OpenSSL 4.0.0 < 4.0.1 Multiple Vulnerabilities

The version of OpenSSL installed on the remote host is prior to 4.0.1. It is, therefore, affected by multiple vulnerabilities as referenced in the 4.0.1 advisory. - Issue summary: A specially crafted PKCS7 or S/MIME signed message could trigger a use-after-free during PKCS7 signature verification...

OpenSSL Security Advisory 20260609

OpenSSL is susceptible to multiple security vulnerabilities. A specially crafted PKCS7 or S/MIME signed message could trigger a use-after-free during PKCS7 signature verification. The Cryptographic Message Services CMS processing fails to perform sufficient input validation on the cipher and tag...

OpenSSL Toolkit 3.6.3

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer and Transport Layer Security protocols with full-strength cryptography world-wide. This is the 3.6 release...

OpenSSL Toolkit 4.0.1

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer and Transport Layer Security protocols with full-strength cryptography world-wide. This is the 4.0 release...

PT-2026-47837

Name of the Vulnerable Software and Affected Versions OpenSSL affected versions not specified Description A NULL pointer dereference can occur in a CMP client application when processing a crafted CMP response. An attacker controlling a CMP server or acting as a man-in-the-middle can send a CRMF...

CVE-2026-34182: Improper Validation of Integrity Check Value

Issue Summary: Cryptographic Message Services CMS processing fails to perform sufficient input validation on the cipher and tag length fields of AuthEnvelopedData containers, leading to various potential compromises. Impact Summary: Attackers making use of these vulnerabilities may achieve...

CVE-2026-34182

Issue Summary: Cryptographic Message Services CMS processing fails to perform sufficient input validation on the cipher and tag length fields of AuthEnvelopedData containers, leading to various potential compromises. Impact Summary: Attackers making use of these vulnerabilities may achieve...

OpenSSL security vulnerabilities

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...

NULL Pointer Dereference in QUIC Server Initial Packet Handling

Issue summary: Receiving a QUIC initial packet with an invalid token may trigger a NULL pointer dereference in the OpenSSL QUIC server with address validation disabled. Impact summary: NULL pointer dereference typically causes abnormal termination of the affected QUIC server process and a Denial ...

CMS AuthEnvelopedData Processing May Accept Forged Messages

Issue Summary: Cryptographic Message Services CMS processing fails to perform sufficient input validation on the cipher and tag length fields of AuthEnvelopedData containers, leading to various potential compromises. Impact Summary: Attackers making use of these vulnerabilities may achieve...

Double-free When Checking OCSP Stapled Response

Issue summary: A malicious server can exploit TLS OCSP stapling by delivering a crafted response through the statusrequest extension, triggering a double-free in the client’s certificate verification path. Impact summary: Successful exploitation allows an attacker to corrupt heap memory via a...

Heap Buffer Over-read in ASN.1 Content Parsing

Issue summary: Parsing a crafted DER-encoded ASN.1 structure with a primitive element whose content exceeds 2 gigabytes in length may cause a heap buffer over-read on 64-bit Unix and Unix-like platforms. Impact summary: The heap buffer over-read may crash the application Denial of Service or to...

NULL Dereference in Certificate Verification with OCSP Checking

Issue summary: When a partial-chain certificate verification is enabled together with OCSP response checking for the whole chain, a NULL dereference will happen if the verified chain does not have a self-signed trusted anchor, crashing the process. Impact summary: A NULL pointer dereference can...

Siemens Products using OpenSSL

SUMMARY OpenSSL has published a stack based buffer overflow vulnerability that allows a remote attacker to cause a denial of service DoS or potentially allow for remote code execution. Siemens has released new versions for several affected products and recommends to update to the latest...

PKCS#12 Files with PBMAC1 Are Accepted with Short HMAC Keys

Issue Summary: The PKCS12 file processing fails to perform sufficient input validation for files that use Password-Based Message Authentication Code 1 PBMAC1 integrity mechanism allowing a certificate and private key forgery. Impact Summary: An attacker impersonating a user can cause a service...

Unbounded Memory Growth in the QUIC PATH_CHALLENGE Handler

Issue summary: Remote peer may exhaust heap memory of the QUIC server or client by flooding it with packets containing PATHCHALLENGE frames. Impact summary: A malicious remote peer can cause an unbounded memory allocation which can lead to an abnormal termination of the application acting as a QU...

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...

Possible Out of Bounds Read in X509_VERIFY_PARAM_set1_email()

Issue summary: When the X509VERIFYPARAMset1email is called by an application to validate a crafted e-mail address, such as during S/MIME message validation, an out of bounds read can happen. Impact summary: This out of bounds read will not directly exfiltrate the data read to the attacker so the...

Incorrect Tag Processing for Empty Messages in AES-GCM-SIV and AES-SIV modes

Issue summary: The implementations of AES-SIV RFC 5297 and AES-GCM-SIV RFC 8452 mishandle the authentication of AAD Additional Authenticated Data with an empty ciphertext allowing a forgery of such messages. Impact summary: An attacker can forge empty messages with arbitrary AAD to the victim’s...

Possible Heap Buffer Overflow in ASN.1 Multibyte String Conversion

Issue summary: A signed integer overflow when sizing the destination buffer for Unicode output in ASN1mbstringncopy can lead to a heap buffer overflow. Impact summary: A heap buffer overflow may lead to a crash or possibly attacker controlled code execution or other undefined behaviour. In...