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A missing break statement in DSI OpenSession processing in Netatalk 1.5.0 through 4.4.2 causes a DSIOPT_ATTNQUANT switch case to fall through into… (CVE-2026-44075)

0
Medium
VulnerabilityCVE-2026-44075gcveosvubuntu-cve-2026-44075cve-2026-44075ubuntu-pro-14-04-ltsubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-pro-22-04-ltsubuntu-pro-24-04-ltsubuntu-25-10ubuntu-26-10ubuntu-26-04-lts
Published: 05/21/2026 (05/21/2026, 09:16:00 UTC)
Source: GCVE Database
Product: netatalk

Description

A missing break statement in the DSI OpenSession processing code of Netatalk versions 1.5.0 through 4.4.2 causes a switch case for DSIOPT_ATTNQUANT to fall through into DSIOPT_SERVQUANT. This results in unintended session option handling that may allow a remote attacker to cause a minor service disruption by sending crafted DSI session options.

CVSS v3.1

Score 3.7low

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected software

Ubuntu:Pro:14.04:LTSmore threats →ghsa
netatalk
pkg:deb/ubuntu/netatalk?arch=source&distro=esm-infra-legacy/trusty
Affected versions
=2.2.2-1ubuntu1=2.2.2-1ubuntu2=2.2.2-1ubuntu2.2=2.2.2-1ubuntu2.2+esm1=2.2.2-1ubuntu2.2+esm2=2.2.2-1ubuntu2.2+esm3=2.2.2-1ubuntu2.2+esm4
Ubuntu:Pro:16.04:LTSmore threats →ghsa
netatalk
pkg:deb/ubuntu/netatalk?arch=source&distro=esm-apps-legacy/xenial
Affected versions
=2.2.5-1=2.2.5-1ubuntu0.2=2.2.5-1ubuntu0.2+esm1=2.2.5-1ubuntu0.2+esm2=2.2.5-1ubuntu0.2+esm3=2.2.5-1ubuntu0.2+esm4
Ubuntu:Pro:18.04:LTSmore threats →ghsa
netatalk
pkg:deb/ubuntu/netatalk?arch=source&distro=esm-apps/bionic
Affected versions
=2.2.6-1=2.2.6-1ubuntu0.18.04.2=2.2.6-1ubuntu0.18.04.2+esm1=2.2.6-1ubuntu0.18.04.2+esm2=2.2.6-1ubuntu0.18.04.2+esm3=2.2.6-1ubuntu0.18.04.2+esm4
Ubuntu:Pro:20.04:LTSmore threats →ghsa
netatalk
pkg:deb/ubuntu/netatalk?arch=source&distro=esm-apps/focal
Affected versions
=3.1.12~ds-3=3.1.12~ds-4=3.1.12~ds-4ubuntu0.20.04.1=3.1.12~ds-4ubuntu0.20.04.3=3.1.12~ds-4ubuntu0.20.04.3+esm1=3.1.12~ds-4ubuntu0.20.04.4=3.1.12~ds-4ubuntu0.20.04.4+esm1=3.1.12~ds-4ubuntu0.20.04.4+esm2
Ubuntu:Pro:22.04:LTSmore threats →ghsa
netatalk
pkg:deb/ubuntu/netatalk?arch=source&distro=esm-apps/jammy
Affected versions
=3.1.12~ds-9=3.1.12~ds-9build1=3.1.12~ds-9ubuntu0.22.04.1=3.1.12~ds-9ubuntu0.22.04.3=3.1.12~ds-9ubuntu0.22.04.3+esm1=3.1.12~ds-9ubuntu0.22.04.4=3.1.12~ds-9ubuntu0.22.04.4+esm1=3.1.12~ds-9ubuntu0.22.04.4+esm2
Ubuntu:Pro:24.04:LTSmore threats →ghsa
netatalk
pkg:deb/ubuntu/netatalk?arch=source&distro=esm-apps/noble
Affected versions
=3.1.15~ds-1ubuntu1=3.1.18~ds-1=3.1.18~ds-1build2=3.1.18~ds-1build4=3.1.18~ds-1ubuntu0.1~esm1=3.1.18~ds-1ubuntu0.1~esm2=3.1.18~ds-1ubuntu0.1~esm3
Ubuntu:25.10more threats →ghsa
netatalk
pkg:deb/ubuntu/netatalk?arch=source&distro=questing
Affected versions
=4.1.2~ds-4=4.2.1~ds-1=4.2.3~ds-1
Ubuntu:26.10more threats →ghsa
netatalk
pkg:deb/ubuntu/netatalk?arch=source&distro=stonking
Affected versions
=4.2.3~ds-2.1=4.4.3~ds-1=4.5.0~ds-3=4.5.1~ds-1
Ubuntu:26.04:LTSmore threats →ghsa
netatalk
pkg:deb/ubuntu/netatalk?arch=source&distro=resolute
Affected versions
=4.2.3~ds-1=4.2.3~ds-2=4.2.3~ds-2.1=4.2.3~ds-2.1ubuntu0.1=4.2.3~ds-2.1ubuntu0.2

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 10/18/2026, 01:34:38 UTC

Technical Analysis

Netatalk versions 1.5.0 through 4.4.2 contain a vulnerability (CVE-2026-44075) caused by a missing break statement in the DSI OpenSession processing logic. Specifically, the DSIOPT_ATTNQUANT switch case falls through into DSIOPT_SERVQUANT, leading to improper handling of session options. This flaw can be exploited remotely to cause a minor denial of service by sending specially crafted DSI session options.

Potential Impact

The vulnerability allows a remote attacker to cause a minor service disruption (denial of service) by exploiting improper session option handling due to the missing break statement. There is no impact on confidentiality or integrity, and no privilege escalation is involved.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider restricting access to the Netatalk service from untrusted networks to reduce exposure.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-44075
Osv Schema Version
1.7.0
Ecosystems
["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:26.10","Ubuntu:26.04:LTS"]
Cvss Version
3.1

Threat ID: 6ad3f6732cdf04f65666626d

Added to database: 10/17/2026, 22:28:03 UTC

Last enriched: 10/18/2026, 01:34:38 UTC

Last updated: 10/18/2026, 01:34:38 UTC

Views: 6

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