gnutls: gnutls: Information disclosure via heap overread in RSA key exchange

A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure...

Cisco ASA IKEv1/IKEv2 Buffer Overflow (CVE-2016-1287)

A vulnerability in the Internet Key Exchange IKE version 1 v1 and IKE version 2 v2 code of Cisco ASA Software could allow an unauthenticated, remote attacker to cause a reload of the affected system or to remotely execute code. The vulnerability is due to a buffer overflow in the affected code...

Libreswan 4.6 < 5.3.1 DoS

The version of Libreswan installed on the remote host is between 4.6 and 5.3.1 exclusive. It is, therefore, affected by a denial of service vulnerability. An invalidly formatted IKEv2 fragment causes the Libreswan pluto daemon to crash and restart. The function reassemblev2incomingfragments would...

Oracle Linux 10 : openssh (ELSA-2026-19069)

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-19069 advisory. - CVE-2026-35385: Fix privilege escalation via scp legacy protocol when not in preserving file mode Resolves: RHEL-164739 - CVE-2026-35388: Add...

Key Exchange without Entity Authentication

Overview Affected versions of this package are vulnerable to Key Exchange without Entity Authentication through contrib/paramikovendor.py in the SSH connection path. An attacker can intercept or impersonate an SSH server and have the client connect without validating the server’s host key by...

JLSEC-2026-701

In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TLS 1.2 server state machine implementation. The server could incorrectly accept the CertificateVerify message before the ClientKeyExchange message had been received. This issue affects wolfSSL before 5.8.4 wolfSSL 5.8.2 and earlier is...

JLSEC-2026-713

Heap-based buffer overflow in the KCAPI ECC code path of wceccimportx963ex in wolfSSL wolfcrypt allows a remote attacker to write attacker-controlled data past the bounds of the pubkeyraw buffer via a crafted oversized EC public key point. The WOLFSSLKCAPIECC code path copies the input to...

CVE-2026-50696

Heap-based buffer overflow in Windows Internet Key Exchange IKE Protocol allows an unauthorized attacker to deny service over a network...

CVE-2026-50696

CVE-2026-50696 is a heap-based buffer overflow in the Windows Internet Key Exchange (IKE) Protocol that allows an unauthenticated, network-based attacker to cause a denial of service. The vulnerability is documented across several sources (NVD and CVE records), with a CVSS v3.1 base score of 7.5 ...

CVE-2026-50696 Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability

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CVE-2026-50696 Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability

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openssl: OpenSSL TLS 1.3 server may choose unexpected key agreement group

A key group selection preference flaw has been discovered in OpenSSL. An OpenSSL TLS 1.3 server may fail to negotiate the expected preferred key exchange group when its key exchange group configuration includes the default by using the "DEFAULT" keyword. A less preferred key exchange may be used...

Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability

Heap-based buffer overflow in Windows Internet Key Exchange IKE Protocol allows an unauthorized attacker to deny service over a network...

CVE-2026-50722

A flaw was found in Libreswan's implementation of IKEv2 authentication when processing signatures utilizing the RSASSA-PKCS1-v15 scheme. The RSAauthenticatehashsignaturepkcs115rsa function does not correctly validate the DER encoding of the ASN.1 digest. A remote, unauthenticated attacker could...

PT-2026-58216

Name of the Vulnerable Software and Affected Versions Windows Internet Key Exchange IKE Protocol affected versions not specified Description A heap-based buffer overflow exists in the Windows Internet Key Exchange IKE Protocol. This issue allows an unauthorized network attacker to cause a denial ...

OESA-2026-2910 libreswan security update

Libreswan is an implementation of IKEv1 and IKEv2 for IPsec. IPsec is the Internet Protocol Security and uses strong cryptography to provide both authentication and encryption services. These services allow you to build secure tunnels through untrusted networks. Everything passing through the...

OESA-2026-2909 libreswan security update

Libreswan is an implementation of IKEv1 and IKEv2 for IPsec. IPsec is the Internet Protocol Security and uses strong cryptography to provide both authentication and encryption services. These services allow you to build secure tunnels through untrusted networks. Everything passing through the...

Pion DTLS: Denial of service via panic while parsing a crafted ECDHE_PSK ServerKeyExchange message

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Fedora 44 : openssh (2026-a80275b42d)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-a80275b42d advisory. Improve GSS KEX algorithms documentation ---- - CVE-2026-55653: Fix double free in openssh DH-GEX client path during FIPS known-group validation tha...

Cisco Adaptive Security Appliance Software, Firepower Threat Defense Software, IOS Software, and IOS XE Software IKEv2 DoS (cisco-sa-multiprod-ikev2-dos-gPctUqv2)

According to its self-reported version, Cisco IOS Software is affected by a vulnerability. - A vulnerability in the Internet Key Exchange version 2 IKEv2 protocol processing of Cisco Adaptive Security Appliance ASA Software, Cisco Firepower Threat Defense FTD Software, Cisco IOS Software, and Cis...