Affected: AlmaLinux:10: gnutls, AlmaLinux:10: gnutls-c++, AlmaLinux:10: gnutls-dane, AlmaLinux:10: gnutls-devel, AlmaLinux:10: gnutls-fips, AlmaLinux:10: gnutls-utils

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

Security Fix(es):

* gnutls: Vulnerability in GnuTLS certtool template parsing (CVE-2025-32990) * gnutls: Vulnerability in GnuTLS SCT extension parsing (CVE-2025-32989) * gnutls: Vulnerability in GnuTLS otherName SAN export (CVE-2025-32988) * gnutls: NULL pointer dereference in _gnutls_figure_common_ciphersuite() (CVE-2025-6395)

Bug Fix(es) and Enhancement(s):

* gnutls: Vulnerability in GnuTLS certtool template parsing (BZ#2359620) * gnutls: Vulnerability in GnuTLS SCT extension parsing (BZ#2359621) * gnutls: Vulnerability in GnuTLS otherName SAN export (BZ#2359622) * gnutls: NULL pointer dereference in _gnutls_figure_common_ciphersuite() (BZ#2376755)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected: Alpaquita:23: gnutls, Alpaquita:25: gnutls, Alpaquita:stream: gnutls

A heap-buffer-overread vulnerability was found in GnuTLS in how it handles the Certificate Transparency (CT) Signed Certificate Timestamp (SCT) extension during X.509 certificate parsing. This flaw allows a malicious user to create a certificate containing a malformed SCT extension (OID 1.3.6.1.4.1.11129.2.4.2) that contains sensitive data. This issue leads to the exposure of confidential information when GnuTLS verifies certificates from certain websites when the certificate (SCT) is not checked correctly.

A heap-buffer-overread vulnerability was found in GnuTLS in how it handles the Certificate Transparency (CT) Signed Certificate Timestamp (SCT) extension during X.509 certificate parsing. This flaw allows a malicious user to create a certificate containing a malformed SCT extension (OID 1.3.6.1.4.1.11129.2.4.2) that contains sensitive data. This issue leads to the exposure of confidential information when GnuTLS verifies certificates from certain websites when the certificate (SCT) is not checked correctly.

sshd in OpenSSH 6.2 through 8.x before 8.8, when certain non-default configurations are used, allows privilege escalation because supplemental groups are not initialized as expected. Helper programs for AuthorizedKeysCommand and AuthorizedPrincipalsCommand may run with privileges associated with group memberships of the sshd process, if the configuration specifies running the command as a different user. A flaw was found in glibc. When the getaddrinfo function is called with the AF_UNSPEC address family and the system is configured with no-aaaa mode via /etc/resolv.conf, a DNS response via TCP larger than 2048 bytes can potentially disclose stack contents through the function returned address data, and may cause a crash. A flaw was found in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the _nss_*_gethostbyname2_r and _nss_*_getcanonname_r hooks without implementing the _nss_*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags. A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment var…

Affected: openEuler:24.03-LTS: gnutls

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 required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code. Security Fix(es):

A vulnerability, which was classified as critical, was found in GnuTLS (Network Encryption Software) (affected version unknown).CWE is classifying the issue as CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.This is going to have an impact on confidentiality, integrity, and availability.There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.(CVE-2025-32988)

GnuTLS is a free secure communication library for implementing SSL, TLS and DTLS protocols open source. GnuTLS has a trust management vulnerability, which originated from improper processing of CT SCT SCT expansion during X.509 certificate resolution, which may lead to information leakage.(CVE-2025-32989)

GnuTLS is a free secure communication library for implemen…

gnutls-3.8.10-1.1 on GA media

gnutls: NULL pointer dereference in _gnutls_figure_common_ciphersuite() gnutls: Vulnerability in GnuTLS otherName SAN export gnutls: Vulnerability in GnuTLS SCT extension parsing gnutls: Vulnerability in GnuTLS certtool template parsing

Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version V3.1.5 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant).

Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends specific countermeasures for products where fixes are not, or not yet available.

Note: This SSA advises vulnerabilities for firmware version V3.1.5 only; for version V3.1.6 refer to SSA-019113.

Security update for gnutls

Affected: Ubuntu:22.04:LTS: gnutls28, Ubuntu:Pro:FIPS-preview:22.04:LTS: gnutls28, Ubuntu:Pro:FIPS-updates:22.04:LTS: gnutls28, Ubuntu:24.04:LTS: gnutls28, Ubuntu:Pro:FIPS-updates:24.04:LTS: gnutls28, Ubuntu:25.10: gnutls28

A heap-buffer-overread vulnerability was found in GnuTLS in how it handles the Certificate Transparency (CT) Signed Certificate Timestamp (SCT) extension during X.509 certificate parsing. This flaw allows a malicious user to create a certificate containing a malformed SCT extension (OID 1.3.6.1.4.1.11129.2.4.2) that contains sensitive data. This issue leads to the exposure of confidential information when GnuTLS verifies certificates from certain websites when the certificate (SCT) is not checked correctly.

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in GnuTLS ausnutzen, um einen Denial of Service Angriff durchzuführen oder Informationen offenzulegen.