Veille CVE

Vendredi 24 juillet 2026

1 CVE

Critique 0 Élevée 1 Moyenne 0 Faible 0 Non évaluée 0 Exploitées (KEV) Tri : plus récentes « OpenSSL » ✕
  1. CVE-2026-66033 7.5 Élevée

    libssh2 · Libssh2 libssh2

    libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow vulnerability in the ssh2_cipher_crypt() function in src/openssl.c that allows a malicious SSH server to crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploit the underflow in the expression computing blocksize minus aadlen minus authentication tag length to trigger an out-of-bounds read and a memcpy call with a near-SIZE_MAX length argument, causing immediate process crash before any authentication occurs.