# CVE-2026-45698: netatalk: Netatalk is a Free and Open Source file server suite for Unix-like operating systems

CVE-2026-45698 is fixed in netatalk on 1 platform, first by DEBIAN-CVE-2026-45698, released May 27, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-45698
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0045
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 17, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | netatalk Debian 13.5 (trixie) | 4.2.3~ds-1+deb13u2 | [DEBIAN-CVE-2026-45698](https://patchblox.com/security/data/fix/linux/debian-cve-2026-45698.md) | May 27, 2026 |
| Linux | netatalk Debian 14 | 4.4.3~ds-1 | [DEBIAN-CVE-2026-45698](https://patchblox.com/security/data/fix/linux/debian-cve-2026-45698.md) | May 27, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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