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CWE-909 (资源初始化缺失) — Vulnerability Class 11

11 vulnerabilities classified as CWE-909 (资源初始化缺失). AI Chinese analysis included.

CWE-909 represents a critical resource management weakness where software fails to properly initialize essential variables or objects before use. This oversight typically allows attackers to exploit uninitialized memory or state, leading to unpredictable behavior, information disclosure, or denial of service. By accessing resources containing stale, default, or garbage data, adversaries can manipulate application logic, bypass security controls, or trigger crashes. Developers prevent this vulnerability by rigorously initializing all critical resources immediately upon allocation or declaration. Implementing strict coding standards that mandate explicit initialization, utilizing static analysis tools to detect uninitialized variables, and conducting thorough code reviews ensure that every resource holds a valid, expected state before execution. This proactive approach eliminates the risk of relying on undefined or insecure default values, thereby maintaining application integrity and security.

MITRE CWE Description
The product does not initialize a critical resource. Many resources require initialization before they can be properly used. If a resource is not initialized, it could contain unpredictable or expired data, or it could be initialized to defaults that are invalid. This can have security implications when the resource is expected to have certain properties or values.
Common Consequences (2)
ConfidentialityRead Memory, Read Application Data
When reusing a resource such as memory or a program variable, the original contents of that resource may not be cleared before it is sent to an untrusted party.
AvailabilityDoS: Crash, Exit, or Restart
The uninitialized resource may contain values that cause program flow to change in ways that the programmer did not intend.
Mitigations (4)
ImplementationExplicitly initialize the resource before use. If this is performed through an API function or standard procedure, follow all specified steps.
ImplementationPay close attention to complex conditionals that affect initialization, since some branches might not perform the initialization.
ImplementationAvoid race conditions (CWE-362) during initialization routines.
Build and CompilationRun or compile your product with settings that generate warnings about uninitialized variables or data.
Examples (2)
Here, a boolean initiailized field is consulted to ensure that initialization tasks are only completed once. However, the field is mistakenly set to true during static initialization, so the initialization code is never reached.
private boolean initialized = true; public void someMethod() { if (!initialized) { // perform initialization tasks ... initialized = true; }
Bad · Java
The following code intends to limit certain operations to the administrator only.
$username = GetCurrentUser(); $state = GetStateData($username); if (defined($state)) { $uid = ExtractUserID($state); } # do stuff if ($uid == 0) { DoAdminThings(); }
Bad · Perl
CVE IDTitleCVSSSeverityPublished
CVE-2026-40687 Exim 安全漏洞 — Exim 4.8 Medium2026-04-30
CVE-2025-8117 Account Takeover via Reset Password Functionality in PAD CMS — PAD CMS 9.1AICriticalAI2025-09-30
CVE-2025-54410 Moby's Firewalld reload removes bridge network isolation — moby 3.3 Low2025-07-30
CVE-2025-54388 Moby's Firewalld reload makes published container ports accessible from remote hosts — moby--2025-07-30
CVE-2024-32945 LaTeX post content manipulation via renderer state leak across contexts — Mattermost 2.6 Low2024-07-15
CVE-2022-0175 virglrenderer 安全漏洞 — virglrenderer 5.5 -2022-08-26
CVE-2022-0382 Linux kernel 信息泄露漏洞 — kernel 3.3 -2022-02-11
CVE-2021-3655 Linux kernel 输入验证错误漏洞 — kernel 3.3 -2021-08-05
CVE-2021-28167 Eclipse OpenJ9 安全漏洞 — Eclipse OpenJ9 5.3 -2021-04-21
CVE-2020-12523 Phoenix Contact mGuard Devices versions before 8.8.3: LAN ports get functional after reboot even if they are disabled in the device configuration — TC MGUARD RS4000 4G VZW VPN (1010461) 5.4 Medium2020-12-17
CVE-2019-3804 Cockpit 安全漏洞 — cockpit 7.5 -2019-03-26

Vulnerabilities classified as CWE-909 (资源初始化缺失) represent 11 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.