EulerOS Virtualization 2.10.1 : gnutls (EulerOS-SA-2026-2021)

According to the versions of the gnutls packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : A flaw was found in GnuTLS. This vulnerability allows a denial of service DoS by excessive CPU Central Processing Unit and memory...

PT-2026-45962

crypton-x509-validation and crypton-x509 do not enforce X.509 Name Constraints The crypton-x509-validation and crypton-x509 libraries did not enforce the X.509 Name Constraints extension during certificate validation. The Name Constraints extension is a critical X.509 extension that restricts the...

CVE-2026-27145

x509.Certificate.VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name SAN entries. This caused strings.Splithost, "." to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically based on the number...

GO-2026-5037 Inefficient candidate hostname parsing in crypto/x509

x509.Certificate.VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name SAN entries. This caused strings.Splithost, "." to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically based on the number...

CVE-2026-42790 nameConstraints DNS bypass via subject CommonName fallback in public_key hostname verification

Improper Certificate Validation vulnerability in Erlang OTP publickey pubkeycert and publickey modules allows a DNS nameConstraints bypass via subject CommonName fallback in TLS hostname verification. Two flaws combine to allow a subordinate CA whose DNS nameConstraints are restricted e.g...

CVE-2026-42012

CVE-2026-42012 affects the GnuTLS library. A remote attacker can craft a certificate with URI or SRV SANs that causes the validator to fall back to CN checks, bypassing proper SAN validation and enabling potential impersonation/MITM. Documented in multiple advisories and patches across distros: o...

CVE-2026-42012

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier URI or Service SRV Subject Alternative Names SANs. This could cause the certificate validation process to incorrectly fall back to...

EUVD-2026-32010

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier URI or Service SRV Subject Alternative Names SANs. This could cause the certificate validation process to incorrectly fall back to...

crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application

A flaw was found in the crypto/x509 package within Go golang. When verifying a certificate chain, excluded DNS Domain Name System constraints are not correctly applied to wildcard DNS Subject Alternative Names SANs if the case of the SAN differs from the constraint. This oversight could allow an...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: golang (UTSA-2026-016811)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-016811 advisory. An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes...

Astra Linux - уязвимость в gnutls28

A flaw was discovered in GnuTLS. This vulnerability allows for a denial of service attack through excessive CPU usage and memory consumption, caused by specially crafted malicious certificates that contain a large number of name constraints and Subject Alternative Names SANs...

CLEANSTART-2026-QO20135 When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint

Multiple security vulnerabilities affect the minio-operator-fips package. When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. See references for individual...

gnutls: GnuTLS: Denial of Service via excessive resource consumption during certificate verification

A flaw was found in GnuTLS. This vulnerability allows a denial of service DoS by excessive CPU Central Processing Unit and memory consumption via specially crafted malicious certificates containing a large number of name constraints and subject alternative names SANs...

gnutls: GnuTLS: Denial of Service via excessive resource consumption during certificate verification

A flaw was found in GnuTLS. This vulnerability allows a denial of service DoS by excessive CPU Central Processing Unit and memory consumption via specially crafted malicious certificates containing a large number of name constraints and subject alternative names SANs...

gnutls: GnuTLS: Denial of Service via excessive resource consumption during certificate verification

A flaw was found in GnuTLS. This vulnerability allows a denial of service DoS by excessive CPU Central Processing Unit and memory consumption via specially crafted malicious certificates containing a large number of name constraints and subject alternative names SANs...

gnutls: GnuTLS: Denial of Service via excessive resource consumption during certificate verification

A flaw was found in GnuTLS. This vulnerability allows a denial of service DoS by excessive CPU Central Processing Unit and memory consumption via specially crafted malicious certificates containing a large number of name constraints and subject alternative names SANs...

Amazon Linux 2023 : gnutls, gnutls-c++, gnutls-dane (ALAS2023-2026-1529)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1529 advisory. A flaw was found in GnuTLS. This vulnerability allows a denial of service DoS by excessive CPU Central Processing Unit and memory consumption via specially crafted malicious certificates containing a...

gnutls: GnuTLS: Denial of Service via excessive resource consumption during certificate verification

A flaw was found in GnuTLS. This vulnerability allows a denial of service DoS by excessive CPU Central Processing Unit and memory consumption via specially crafted malicious certificates containing a large number of name constraints and subject alternative names SANs...

OESA-2026-1650 gnutls security update

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface API to access the secure communications protocols as well as APIs to parse and write X.509, PKCS 12, and other...

Security update for gnutls

This update for gnutls fixes the following issues: CVE-2025-14831: excessive resource consumption when verifying specially crafted malicious certificates containing a large number of name constraints and subject alternative names SANs bsc1257960. Patch Instructions: To install this SUSE update us...