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CVE-2026-44050— Heap buffer overflow in CNID daemon comm_rcv()

Quick assessment

Affected
Netatalk Netatalk
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Netatalk是Netatalk开源的一款软件，为 Classic Mac OS 和 macOS 在 Unix-like OS 上提供 AFP 文件服务器功能。 Netatalk 2.0.0版本至4.4.2版本存在安全漏洞，该漏洞源于CNID守护进程comm_rcv函数中堆缓冲区溢出，可能导致远程认证攻击者以提升的权限执行任意代码或造成拒绝服务。

CVSS 9.9 · Critical EPSS 0.42% · P35

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 2

VendorProduct Version RangeStatus
Netatalk Netatalk 2.0.0≤ 4.4.2 affected
4.4.3 unaffected
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I. Basic Information for CVE-2026-44050

Vulnerability Information
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Vulnerability Title
Heap buffer overflow in CNID daemon comm_rcv()
Source: CVE Program / CVE List V5
Vulnerability Description
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 a denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Netatalk 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netatalk是Netatalk开源的一款软件，为 Classic Mac OS 和 macOS 在 Unix-like OS 上提供 AFP 文件服务器功能。 Netatalk 2.0.0版本至4.4.2版本存在安全漏洞，该漏洞源于CNID守护进程comm_rcv函数中堆缓冲区溢出，可能导致远程认证攻击者以提升的权限执行任意代码或造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Netatalk Netatalk 2.0.0 ~ 4.4.2 -

II. Public POCs for CVE-2026-44050

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III. Intelligence Information for CVE-2026-44050

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Vendor Advisories for CVE-2026-44050 (1)

Same Patch Batch · Netatalk · 2026-05-21 · 33 CVEs total

CVE-2026-44047 8.8 HIGH SQL injection in MySQL CNID backend
CVE-2026-44048 8.8 HIGH Stack buffer overflow via UCS-2 type confusion in convert_charset()
CVE-2026-44051 8.1 HIGH Arbitrary file read via attacker-controlled symlink creation
CVE-2026-44068 7.6 HIGH EA path traversal via incomplete sanitization
CVE-2026-44062 7.5 HIGH Missing o_len bounds check in pull_charset_flags()
CVE-2026-44055 7.5 HIGH Bitwise OR logic bug enables shell injection
CVE-2026-44052 7.5 HIGH LDAP simple-bind password exposure in log output
CVE-2026-44060 7.5 HIGH Integer underflow in dsi_writeinit() leads to denial of service
CVE-2026-44049 7.5 HIGH Out-of-bounds write in convert_charset() null termination
CVE-2026-44053 7.4 HIGH Weak cryptography in DHCAST128 UAM
CVE-2026-44066 7.1 HIGH Heap out-of-bounds reads in Spotlight RPC unmarshalling
CVE-2026-44064 7.1 HIGH ASP session ID out-of-bounds access
CVE-2026-44076 6.7 MEDIUM Shell injection via volume path
CVE-2026-44054 6.5 MEDIUM Predictable afpd session token
CVE-2026-44058 6.4 MEDIUM Authentication bypass via admin auth user
CVE-2026-44056 6.0 MEDIUM Stack buffer overflow in desktop.c
CVE-2026-44061 5.9 MEDIUM DES-ECB auth with timing side channel
CVE-2026-44063 4.2 MEDIUM LDAP filter injection
CVE-2026-44073 4.0 MEDIUM seteuid failure ignored in auth modules
CVE-2026-44059 3.9 LOW Non-reentrant privilege toggle

Showing top 20 of 33 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Netatalk
Same vendor: Netatalk
Same weakness: CWE-122

V. Comments for CVE-2026-44050

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