# CVE-2026-44064: Netatalk out-of-bounds access in ASP session ID handling

Source: https://junglewise.ai/threats/cve-2026-44064-netatalk-out-of-bounds-access-in-asp-session-id-handling  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-21. Updated: 2026-05-21  
License: CC BY 4.0 with a link back

CVE-2026-44064 · Severity: high · CVSS 7.1 · Published 2026-05-21

Netatalk is an open-source implementation of the Apple Filing Protocol (AFP) used to allow Linux and Unix systems to act as file servers for macOS clients. A vulnerability in how the software handles legacy AppleTalk session IDs allows an unauthenticated attacker on the same local network to crash the file sharing service. This could lead to a loss of availability for users relying on the server for file storage and access.

Technologies: [Netatalk](https://junglewise.ai/threats/technologies/netatalk). Vendors: [Netatalk](https://junglewise.ai/threats/vendors/netatalk).

## Quick answers

**Is CVE-2026-44064 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-44064 being exploited in the wild.

**How severe is CVE-2026-44064?** High severity, with a CVSS score of 7.1, published 21 May 2026.

**Which products and versions are affected?** Netatalk 1.3 through 4.4.2.

**Is there a fix for CVE-2026-44064?** A patch was published on 2026-05-21: Fixed in version 4.4.3 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-44064 attacked?** It is attacked from the adjacent network, in a software library.

**Am I affected by CVE-2026-44064?** Check whether you run Netatalk at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An out-of-bounds read (CWE-125) exists in Netatalk's legacy ASP/DDP session handling. The vulnerability is caused by using an attacker-controlled ASP session ID as an array index without validating it against the session table size. An unauthenticated attacker on an adjacent network can exploit this to cause a service crash (Denial of Service) or potentially achieve remote code execution, though the latter is less certain. The issue affects versions 1.3 through 4.4.2 and is fixed in version 4.4.3. Administrators can mitigate the risk by disabling AppleTalk support in the configuration.

## Affected products

- Netatalk Netatalk 1.3 through 4.4.2

## Timeline

- 2026-05-13: disclosed
- 2026-05-21: advisory: NVD publication date
- 2026-05-21: patched: Fixed in version 4.4.3

## References

- [https://netatalk.io/security/CVE-2026-44064](https://netatalk.io/security/CVE-2026-44064)

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- [Netatalk TOCTOU race condition in ad_flush](https://junglewise.ai/threats/cve-2026-7837-netatalk-toctou-race-condition-in-ad-flush)
- [Netatalk missing break statement in DSI OpenSession](https://junglewise.ai/threats/cve-2026-44075-netatalk-missing-break-statement-in-dsi-opensession)
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