Gnu Gnutls
75 CVEs affecting Gnu Gnutls. Latest disclosed: 2026-05-18. Critical: 6, High: 17.
| CVE | Severity | Score | Published | Summary |
|---|---|---|---|---|
CVE-2021-20232 | Critical | 9.8 | 2021-03-12 | 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 conseque… |
CVE-2021-20231 | Critical | 9.8 | 2021-03-12 | 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. |
CVE-2017-5337 | Critical | 9.8 | 2017-03-24 | Multiple heap-based buffer overflows in the read_attribute function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allow remote attackers to have unspecified i… |
CVE-2017-5336 | Critical | 9.8 | 2017-03-24 | Stack-based buffer overflow in the cdk_pk_get_keyid function in lib/opencdk/pubkey.c in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allows remote attackers to… |
CVE-2017-5334 | Critical | 9.8 | 2017-03-24 | Double free vulnerability in the gnutls_x509_ext_import_proxy function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allows remote attackers to have unspecifi… |
CVE-2009-3555 | Critical | 9.8 | 2009-11-09 | The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Serve… |
CVE-2026-42009 | High | 7.5 | 2026-05-18 | 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 fu… |
CVE-2026-33845 | High | 7.5 | 2026-04-30 | 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… |
CVE-2026-1584 | High | 7.5 | 2026-04-09 | A flaw was found in gnutls. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted ClientHello message with an invali… |
CVE-2024-0567 | High | 7.5 | 2024-01-16 | A vulnerability was found in GnuTLS, where a cockpit (which uses gnuTLS) rejects a certificate chain with distributed trust. This issue occurs when validating… |
CVE-2024-0553 | High | 7.5 | 2024-01-16 | A vulnerability was found in GnuTLS. The response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from the response times of ciphertexts wit… |
CVE-2022-2509 | High | 7.5 | 2022-08-01 | A vulnerability found in gnutls. This security flaw happens because of a double free error occurs during verification of pkcs7 signatures in gnutls_pkcs7_verif… |
CVE-2020-24659 | High | 7.5 | 2020-09-04 | 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 u… |
CVE-2015-0294 | High | 7.5 | 2020-01-27 | GnuTLS before 3.3.13 does not validate that the signature algorithms match when importing a certificate. |
CVE-2016-4456 | High | 7.5 | 2017-08-08 | The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12 allows remote attackers to overwrite and corrupt arbitrary files in the filesystem. |
CVE-2017-7507 | High | 7.5 | 2017-06-16 | GnuTLS version 3.5.12 and earlier is vulnerable to a NULL pointer dereference while decoding a status response TLS extension with valid contents. This could le… |
CVE-2017-7869 | High | 7.5 | 2017-04-14 | GnuTLS before 2017-02-20 has an out-of-bounds write caused by an integer overflow and heap-based buffer overflow related to the cdk_pkt_read function in opencd… |
CVE-2017-5335 | High | 7.5 | 2017-03-24 | The stream reading functions in lib/opencdk/read-packet.c in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allow remote attackers to cause a denial of service (o… |
CVE-2016-7444 | High | 7.5 | 2016-09-27 | The gnutls_ocsp_resp_check_crt function in lib/x509/ocsp.c in GnuTLS before 3.4.15 and 3.5.x before 3.5.4 does not verify the serial length of an OCSP response… |
CVE-2023-0361 | High | 7.4 | 2023-02-15 | A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encryp… |