The vulnerability of the function nameconstraints_node_list_intersect() in the lib/x509/name_constraints.c file, lines 726-727, of the cryptographic library GnuTLS, allows a attacker to perform a MIT attack.

The vulnerability of the nameconstraintsnodelistintersect function in the lib/x509/nameconstraints.c file, lines 726-727, of the cryptographic library GnuTLS is related to errors in the certificate validation process. Exploiting this vulnerability could allow an attacker to perform a MITM attack...

The vulnerability of the DTLS implementation of the GnuTLS cryptographic library allows a attacker to induce a service failure.

The vulnerability of the DTLS protocol implementation of the GnuTLS cryptographic library is related to unpredictable behavior of functions due to inconsistencies in parameter values. Exploiting this vulnerability could allow a malicious actor to cause service failures remotely...

The vulnerability of the gnutls_x509_crt_check_hostname2() function in the lib/x509/hostname-verify.c file of the GnuTLS cryptographic library allows a attacker to perform a MITM attack.

The vulnerability of the gnutlsx509crtcheckhostname2 function in the lib/x509/hostname-verify.c file of the GnuTLS cryptographic library is related to errors in the certificate validation process. Exploiting this vulnerability could allow a remote attacker to perform a MITM attack...

EulerOS 2.0 SP12 : gnutls (EulerOS-SA-2026-2530)

According to the versions of the gnutls packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The issue arises in mergehandshakepacket...

EulerOS 2.0 SP12 : gnutls (EulerOS-SA-2026-2590)

According to the versions of the gnutls packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The issue arises in mergehandshakepacket...

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 SANs bsc1257960. CVE-2026-3833: incorrectly accepted domain names due to comparison during nam...

SUSE-SU-2026:2822-1 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 SANs bsc1257960. - CVE-2026-3833: incorrectly accepted domain names due to comparison during...

AlmaLinux 10 : gnutls (ALSA-2026:20613)

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:20613 advisory. gnutls: Fix qsort comparator in DTLS reassembly CVE-2026-42009 gnutls: Fix crashing on an underflow with a DTLS datagram CVE-2026-33845 gnutls: Fix...

The vulnerability of the merge_handshake_packet() function in the GnuTLS cryptographic library allows a attacker to trigger a denial-of-service attack.

The vulnerability of the mergehandshakepacket function in the GnuTLS cryptographic library is related to errors in processing parameter values related to input data length. Exploiting this vulnerability could allow a remote attacker to cause a service failure...

Important: Red Hat Security Advisory: OpenShift Container Platform 4.21.23 bug fix and security update

Red Hat OpenShift Container Platform release 4.21.23 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.21. Red Hat Product Security has rated this update as having a...

Important: Red Hat Security Advisory: OpenShift Container Platform 4.22.4 bug fix and security update

Red Hat OpenShift Container Platform release 4.22.4 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.22. Red Hat Product Security has rated this update as having a...

Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : GnuTLS vulnerabilities (USN-8502-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8502-1 advisory. It was discovered that GnuTLS had a timing side-channel when processing malformed ciphertexts in RSA-PSK ClientKeyExchange. A...

USN-8502-1: GnuTLS vulnerabilities

It was discovered that GnuTLS had a timing side-channel when processing malformed ciphertexts in RSA-PSK ClientKeyExchange. A remote attacker could possibly use this issue to recover sensitive information. This issue only affected Ubuntu 18.04 LTS. CVE-2024-0553 Bing Shi discovered that GnuTLS...

USN-8502-1 gnutls28 vulnerabilities

It was discovered that GnuTLS had a timing side-channel when processing malformed ciphertexts in RSA-PSK ClientKeyExchange. A remote attacker could possibly use this issue to recover sensitive information. This issue only affected Ubuntu 18.04 LTS. CVE-2024-0553 Bing Shi discovered that GnuTLS...

RHSA-2026:34372 Red Hat Security Advisory: gnutls security update

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AlmaLinux 9 : gnutls (ALSA-2026:20612)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:20612 advisory. gnutls: Fix qsort comparator in DTLS reassembly CVE-2026-42009 gnutls: Fix crashing on an underflow with a DTLS datagram CVE-2026-33845 gnutls: Fix RSA-P...

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...

Important: Red Hat Security Advisory: gnutls security update

An update for gnutls is now available for Red Hat Enterprise Linux 7 Extended Lifecycle 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 for...

gnutls: GnuTLS: Denial of Service via DTLS zero-length fragment

A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulting in an out-of-bounds read. This issue is remotely exploitable and may cause information disclosure or denial of service...

gnutls: GnuTLS: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly

A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The issue arises in mergehandshakepacket where incoming handshake fragments are matched and merged based solely on handshake type, without validating that the messagelength field remains...