CVE-2026-42770 FFC-DH Peer Validation Uses Attacker-Supplied q

Issue summary: When EVPPKEYderivesetpeer is called with a DHX X9.42 peer key, the peer key is not properly checked for the subgroup membership. Impact summary: A malicious peer which presents an X9.42 key carrying the victim's p and g parameters, a forged q = r a small prime factor of the cofacto...

CVE-2026-42770 FFC-DH Peer Validation Uses Attacker-Supplied q

Issue summary: When EVPPKEYderivesetpeer is called with a DHX X9.42 peer key, the peer key is not properly checked for the subgroup membership. Impact summary: A malicious peer which presents an X9.42 key carrying the victim's p and g parameters, a forged q = r a small prime factor of the cofacto...

CVE-2026-42770

Issue summary: When EVPPKEYderivesetpeer is called with a DHX X9.42 peer key, the peer key is not properly checked for the subgroup membership. Impact summary: A malicious peer which presents an X9.42 key carrying the victim's p and g parameters, a forged q = r a small prime factor of the cofacto...

CVE-2026-42770

CVE-2026-42770 affects OpenSSL FIPS modules (4.0, 3.6, 3.5, 3.4, 3.0) and related deployments using EVP_PKEY_derive_set_peer() with DHX/X9.42 keys. The vulnerability arises when the subgroup check Y^q ≡ 1 (mod p) uses the peer’s q instead of the local key’s q, allowing a malicious X9.42 peer to c...

OpenSSL 安全漏洞

OpenSSL is an open-source encryption library developed by the OpenSSL team that enables secure implementation of Secure Sockets Layer SSLv2/v3 and Secure Transport Layer TLSv1 protocols. This product supports various encryption algorithms, including symmetric ciphers, hash algorithms, and secure...

PT-2026-47840

Name of the Vulnerable Software and Affected Versions OpenSSL FIPS modules versions 3.0, 3.4, 3.5, 3.6, and 4.0 Description When the EVP PKEY derive set peer function is called with a DHX X9.42 peer key, the software fails to properly verify subgroup membership. Specifically, the check Y^q ≡ 1 mo...

CVE-2026-45614 OP-TEE vulnerable to ECDH private key recovery

OP-TEE is a Trusted Execution Environment TEE designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Prior to version 4.11.0, on many of the ECDH shared secret paths, the public key isn't verified to be a point on the correct curve. By...

cryptography: cryptography Subgroup Attack Due to Missing Subgroup Validation for SECT Curves

A validation flaw has been discovered in the python cryptography package. This missing validation allows an attacker to provide a public key point P from a small-order subgroup. This can lead to security issues in various situations, such as the most commonly used signature verification ECDSA and...

cryptography: cryptography Subgroup Attack Due to Missing Subgroup Validation for SECT Curves

A validation flaw has been discovered in the python cryptography package. This missing validation allows an attacker to provide a public key point P from a small-order subgroup. This can lead to security issues in various situations, such as the most commonly used signature verification ECDSA and...

USN-8319-1: Libgcrypt vulnerabilities

It was discovered that Libgcrypt incorrectly handled crafted ECDH ciphertext. An attacker could possibly use this issue to cause Libgcrypt to crash, resulting in a denial of service. CVE-2026-41989 It was discovered that Libgcrypt incorrectly handled Dilithium signing. An attacker could possibly...

CVE-2026-44053 Weak cryptography in DHCAST128 UAM

Netatalk 1.5.0 through 4.2.2 uses a broken cryptographic algorithm in the DHCAST128 UAM, which allows a remote attacker to obtain authentication credentials or impersonate a user via cryptanalytic attack...

CVE-2026-44053

Netatalk 1.5.0 through 4.2.2 uses a broken cryptographic algorithm in the DHCAST128 UAM, which allows a remote attacker to obtain authentication credentials or impersonate a user via cryptanalytic attack...

CVE-2026-44053

Netatalk 1.5.0 through 4.2.2 uses a broken cryptographic algorithm in the DHCAST128 UAM, which allows a remote attacker to obtain authentication credentials or impersonate a user via cryptanalytic attack...

Astra Linux – Vulnerability in mbedtls

A issue was discovered in Mbed TLS before version 2.25.0 and before versions 2.16.9 LTS and 2.7.18 LTS. The calculations performed by mbedtlsmpiexpmod are not limited; therefore, providing overly large parameters could lead to a denial of service when generating Diffie-Hellman key pairs...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: crypto: lib/mpi – avoid null pointer dereference in mpicmpui During NVMeTCP authentication, a controller can trigger a kernel oops by specifying the 8192-bit Diffie Hellman group and passing a correctly sized, but zeroed Diffie...

Astra Linux – Vulnerability in openssl1.0

The Raccoon attack exploits a flaw in the TLS specification, which allows an attacker to calculate the pre-master secret in connections that use a Diffie-Hellman DH-based ciphersuite. In such cases, the attacker can eavesdrop on all encrypted communications sent over that TLS connection. The atta...

Astra Linux – Vulnerability in OpenSSL

Issue Summary: Checking excessively long DH keys or parameters can be very slow. Impact Summary: Applications that use functions like DHcheck, DHcheckex, or EVPPKEYparamcheck to check DH keys or parameters may experience prolonged delays. If the keys or parameters are obtained from an untrusted...

Astra Linux – Vulnerability in libssh2

In libssh2 before version 1.9.0, the kexmethoddiffiehellmangroupexchangesha256keyexchange function in kex.c contains an integer overflow that could lead to an out-of-bounds read when packets are read from the server. A remote attacker who compromises an SSH server may be able to disclose sensitiv...

Astra Linux – Vulnerability in Node.js

The generateKeys API function returned by crypto.createDiffieHellman only generates missing or outdated keys. In other words, it only generates a private key if none has been set yet. However, this function is also needed to compute the corresponding public key after calling setPrivateKey...

OESA-2026-2346 libgcrypt security update

Libgcrypt is a general purpose cryptographic library originally based on code from GnuPG. Security Fixes: Libgcrypt before 1.12.2 sometimes allows a heap-based buffer overflow and denial of service via crafted ECDH ciphertext to gcrypkdecrypt.CVE-2026-41989...