versions 3.1.19 through 4.4.2, a stack-based buffer overflow exists in the deletedir() function of Netatalk's afpd daemon due to an integer underflow in the calculation of the remaining buffer size used for path construction. deletedir() is a utility function called when a file operation crosses a device boundary inside an AFP shared volume, which the standard library's renameat() cannot handle. The function attempts to prevent buffer overflows by tracking available space in a size_t remain variable. However, the arithmetic used to compute remain results in an unsigned integer underflow, causing the variable to become SIZE_MAX. Because of this, the subsequent boundary check always evaluates as safe, allowing an unbounded strcpy() operation to copy attacker-controlled filenames into a nearly full stack buffer. Version 4.4.3 patches the issue.