With TLS 5.8.2 psk_dhe_ke inadequate encryption

Summaryinfo

A vulnerability marked as problematic has been reported in With TLS 5.8.2. The affected element is the function psk_dhe_ke. This manipulation causes inadequate encryption. This vulnerability is registered as CVE-2025-11935. Remote exploitation of the attack is possible. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in With TLS 5.8.2. It has been declared as problematic. Affected by this vulnerability is the function psk_dhe_ke. The manipulation with an unknown input leads to a inadequate encryption vulnerability. The CWE definition for the vulnerability is CWE-326. The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required. As an impact it is known to affect confidentiality. The summary by CVE is:

With TLS 1.3 pre-shared key (PSK) a malicious or faulty server could ignore the request for PFS (perfect forward secrecy) and the client would continue on with the connection using PSK without PFS. This happened when a server responded to a ClientHello containing psk_dhe_ke without a key_share extension. The re-use of an authenticated PSK connection that on the clients side unexpectedly did not have PFS, reduces the security of the connection.

The weakness was published by Jaehun Lee. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-11935 since 10/18/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 276565 (Linux Distros Unpatched Vulnerability : CVE-2025-11935), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (276565). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• With TLS

Version

• 5.8.2

CPE 2.3info

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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