CVE-2025-11936

Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to...

CVE-2025-11936 Potential DoS Vulnerability through Multiple KeyShareEntry with Same Group in TLS 1.3 ClientHello

Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to...

CVE-2025-11936 Potential DoS Vulnerability through Multiple KeyShareEntry with Same Group in TLS 1.3 ClientHello

Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to...

CVE-2025-11936

The vulnerability is in wolfSSL v5.8.2: improper input validation in TLS 1.3 KeyShareEntry parsing can cause a DoS when a ClientHello contains duplicate KeyShareEntry values for the same supported group. This leads to excessive CPU and memory usage during ClientHello processing. The available doc...

CVE-2025-11936 Potential DoS Vulnerability through Multiple KeyShareEntry with Same Group in TLS 1.3 ClientHello

Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to...

CVE-2025-11936

Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to...

CVE-2025-11933 DoS Vulnerability in wolfSSL TLS 1.3 CKS Extension

Improper Input Validation in the TLS 1.3 CKS extension parsing in wolfSSL 5.8.2 and earlier on multiple platforms allows a remote unauthenticated attacker to potentially cause a denial-of-service via a crafted ClientHello message with duplicate CKS extensions...

CVE-2025-11933 DoS Vulnerability in wolfSSL TLS 1.3 CKS Extension

Improper Input Validation in the TLS 1.3 CKS extension parsing in wolfSSL 5.8.2 and earlier on multiple platforms allows a remote unauthenticated attacker to potentially cause a denial-of-service via a crafted ClientHello message with duplicate CKS extensions...

CVE-2025-11933

Improper Input Validation in the TLS 1.3 CKS extension parsing in wolfSSL 5.8.2 and earlier on multiple platforms allows a remote unauthenticated attacker to potentially cause a denial-of-service via a crafted ClientHello message with duplicate CKS extensions...

CVE-2025-11933 DoS Vulnerability in wolfSSL TLS 1.3 CKS Extension

Improper Input Validation in the TLS 1.3 CKS extension parsing in wolfSSL 5.8.2 and earlier on multiple platforms allows a remote unauthenticated attacker to potentially cause a denial-of-service via a crafted ClientHello message with duplicate CKS extensions...

CVE-2025-11933

CVE-2025-11933 describes an issue in wolfSSL up to version 5.8.2 where improper input validation in the TLS 1.3 CKS extension parsing can allow a remote unauthenticated attacker to cause a denial‑of‑service with a crafted ClientHello containing duplicate CKS extensions. Affected software is wolfS...

CVE-2025-11933

Improper Input Validation in the TLS 1.3 CKS extension parsing in wolfSSL 5.8.2 and earlier on multiple platforms allows a remote unauthenticated attacker to potentially cause a denial-of-service via a crafted ClientHello message with duplicate CKS extensions...

CVE-2025-11934 Improper Validation of Signature Algorithm Used in TLS 1.3 CertificateVerify

Improper input validation in the TLS 1.3 CertificateVerify signature algorithm negotiation in wolfSSL 5.8.2 and earlier on multiple platforms allows for downgrading the signature algorithm used. For example when a client sends ECDSA P521 as the supported signature algorithm the server previously...

CVE-2025-11934

Improper input validation in the TLS 1.3 CertificateVerify signature algorithm negotiation in wolfSSL 5.8.2 and earlier on multiple platforms allows for downgrading the signature algorithm used. For example when a client sends ECDSA P521 as the supported signature algorithm the server previously...

CVE-2025-11934

CVE-2025-11934 concerns wolfSSL’s TLS 1.3 CertificateVerify signature algorithm negotiation. The vulnerability stems from improper input validation that can downgrade the negotiated signature algorithm (e.g., client supports ECDSA P521 but server accepts and uses ECDSA P256), potentially weakenin...

CVE-2025-11934 Improper Validation of Signature Algorithm Used in TLS 1.3 CertificateVerify

Improper input validation in the TLS 1.3 CertificateVerify signature algorithm negotiation in wolfSSL 5.8.2 and earlier on multiple platforms allows for downgrading the signature algorithm used. For example when a client sends ECDSA P521 as the supported signature algorithm the server previously...

CVE-2025-11934

Improper input validation in the TLS 1.3 CertificateVerify signature algorithm negotiation in wolfSSL 5.8.2 and earlier on multiple platforms allows for downgrading the signature algorithm used. For example when a client sends ECDSA P521 as the supported signature algorithm the server previously...

CVE-2025-11935

WolfSSL TLS 1.3 PSK handling vulnerability: when a server answers a ClientHello with psk_dhe_ke and no key_share, the client may proceed with an authenticated PSK without PFS, degrading security. Connected sources indicate WolfSSL has addressed this in fixes across TLS 1.2/1.3 and PSK processing ...

CVE-2025-11935 Forward Secrecy Violation in WolfSSL TLS 1.3

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 pskdheke without a keyshare...

CVE-2025-11935 Forward Secrecy Violation in WolfSSL TLS 1.3

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 pskdheke without a keyshare...