CVE-2016-2339
CriticalSummary
CVE-2016-2339 describes a heap overflow vulnerability in the 'initialize' function of Fiddle::Function.new in Ruby. A specially crafted object passed as an element of the args array can increase the size of this array after allocation, leading to a heap overflow.
Risk Assessment
Heap overflow can lead to unauthorized memory access, creating a risk of executing malicious code and potentially compromising the system.
Recommendation
It is recommended to update Ruby to the latest version where this vulnerability has been patched, and to review the code to identify and eliminate potential instances of this overflow.
Related vulnerabilities
- CVE-2026-14349Critical
The TrueBooker – Appointment Booking and Scheduler System plugin for WordPress in all versions up to and including 1.2.3 is vulnerable to authorization bypass. This is due to the plugin not properly verifying that a user is authorized to perform an action. This allows unauthenticated attackers to modify the email address of arbitrary user accounts, including administrators, which can be leveraged to reset the account password and gain access.
- CVE-2026-12793Critical
The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress in all versions up to and including 3.6.2 is vulnerable to Privilege Escalation. This is due to the plugin not validating that a submitted form ID belongs to a JetFormBuilder form before parsing the referenced post's content as form schema and executing an Advanced Validation server-side callback. This allows unauthenticated attackers to create a new administrator-level user account.
- CVE-2026-15640Critical
Under certain conditions a valid SAML IdP response may be used to impersonate another Secret Server user. The vulnerability affects the SAML authentication mechanism.
- CVE-2026-15639Critical
An attacker can craft a malicious link that, if used by a legitimate user, may cause the user's browser to run JavaScript supplied by the attacker. The vulnerability affects the link processing mechanism.
- CVE-2026-15638Critical
An unauthenticated user with access to Secret Server could leverage a padding oracle to decrypt or encrypt data using one of the server's cryptographic keys. The key itself is not exposed.
- CVE-2026-81855Critical
A hardcoded cryptographic client authentication key vulnerability exists in the robot testing framework component of Wärtsilä FOS-Onboard. The key is embedded in the software and cannot be changed by administrators.
- CVE-2026-78225Critical
A hardcoded cryptographic server key vulnerability exists in the deployer-ng Update Controller component of Wärtsilä FOS-Onboard. The key is embedded in the software and cannot be changed by administrators.
- CVE-2026-73807Critical
The mySCADA myPRO Manager command API does not properly enforce authentication for privileged functions. An unauthenticated attacker with network access to the affected API could exploit this vulnerability to access privileged management functions.
- CVE-2026-73437Critical
On affected platforms running Arista EOS with Dynamic Host Configuration Protocol (DHCP) relay configured, an unauthenticated attacker with network access could send a crafted DHCP reply packet from an IP address that is not configured as a helper address, and the relay agent would forward it to clients without validating the source.
- CVE-2026-61560Critical
`@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab. Prior to version 2.1.27, the SSE transport mode (`SSE=true`) exposes all MCP tools without any authentication. The `upload_markdown` tool reads arbitrary files from the server's local filesystem via an unsanitized `file_path` parameter and uploads them to a GitLab project.
Original NVD description (English source)
An exploitable heap overflow vulnerability exists in the Fiddle::Function.new "initialize" function functionality of Ruby. In Fiddle::Function.new "initialize" heap buffer "arg_types" allocation is made based on args array length. Specially constructed object passed as element of args array can increase this array size after mentioned allocation and cause heap overflow.

