Buffer Overflow in Netatalk's AFP Daemon Affects Unix-like Systems
CVE-2026-45699

7.5HIGH

Key Information:

Vendor

Netatalk

Status
Netatalk
Vendor
CVE Published:
14 August 2026

What is CVE-2026-45699?

A buffer overflow vulnerability exists in the copydir() function of Netatalk's AFP daemon on Unix-like operating systems. The flaw arises due to an integer underflow in calculating the available buffer size used for constructing paths, specifically when file operations cross device boundaries. This oversight allows strcpy() to append filenames into nearly full stack buffers, bypassing crucial boundary checks. Users are advised to update to version 4.4.3 or implement a configuration that prohibits subdirectories of shared volumes from being mount points for different file systems.

Affected Version(s)

netatalk >= 3.1.19, < 4.4.3

References

https://github.com/Netatalk/netatalk/security/advisories/...
x_refsource_CONFIRM
https://github.com/Netatalk/netatalk/releases/tag/netatal...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.