PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-44071 Netatalk CVE debrief

CVE-2026-44071 is a low-severity issue in Netatalk builds from 3.1.2 through 4.4.2 that are compiled without FORTIFY_SOURCE. The missing hardening removes built-in runtime checks that can catch certain buffer overflows before they become memory errors. According to the published description, a remote attacker may be able to trigger a minor denial of service in affected builds.

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 running Netatalk, Linux distribution maintainers, and anyone packaging or compiling Netatalk should care. It is especially relevant where build flags are managed centrally, because the issue depends on how the software was compiled rather than on a single runtime configuration.

Technical summary

The published record says Netatalk 3.1.2 through 4.4.2 may be compiled without FORTIFY_SOURCE, a compiler/runtime hardening feature that adds checks for some unsafe buffer operations. Without those checks, memory errors that might otherwise be detected and safely terminated can continue into a crash or similar service interruption. The NVD vector reflects network reachability, no privileges, no user interaction, and low availability impact (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L). The listed weakness is CWE-693, which maps to protection mechanism failure.

Defensive priority

Low, but worth addressing in the normal patch/build-hardening cycle. The main impact is limited availability loss, not data exposure or integrity compromise.

Recommended defensive actions

  • Verify whether deployed Netatalk packages were built with FORTIFY_SOURCE enabled.
  • Upgrade to a Netatalk release or distribution package that restores the intended hardening.
  • For custom builds, review compiler and distribution hardening flags used in your build pipeline.
  • Rebuild affected packages with standard security hardening enabled and confirm the resulting binaries.
  • Monitor for service crashes or unusual memory-related terminations in Netatalk instances until remediated.

Evidence notes

All substantive claims in this debrief come from the supplied CVE description and NVD metadata. The affected range is 3.1.2 through 4.4.2; the weakness is CWE-693; the CVSS vector is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L; and the only referenced vendor/project evidence is the Netatalk security page linked in the source record. The source data marks the vendor mapping as low confidence, so the product attribution should be treated as Netatalk based on the supplied evidence rather than as a fully resolved vendor record.

Official resources

Published in the CVE/NVD record on 2026-05-21T09:16:29.340Z; modified the same time in the supplied source data.