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CVE-2026-7837— TOCTOU with root privilege in ad_flush

CVSS 3.7 · Low EPSS 0.04% · P11

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProductVersion RangeStatus
NetatalkNetatalk3.0.0≤ 4.4.2affected
4.5.0unaffected
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I. Basic Information for CVE-2026-7837

Vulnerability Information
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Vulnerability Title
TOCTOU with root privilege in ad_flush
Source: NVD (National Vulnerability Database)
Vulnerability Description
A time-of-check time-of-use (TOCTOU) condition in the ad_flush function in Netatalk 3.0.0 through 4.4.2 involves root-privileged file operations, which may allow a remote attacker to cause limited data modification under specific race conditions.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: NVD (National Vulnerability Database)
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 3.0.0版本至4.4.2版本存在安全漏洞，该漏洞源于ad_flush函数中存在检查时间使用时间条件，可能导致远程攻击者在特定竞争条件下造成有限的数据修改。
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

VendorProductAffected VersionsCPESubscribe
NetatalkNetatalk 3.0.0 ~ 4.4.2 -

II. Public POCs for CVE-2026-7837

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III. Intelligence Information for CVE-2026-7837

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Vendor Advisories for CVE-2026-7837 (1)

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

CVE-2026-440509.9 CRITICALHeap buffer overflow in CNID daemon comm_rcv()
CVE-2026-440478.8 HIGHSQL injection in MySQL CNID backend
CVE-2026-440488.8 HIGHStack buffer overflow via UCS-2 type confusion in convert_charset()
CVE-2026-440518.1 HIGHArbitrary file read via attacker-controlled symlink creation
CVE-2026-440687.6 HIGHEA path traversal via incomplete sanitization
CVE-2026-440557.5 HIGHBitwise OR logic bug enables shell injection
CVE-2026-440527.5 HIGHLDAP simple-bind password exposure in log output
CVE-2026-440607.5 HIGHInteger underflow in dsi_writeinit() leads to denial of service
CVE-2026-440497.5 HIGHOut-of-bounds write in convert_charset() null termination
CVE-2026-440627.5 HIGHMissing o_len bounds check in pull_charset_flags()
CVE-2026-440537.4 HIGHWeak cryptography in DHCAST128 UAM
CVE-2026-440667.1 HIGHHeap out-of-bounds reads in Spotlight RPC unmarshalling
CVE-2026-440647.1 HIGHASP session ID out-of-bounds access
CVE-2026-440766.7 MEDIUMShell injection via volume path
CVE-2026-440546.5 MEDIUMPredictable afpd session token
CVE-2026-440586.4 MEDIUMAuthentication bypass via admin auth user
CVE-2026-440566.0 MEDIUMStack buffer overflow in desktop.c
CVE-2026-440615.9 MEDIUMDES-ECB auth with timing side channel
CVE-2026-440634.2 MEDIUMLDAP filter injection
CVE-2026-440734.0 MEDIUMseteuid failure ignored in auth modules

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

IV. Related Vulnerabilities

Same product: Netatalk
Same vendor: Netatalk
Same weakness: CWE-367

V. Comments for CVE-2026-7837

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