CVE-2025-11935: wolfssl Weak Crypto — Fix

Description

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-326 CWE-326

Affected Products

Vendor	Product	Versions
wolfssl	wolfssl	5.8.2 — 5.8.4
apple	macos	All
linux	linux_kernel	All

References

Advisories & Patches

https://github.com/wolfSSL/wolfssl/pull/9112

Other References

https://github.com/wolfSSL/wolfssl

Frequently Asked Questions

What is CVE-2025-11935? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-11935? +

CVE-2025-11935 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-11935? +

CVE-2025-11935 affects products from apple, linux, wolfssl, specifically: linux_kernel, macos, wolfssl. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-11935? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-11935