SSH-Weak-DH

About This tool creates SSH connections to a server and goes through different client configurations to check if the server permits a Diffie-Hellman DH key exchange using a weak group. We aim for our tool to help assess SSH servers for weak DH key exchange settings. Please be aware that this tool...

openssh: Double free in Red Hat Enterprise Linux versions of OpenSSH DH-GEX client path during FIPS known-group validation leads to client-side denial of service

A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange DH-GEX client path. This occurs during FIPS Federal Information Processing Standards mode known-group validation when the client processes attacker-controlled DH-GEX...

openssh: Double free in Red Hat Enterprise Linux versions of OpenSSH DH-GEX client path during FIPS known-group validation leads to client-side denial of service

A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange DH-GEX client path. This occurs during FIPS Federal Information Processing Standards mode known-group validation when the client processes attacker-controlled DH-GEX...

openssh: Double free in Red Hat Enterprise Linux versions of OpenSSH DH-GEX client path during FIPS known-group validation leads to client-side denial of service

A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange DH-GEX client path. This occurs during FIPS Federal Information Processing Standards mode known-group validation when the client processes attacker-controlled DH-GEX...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: Assign dhkey to NULL after kfreesensitive. ctrl-dhkey may be used across multiple calls to nvmetsetupdhgroup for the same controller. Therefore, it’s better to set it to NULL after a error-free release, in order to...

Astra Linux – Vulnerability in StrongSwan

StrongSwan before version 5.9.12 has a buffer overflow vulnerability, and there is a possibility of unauthenticated remote code execution through a DH public key value that exceeds the internal buffer of charon-tkm’s DH proxy. The earliest affected version is 5.3.0. An attack can occur through a...

Rocky Linux 8 [CIQ] Security Update: openssh / openssh-askpass / openssh-askpass-debuginfo / etc Multiple Vulnerabilities (crlsa-2026_47755)

The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-202647755 advisory. openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in Rocky Linux OpenSSH client versions CVE-2026-55655 openssh: Double free in...

Rocky Linux 8 [CIQ] Security Update: openssl / openssl-debuginfo / openssl-debugsource / openssl-devel / etc Multiple Vulnerabilities (crlsa-2023_7877)

The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-20237877 advisory. openssl: Excessive time spent checking DH keys and parameters CVE-2023-3446 OpenSSL: Excessive time spent checking DH q parameter value CVE-2023-3817...

Rocky Linux 9.6 [TuxCare] Security Update: openssh / openssh-askpass / openssh-clients / openssh-keycat / etc (ALMALINUX9.6:CLSA-2026:1783706054)

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1783706054 advisory. - A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie- Hellman Group Exchange DH-GEX...

AlmaLinux 9.2 [TuxCare] Security Update: openssh / openssh-askpass / openssh-clients / openssh-keycat / etc (ALMALINUX9.2:CLSA-2026:1783694178)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1783694178 advisory. - A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie- Hellman Group Exchange DH-GEX...

AlmaLinux 9.6 [TuxCare] Security Update: openssh / openssh-askpass / openssh-clients / openssh-keycat / etc (ALMALINUX9.6:CLSA-2026:1783706054)

The AlmaLinux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1783706054 advisory. - A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie- Hellman Group Exchange DH-GEX...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: shim (UTSA-2026-091452)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-091452 advisory. During key agreement in a TLS handshake using a DHE based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client ...

SUSE CVE-2026-90230

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix heap out-of-bounds read in nvmetauthnegotiate nvmetexecuteauthsend allocates the DH-HMAC-CHAP message buffer with the host-supplied transfer length tl and hands it to nvmetauthnegotiate without passing tl along...

AZL-102626 CVE-2026-90230 affecting package kernel for versions less than 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix heap out-of-bounds read in nvmetauthnegotiate nvmetexecuteauthsend allocates the DH-HMAC-CHAP message buffer with the host-supplied transfer length tl and hands it to nvmetauthnegotiate without passing tl along...

CVE-2026-90230 nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix heap out-of-bounds read in nvmetauthnegotiate nvmetexecuteauthsend allocates the DH-HMAC-CHAP message buffer with the host-supplied transfer length tl and hands it to nvmetauthnegotiate without passing tl along...

CVE-2026-90230: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix heap out-of-bounds read in nvmetauthnegotiate nvmetexecuteauthsend allocates the DH-HMAC-CHAP message buffer with the host-supplied transfer length tl and hands it to nvmetauthnegotiate without passing tl along...

PT-2026-94578

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A heap out-of-bounds read exists in the nvmet auth negotiate function. The nvmet execute auth send function allocates a DH-HMAC-CHAP message buffer using a host-supplied transfer length ...

Astra Linux – Vulnerability in OpenSSL

Issue summary: Checking excessively long DH keys or parameters can be very slow. Applications that use functions such as DHcheck, DHcheckex, or EVPPKEYparamcheck to check DH keys or parameters may experience prolonged delays. If the keys or parameters being checked were obtained from an untrusted...

Astra Linux – Vulnerability in OpenSSL

Issue summary: Generating excessively long X9.42 DH keys or checking overly long X9.42 DH keys or parameters can be very slow. Applications that use functions like DHgeneratekey to generate an X9.42 DH key may experience prolonged delays. Similarly, applications that use functions like...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-053299)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-053299 advisory. In the Linux kernel, the following vulnerability has been resolved: crypto: qat - add param check for DH Reject requests with a source buffer that is bigger than the...