CVE catalog

CVE-2026-44050

A heap-based buffer overflow in the CNID daemon comm_rcv() function in Netatalk 2.0.0 through 4.4.2 allows a remote authenticated attacker to execute arbitrary code with escalated privileges or cause

[CVE catalog]

Severity: Critical · CVSS 9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published: May 21, 2026, 7:34:21 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.42% · Oct 25, 2026

A flaw was found in Netatalk. A heap buffer overflow vulnerability exists within the `comm_rcv()` function of the `cnid` daemon. This flaw could allow a remote attacker with low privileges to execute arbitrary code on the affected system. Successful exploitation can lead to a complete compromise of the system's confidentiality, integrity, and availability. Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Cpe	netatalk	Not reported	`3.1.18~ds-1ubuntu0.1~esm2`	fixed
Debian	netatalk	13	`4.2.3~ds-1`	vulnerable
Debian	netatalk	13	`4.2.3~ds-1+deb13u1`	vulnerable
Debian	netatalk	13	`4.2.3~ds-1+deb13u2`	fixed
Debian	netatalk	14	`4.2.3~ds-1`	vulnerable
Debian	netatalk	14	`4.2.3~ds-2`	vulnerable
Debian	netatalk	14	`4.2.3~ds-2.1`	vulnerable
Debian	netatalk	14	`4.4.1~ds-1`	vulnerable
Debian	netatalk	14	`4.4.2~ds-1`	vulnerable
Debian	netatalk	14	`4.4.3~ds-1`	fixed
Ubuntu	netatalk	pro	`3.1.15~ds-1ubuntu1`	vulnerable
Ubuntu	netatalk	pro	`3.1.18~ds-1`	vulnerable
Ubuntu	netatalk	pro	`3.1.18~ds-1build2`	vulnerable
Ubuntu	netatalk	pro	`3.1.18~ds-1build4`	vulnerable
Ubuntu	netatalk	pro	`3.1.18~ds-1ubuntu0.1~esm1`	vulnerable
Ubuntu	netatalk	pro	`3.1.18~ds-1ubuntu0.1~esm2`	fixed
Ubuntu	netatalk	25.10	`4.1.2~ds-4`	vulnerable
Ubuntu	netatalk	25.10	`4.2.1~ds-1`	vulnerable
Ubuntu	netatalk	25.10	`4.2.3~ds-1`	vulnerable
Ubuntu	netatalk	26.04	`4.2.3~ds-1`	vulnerable
Ubuntu	netatalk	26.04	`4.2.3~ds-2`	vulnerable
Ubuntu	netatalk	26.04	`4.2.3~ds-2.1`	vulnerable
Ubuntu	netatalk	26.04	`4.2.3~ds-2.1ubuntu0.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Cpe	netatalk	cpe	Not reported	`3.1.18~ds-1ubuntu0.1~esm2`	Not reported	Not reported	Not reported
Debian	netatalk	deb	13	`4.2.3~ds-1+deb13u2`	Not reported	DEBIAN-CVE-2026-44050	Not reported
Debian	netatalk	deb	14	`4.4.3~ds-1`	Not reported	DEBIAN-CVE-2026-44050	Not reported
Ubuntu	netatalk	deb	pro	`3.1.18~ds-1ubuntu0.1~esm2`	Not reported	UBUNTU-CVE-2026-44050	Not reported
Ubuntu	netatalk	deb	26.04	`4.2.3~ds-2.1ubuntu0.1`	Not reported	UBUNTU-CVE-2026-44050	Not reported

OpenFactory catalog packages

[Debian 13 (Trixie)]

[a2boot]Fixed
Source package: [netatalk]
Details (4)
- 4.2.3~ds-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
[atalkd]Fixed
Source package: [netatalk]
Details (4)
- 4.2.3~ds-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
[libatalk]Fixed
Source package: [netatalk]
Details (4)
- 4.2.3~ds-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
[libatalk-dev]Fixed
Source package: [netatalk]
Details (4)
- 4.2.3~ds-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
[macipgw]Fixed
Source package: [netatalk]
Details (4)
- 4.2.3~ds-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
[netatalk]Fixed
Details (4)
- 4.2.3~ds-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
[netatalk-doc]Fixed
Source package: [netatalk]
Details (4)
- 4.2.3~ds-1+deb13u2 · all · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · all · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · all · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · all · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
[netatalk-tests]Fixed
Source package: [netatalk]
Details (4)
- 4.2.3~ds-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
[netatalk-tools]Fixed
Source package: [netatalk]
Details (4)
- 4.2.3~ds-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
[papd]Fixed
Source package: [netatalk]
Details (4)
- 4.2.3~ds-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
[timelord]Fixed
Source package: [netatalk]
Details (4)
- 4.2.3~ds-1+deb13u2 · amd64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13
- 4.2.3~ds-1+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 4.2.3~ds-1+deb13u2
  nvd · netatalk · debian · 13

Observed: Oct 27, 2026, 7:33:21 AM UTC

References

[FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [Ubuntu Security Notices (USN)]