The vulnerabilities of the negotiation mechanisms for SSL and GSS in the PostgreSQL database management system allow attackers to induce service failures.

The vulnerability of the negotiation mechanisms for SSL and GSS in the PostgreSQL database management system is related to an uncontrolled recursion. Exploiting this vulnerability can allow a malicious actor, operating remotely, to cause service interruptions...

krb5: MIT Kerberos 5 (krb5): Denial of Service via integer underflow and out-of-bounds read

A flaw was found in MIT Kerberos 5 krb5. An unauthenticated remote attacker can exploit an integer underflow and an out-of-bounds read vulnerability by calling gssacceptseccontext on a system with a NegoEx mechanism registered. This can lead to the process terminating, resulting in a Denial of...

CVE-2026-6691

A flaw was found in the MongoDB C Driver's Cyrus SASL integration. This vulnerability, a heap buffer overflow, occurs due to unsafe string copying during username canonicalization. A remote attacker can exploit this by providing untrusted input in the username of a MongoDB URI with...

Uncontrolled Recursion

Overview Affected versions of this package are vulnerable to Uncontrolled Recursion through the SSL or GSS negotiation process. An attacker can cause the service to become unresponsive by triggering uncontrolled recursion when connecting to an AFUNIX socket. If both SSL and GSS are disabled, the...

CVE-2026-6479

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AFUNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18....

CVE-2026-6479

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AFUNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18....

CVE-2026-6479 PostgreSQL SSL/GSS init causes denial of service, via uncontrolled recursion

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AFUNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18....

CVE-2026-6479

CVE-2026-6479 affects PostgreSQL: uncontrolled recursion during SSL/GSS negotiation can cause sustained denial of service. Affected are versions older than 18.4, 17.10, 16.14, 15.18, and 14.23. An attacker connected to a PostgreSQL AF_UNIX socket can trigger the issue; if SSL and GSS are both dis...

CLSA-2026-1778490111 libssh: Fix of CVE-2026-0966

CVE-2026-0966: fix heap buffer underflow in sshgethexa on NULL or zero-length input, remotely reachable via GSSAPI authentication logging...

openssh: OpenSSH GSSAPI: Information disclosure or denial of service due to uninitialized variables

A flaw was found in the OpenSSH GSSAPI Generic Security Service Application Program Interface delta patches, as included in various Linux distributions. A remote attacker could exploit this by sending an unexpected GSSAPI message type during the key exchange process. This occurs because the...

openssh: OpenSSH GSSAPI: Information disclosure or denial of service due to uninitialized variables

A flaw was found in the OpenSSH GSSAPI Generic Security Service Application Program Interface delta patches, as included in various Linux distributions. A remote attacker could exploit this by sending an unexpected GSSAPI message type during the key exchange process. This occurs because the...

CVE-2026-43862

In mutt before 2.3.2, the imapauthgss security level is mishandled...

PT-2026-36775

Name of the Vulnerable Software and Affected Versions mutt versions prior to 2.3.2 Description The imap auth gss security level is mishandled. Recommendations Update to version 2.3.2...

openssh: OpenSSH GSSAPI: Information disclosure or denial of service due to uninitialized variables

A flaw was found in the OpenSSH GSSAPI Generic Security Service Application Program Interface delta patches, as included in various Linux distributions. A remote attacker could exploit this by sending an unexpected GSSAPI message type during the key exchange process. This occurs because the...

openssh: OpenSSH GSSAPI: Information disclosure or denial of service due to uninitialized variables

A flaw was found in the OpenSSH GSSAPI Generic Security Service Application Program Interface delta patches, as included in various Linux distributions. A remote attacker could exploit this by sending an unexpected GSSAPI message type during the key exchange process. This occurs because the...

golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via unbounded memory consumption in GSSAPI authentication

A flaw was found in golang.org/x/crypto/ssh. An attacker can exploit this vulnerability by sending specially crafted GSSAPI Generic Security Service Application Program Interface authentication requests to an SSH Secure Shell server. The server fails to validate the number of mechanisms specified...

golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via unbounded memory consumption in GSSAPI authentication

A flaw was found in golang.org/x/crypto/ssh. An attacker can exploit this vulnerability by sending specially crafted GSSAPI Generic Security Service Application Program Interface authentication requests to an SSH Secure Shell server. The server fails to validate the number of mechanisms specified...

RLSA-2026:6461 Important: openssh security update

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server. Security Fixes: openssh: OpenSSH GSSAPI: Information disclosure or denial of service due to uninitialized...

openssh: OpenSSH GSSAPI: Information disclosure or denial of service due to uninitialized variables

A flaw was found in the OpenSSH GSSAPI Generic Security Service Application Program Interface delta patches, as included in various Linux distributions. A remote attacker could exploit this by sending an unexpected GSSAPI message type during the key exchange process. This occurs because the...

[SECURITY] Fedora 42 Update: libgsasl-1.10.0-15.fc42

The library includes support for the SASL framework and at least partial support for the CRAM-MD5, EXTERNAL, GSSAPI, ANONYMOUS, PLAIN, SECURID, DIGEST-MD5, LOGIN, and NTLM mechanisms...