gnutls: gnutls: Denial of Service via DTLS packet reordering vulnerability

A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security DTLS packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This...

gnutls: gnutls: Use-after-free in gnutls_pkcs11_token_set_pin

A flaw was found in GnuTLS. The gnutlspkcs11tokensetpin function, used for changing the Security Officer PIN, can lead to a use-after-free vulnerability. This occurs when an attacker attempts to change the PIN with a NULL old PIN for a token that lacks a protected authentication path...

gnutls: gnutls: Certificate validation bypass due to oversized Subject Alternative Name

A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name SAN could cause the validation process to incorrectly fall back to checking the Common Name CN field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to...

Important: Red Hat Security Advisory: gnutls security update

An update for gnutls is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the...

PT-2026-47001

An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutl...

Amazon Linux 2023 : gnutls, gnutls-c++, gnutls-dane (ALAS2023-2026-1757)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1757 advisory. GnuTLS didn't check that DTLS fragments claimed a consistent messagelength value. Additionally, a crucial array size check was missing, enabling an attacker to cause a heap overwrite...

GnuTLS 安全漏洞

GnuTLS is an open-source, free security communication library developed by GnuTLS that enables the implementation of SSL, TLS, and DTLS protocols. GnuTLS has a security vulnerability, which stems from a single-bit error in the bounds checking of PKCS12 package elements. This vulnerability could...

GnuTLS 安全漏洞

GnuTLS is an open-source, free security communication library developed by GnuTLS that enables the implementation of SSL, TLS, and DTLS protocols. GnuTLS libgnutls has a security vulnerability that stems from the transmission of extremely short pre-master keys during RSA key exchanges. This...

CVE-2026-42013: Improper Certificate Validation

A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name SAN could cause the validation process to incorrectly fall back to checking the Common Name CN field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to...

ALSA-2026:20611 Important: gnutls security update

Please update the gnutls packages to provide the GNU Transport Layer Security GnuTLS library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS. Security Fixes: gnutls: Add more checks to DTLS reassembly CVE-2026-33846 gnutls: Fix qsort comparator in DTLS reassemb...

ALSA-2026:20612 Important: gnutls security update

The gnutls packages provide the GNU Transport Layer Security GnuTLS library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS. Security Fixes: gnutls: Fix qsort comparator in DTLS reassembly CVE-2026-42009 gnutls: Fix crashing on an underflow with a DTLS datagram...

PT-2026-47002

A flaw was found in gnutls. A use after free issue in client sending key share extension may lead to memory corruption and other consequences...

Important: gnutls security update

Please update the gnutls packages to provide the GNU Transport Layer Security GnuTLS library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS. Security Fixes: gnutls: Add more checks to DTLS reassembly CVE-2026-33846 gnutls: Fix qsort comparator in DTLS reassemb...

GnuTLS 信任管理问题漏洞

GnuTLS is an open-source, free security communication library developed by GnuTLS. GnuTLS has a trust management vulnerability, which stems from the certificate verification process. Customized certificates may cause incorrect backtracking during the verification of the common name field,...

ALSA-2026:20613 Important: gnutls security update

The gnutls packages provide the GNU Transport Layer Security GnuTLS library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS. Security Fixes: gnutls: Fix qsort comparator in DTLS reassembly CVE-2026-42009 gnutls: Fix crashing on an underflow with a DTLS datagram...

CVE-2026-42012: Improper Certificate Validation

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...

PT-2026-47003

A flaw was found in gnutls. A use after free issue in client send params in lib/ext/pre shared key.c may lead to memory corruption and other potential consequences...

PT-2026-47000

GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3. The earliest affected version is 3.6.4 2018-09-24 because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS...

GnuTLS 安全漏洞

GnuTLS is an open-source, free security communication library developed by GnuTLS that enables the implementation of SSL, TLS, and DTLS protocols. There is a security vulnerability in gnutls. This vulnerability arises from the fact that using an excessively long subject alternative name during...

CVE-2026-42015: Off-by-one Error

A flaw was found in gnutls. An off-by-one error exists in the PKCS12 bag element bounds check. This vulnerability allows an remote attacker to write past the internal array of a PKCS12 bag when appending to a bag that already contains 32 elements. This memory corruption could lead to a denial of...