CVE-2026-91769: Improper Validation of Certificate with Host Mismatch

PHP's OpenSSL stream peer verification checks the certificate's subjectAltName entries first and, whenever no entry matches, falls back to the Common Name. RFC 6125 requires the CN to be ignored once the certificate presents any service identity, so a certificate carrying a non-matching DNS SAN w...

CVE-2026-91767: Heap-based Buffer Overflow

phpopensslmatcheswildcardname in ext/openssl/xpssl.c underflows the length argument passed to memchr when a TLS server certificate presents a wildcard name whose literal characters are together longer than the hostname being verified. A malicious server presenting such a certificate makes the PHP...

Debian dla-4795 : libcrypto3-udeb - security update

The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4795 advisory. - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4795-1 [email protected]...

[slackware-security] php

New php packages are available for Slackware 15.0 and -current to fix security issues. Here are the details from the Slackware 15.0 ChangeLog: extra/php82/php82-8.2.34-i586-1slack15.0.txz: Upgraded. This update fixes security issues: FPM: IPv6 ACL bypass in FastCGI listen.allowedclients due to...

io.netty/netty-handler: Netty: TLS hostname verification bypass via OpenSSL client path misconfiguration

A flaw was found in Netty io.netty:netty-handler. When using the SslProvider.OPENSSL client path with a plain X509TrustManager and without Unsafe-based trust-manager wrapping Java 25+, TLS hostname verification is disabled. This misconfiguration allows a man-in-the-middle attacker to present a...

SUSE CVE-2026-73581

Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0-M1 through...

openssl: Unbounded Memory Growth in the QUIC PATH_CHALLENGE Handler

A flaw was found in OpenSSL's QUIC PATHCHALLENGE handler. A remote attacker can exploit this vulnerability by flooding a QUIC client or server with specially crafted PATHCHALLENGE frames. This leads to unbounded memory allocation within the local QUIC stack, as the system continuously allocates...

Important: Red Hat Security Advisory: openssl security update

An update for openssl is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available fo...

openssl: AES-OCB IV Ignored on EVP_Cipher() Path

A flaw was found in OpenSSL. Applications that use the AES-OCB encryption method with a specific one-shot interface EVPCipher will have their provided Initialization Vector IV silently discarded. This leads to the same internal cryptographic value being used repeatedly, which compromises the...

openssl: CMS AuthEnvelopedData Processing May Accept Forged Messages

A flaw was found in OpenSSL's Cryptographic Message Services CMS AuthEnvelopedData processing. An on-path attacker can exploit insufficient input validation on cipher and tag length fields by sending specially crafted CMS messages. This can lead to the forging of messages or bypassing integrity...

openssl: Heap Use-After-Free in OpenSSL PKCS7_verify()

A flaw was found in OpenSSL. When processing a specially crafted PKCS7 or S/MIME Secure/Multipurpose Internet Mail Extensions signed message, a heap use-after-free vulnerability in the PKCS7verify function can be triggered. This occurs if the SignedData digestAlgorithms field is present as an emp...

openssl: OpenSSL: Information disclosure and data tampering via specific low-level OCB encryption/decryption calls

A flaw was found in OpenSSL. When applications directly call the low-level CRYPTOocb128encrypt or CRYPTOocb128decrypt functions with non-block-aligned lengths in a single call on hardware-accelerated builds, the trailing 1-15 bytes of a message may be exposed in cleartext. These exposed bytes are...

openssl: openssl: Information Disclosure from Uninitialized Memory via Invalid RSA Public Key

A flaw was found in openssl. Applications that use RSASVE key encapsulation, a method for securely exchanging encryption keys, may inadvertently expose sensitive data. This vulnerability arises when an application processes a malicious, invalid RSA public key provided by an attacker without prope...

openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing

A flaw was found in OpenSSL. A remote attacker could exploit this vulnerability by sending a specially crafted Cryptographic Message Syntax CMS EnvelopedData message. During the processing of a KeyTransportRecipientInfo with RSA-OAEP encryption, the system attempts to access an optional parameter...

Security Bulletin: This Power System update is being released to address CVE-2026-45447

Summary An authenticated administrator user uploading a specially crafted certificate to the BMC can lead to loss of integrity or remote code execution. Vulnerability Details CVEID:CVE-2026-45447 DESCRIPTION: Issue summary: A specially crafted PKCS7 or S/MIME signed message could trigger a...

PT-2026-98286

Name of the Vulnerable Software and Affected Versions PHP affected versions not specified Description The function php openssl matches wildcard name in ext/openssl/xp ssl.c contains an integer underflow in the length argument passed to memchr. This occurs when a TLS server certificate uses a...

Linux Distros Unpatched Vulnerability : CVE-2026-73581

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses...

PT-2026-98288

Name of the Vulnerable Software and Affected Versions PHP affected versions not specified Description OpenSSL stream peer verification incorrectly handles certificate validation by falling back to the Common Name CN when no entries in the subjectAltName SAN match. According to RFC 6125, the CN...

RHEL 10 : openssl (RHSA-2026:71542)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:71542 advisory. OpenSSL is a toolkit that implements the Secure Sockets Layer SSL and Transport Layer Security TLS protocols, as well as a full-strength...

CVE-2026-86246 Apache Tomcat Native: Insecure OpenSSL options enabled

Initialization of a resource with an insecure default vulnerability in Apache Tomcat Native enabled insecure options by default including ALLOWCLIENTRENEGOTIATION, NOEXTENDEDMASTERSECRET, IGNOREUNEXPECTEDEOF and ALLOWNODHEKEX. This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, fr...