The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2025:16115 advisory.

    * 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)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2025:16115 advisory.

    * 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)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-16a24364ce advisory.

    This updates gnutls to the latest upstream release. Notable changes are:

    * PKCS#11 cryptographic provider support
    * Support for kTLS rekeying with kernel 6.14+
    * Support for the almost standardized ML-DSA private key formats

    This also fixes 4 CVEs (CVE-2025-32989, CVE-2025-6395, CVE-2025-32988, and CVE-2025-32990).

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7635-1 advisory.

    It was discovered that GnuTLS incorrectly handled exporting Subject Alternative Name (SAN) entries     containing an otherName. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a     denial of service, or possibly execute arbitrary code. (CVE-2025-32988)

    It was discovered that GnuTLS incorrectly handled parsing the Certificate Transparency (CT) Signed     Certificate Timestamp (SCT) extension. A remote attacker could use this issue to cause GnuTLS to crash,     resulting in a denial of service, or possibly obtain sensitive information. (CVE-2025-32989)

    It was discovered that the GnuTLS certtool utility incorrectly handled parsing certain template files. An     attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly     execute arbitrary code. (CVE-2025-32990)

    Stefan Bhler discovered that GnuTLS incorrectly handled parsing certain template files. An attacker     could possibly use this issue to cause GnuTLS to crash, resulting in a denial of service. (CVE-2025-6395)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of gnutls installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-32989 advisory.

  - 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.
    (CVE-2025-32989)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of gnutls installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-32989 advisory.

  - 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.
    (CVE-2025-32989)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02595-1 advisory.

    - CVE-2025-6395: Fix NULL pointer dereference when 2nd Client Hello omits PSK (bsc#1246299)
    - CVE-2025-32988: Fix double-free due to incorrect ownership handling in the export logic of SAN entries     containing an otherName (bsc#1246232)
    - CVE-2025-32989: Fix heap buffer overread when handling the CT SCT extension during X.509 certificate     parsing (bsc#1246233)
    - CVE-2025-32990: Fix 1-byte heap buffer overflow when parsing templates with certtool (bsc#1246267)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2025:1766601879 advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The AlmaLinux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1782138503 advisory.

  - A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The     issue arises in merge_handshake_packet() where incoming handshake fragments are matched and merged based     solely on handshake type, without validating that the message_length field remains consistent across all     fragments of the same logical message. An attacker can exploit this by sending crafted DTLS fragments with     conflicting message_length values, causing the implementation to allocate a buffer based on a smaller     initial fragment and subsequently write beyond its bounds using larger, inconsistent fragments. Because     the merge operation does not enforce proper bounds checking against the allocated buffer size, this     results in an out-of-bounds write on the heap. The vulnerability is remotely exploitable without     authentication via the DTLS handshake path and can lead to application crashes or potential memory     corruption. (CVE-2026-33846)

  - 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 could lead to     unstable packet ordering or undefined behavior, resulting in a denial of service. (CVE-2026-42009)

  - A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly     ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker     could exploit this to bypass critical name constraint checks during certificate validation. This bypass     could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle     attacks against affected systems. (CVE-2026-42011)

  - 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 checking DNS     hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or     intercept sensitive information. (CVE-2026-42012)

  - 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 spoofing or     man-in-the-middle attacks. (CVE-2026-42013)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
269817	AlmaLinux 10 : gnutls (ALSA-2025:16115)	Nessus	Alma Linux Local Security Checks	10/9/2025	10/9/2025	high
269937	RockyLinux 10 : gnutls (RLSA-2025:16115)	Nessus	Rocky Linux Local Security Checks	10/10/2025	10/10/2025	high
242043	Fedora 42 : gnutls (2025-16a24364ce)	Nessus	Fedora Local Security Checks	7/13/2025	7/13/2025	medium
242198	Ubuntu 22.04 LTS / 24.04 LTS / 25.04 : GnuTLS vulnerabilities (USN-7635-1)	Nessus	Ubuntu Local Security Checks	7/16/2025	7/16/2025	medium
242852	CBL Mariner 2.0 Security Update: gnutls (CVE-2025-32989)	Nessus	MarinerOS Local Security Checks	7/25/2025	7/25/2025	medium
242860	Azure Linux 3.0 Security Update: gnutls (CVE-2025-32989)	Nessus	Azure Linux Local Security Checks	7/25/2025	9/15/2025	medium
243296	SUSE SLED15: gnutls / libgnutls-devel / libgnutls-devel-32bit / libgnutls30 / etc (SUSE-SU-2025:02595-1)	Nessus	SuSE Local Security Checks	8/2/2025	6/25/2026	high
361320	Rocky Linux 9.6 [TuxCare] Security Update: gnutls / gnutls-c++ / gnutls-dane / gnutls-devel / gnutls-utils (ALMALINUX9.6:CLSA-2025:1766601879)	Nessus	Rocky Linux Local Security Checks	10/1/2026	10/1/2026	medium
360244	AlmaLinux 9.2 [TuxCare] Security Update: gnutls / gnutls-c++ / gnutls-dane / gnutls-devel / gnutls-utils Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1782138503)	Nessus	Alma Linux Local Security Checks	10/1/2026	10/1/2026	high

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