SB20261109114 - Multiple vulnerabilities in Netatalk

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Main Vulnerability Database SB20261109114

SB20261109114 - Multiple vulnerabilities in Netatalk

Published: November 9, 2026

Security Bulletin ID SB20261109114
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 33% Low 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2026-110779)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows an authenticated remote attacker to trigger a heap out-of-bounds read in Netatalk.

The vulnerability exists due to missing element type and size validation when Spotlight copies eight bytes from each item in a mixed-type query array. An authenticated remote attacker can submit short elements through Spotlight RPC when Spotlight is built and enabled and an accessible volume is open, with unauthenticated exploitation also possible through optional guest authentication and a guest-accessible volume.


2) NULL pointer dereference (CVE-ID: CVE-2026-110780)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows an unauthenticated remote attacker to crash their Netatalk afpd connection process when guest AFP access is enabled.

The vulnerability exists due to missing element-count checks in Spotlight RPC handlers for CNID arrays with an outer length greater than 16 and zero entries. An unauthenticated remote attacker can send a crafted Spotlight RPC request to trigger a NULL-pointer dereference, causing denial of service limited to their own session in the default configuration.


3) Out-of-bounds write (CVE-ID: CVE-2026-103933)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 7.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an authenticated remote attacker to execute arbitrary code as root in Netatalk's afpd daemon in root-started deployments.

The vulnerability exists due to missing bounds checks in the AppleDouble extended-attribute backend when ea = ad and FPGetExtAttr supplies an undersized MaxReplySize. An authenticated remote attacker with AFP access to the target object can trigger a memory overwrite using a malformed sidecar already present or created through a separate write path, hijacking execution.


Remediation

Install update from vendor's website.

References