Eclipse ThreadX up to 6.5.2.202603a DTLS Server allocation of resources

Summaryinfo

A vulnerability identified as critical has been detected in Eclipse ThreadX up to 6.5.2.202603a. Affected by this issue is some unknown functionality of the component DTLS Server. The manipulation leads to allocation of resources. This vulnerability is referenced as CVE-2026-115215. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Eclipse ThreadX up to 6.5.2.202603a. It has been rated as critical. This issue affects some unknown functionality of the component DTLS Server. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. The summary by CVE is:

In Eclipse ThreadX NetX Duo versions 6.0 through 6.5.2.202603a, the NetX Secure DTLS server allocates a session from its fixed session pool for the first datagram from any unrecognised address and port, before the cookie exchange, and never releases a session whose handshake stalls. A remote, unauthenticated attacker can exhaust the pool with one spoofed datagram per source and deny DTLS service to legitimate clients until the application resets the sessions.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-115215 since 10/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Eclipse

Name

• ThreadX

Version

• 6.5.2.202603a

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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