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PatchSiren cyber security CVE debrief

CVE-2026-44074 Netatalk CVE debrief

CVE-2026-44074 is a low-severity Netatalk issue where multiple errno values are combined with bitwise OR instead of being handled as distinct errors. When more than one error condition occurs at the same time, the resulting incorrect error code can send execution into the wrong error-handling path. The practical impact described in the source is a minor service disruption caused by remote-triggered conditions, rather than data loss or code execution.

Vendor
Netatalk
Product
Unknown
CVSS
LOW 3.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-21
Original CVE updated
2026-05-21
Advisory published
2026-05-21
Advisory updated
2026-05-21

Who should care

Administrators and operators running Netatalk 2.1.0 through 4.4.2 should review this issue, especially if the service is exposed to remote clients and reliability is important. Security teams that track availability-only defects and error-handling bugs should also include it in routine patching and validation.

Technical summary

According to the NVD record and the linked Netatalk advisory, the flaw is an error-handling defect: Netatalk combines multiple errno values using bitwise OR, which can produce an incorrect composite error code when simultaneous failures occur. The CVE is mapped to CWE-682 and has CVSS 3.1 vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L, indicating network reachability, no privileges or user interaction required, and limited availability impact.

Defensive priority

Low; address through normal maintenance rather than emergency response.

Recommended defensive actions

  • Check whether any deployed Netatalk instances fall within the affected version range 2.1.0 through 4.4.2.
  • Review the Netatalk security advisory for vendor guidance and any fixed-release information before scheduling remediation.
  • Patch or upgrade affected instances when a maintenance window is available, prioritizing internet-facing or highly available deployments.
  • Monitor for unusual service instability or error-handling anomalies in Netatalk logs after exposure to remote clients.
  • If immediate upgrading is not possible, apply compensating controls that reduce exposure and limit the blast radius of service disruption.

Evidence notes

All claims here are limited to the supplied NVD record and the linked Netatalk advisory. The source states that versions 2.1.0 through 4.4.2 are affected, that the defect involves combining errno values with bitwise OR, and that the likely impact is minor service disruption. The NVD record assigns CWE-682 and the CVSS v3.1 vector AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L. The vendor mapping in the source corpus is low-confidence, so this debrief treats Netatalk as the product reference rather than asserting a finalized vendor identity.

Official resources

CVE-2026-44074 was published and last modified on 2026-05-21. The source corpus ties the issue to Netatalk and describes a limited remote availability impact.