OPENSUSE-SU-2026:21861-1 Security update for gh

This update for gh fixes the following issues: Changes in gh: Update to version 2.100.0, fixing two deadlock issues in the vendored golang.org/x/crypto/ssh library reachable via crafted SSH channel messages CVE-2026-56854, CVE-2026-56855, CVE-2026-78662, bsc1278604: Fix gh api telemetry disableme...

SUSE-SU-2026:23841-1 Security update for google-osconfig-agent

This update for google-osconfig-agent fixes the following issue: - CVE-2026-56854: golang.org/x/crypto/ssh: authentication bypass and deadlocks in the crypto/ssh library bsc1278597. - CVE-2026-56855: golang.org/x/crypto/ssh: authentication bypass and deadlocks in the crypto/ssh library bsc1278597...

golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted AES-GCM packet decoder inputs

A flaw was found in golang.org/x/crypto/ssh. A remote attacker could send specially crafted inputs to the AES-GCM packet decoder. This could lead to an incorrectly placed cast from bytes to an integer, causing a server-side panic and resulting in a Denial of Service DoS for the affected system...

golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses

A flaw was found in golang.org/x/crypto/ssh. A remote malicious SSH peer can exploit this by sending unsolicited global request responses, which fills an internal buffer and blocks the connection's read loop. This prevents the associated resources from being released, leading to a resource leak p...

golang.org/x/crypto/ssh/agent: golang.org/x/crypto/ssh/agent: Security bypass due to improper handling of key restrictions

A flaw was found in golang.org/x/crypto/ssh/agent. When a key was added to a remote agent, security restrictions, known as constraint extensions, were not properly processed during the request. This allowed these restrictions to be silently removed when keys were forwarded, leading to the...

golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted public key with excessive parameters

A flaw was found in golang.org/x/crypto/ssh. The RSA and DSA public key parsers in the affected component did not enforce size limits on key parameters. This vulnerability allows an unauthenticated client to provide a crafted public key with an excessively large modulus or DSA parameter during...

Important: Red Hat Security Advisory: podman security update

An update for podman is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...

RHEL 9 : podman (RHSA-2026:67450)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:67450 advisory. The podman tool manages pods, container images, and containers. It is part of the libpod library, which is for applications that use...

golang.org/x/crypto/ssh: golang: golang.org/x/crypto/ssh: Denial of Service due to integer overflow in SSH channel write

A flaw was found in golang.org/x/crypto/ssh. When a remote attacker attempts to write data larger than 4GB in a single call on an SSH Secure Shell channel, an integer overflow occurs in the internal payload size calculation. This vulnerability causes the write loop to spin indefinitely,...

golang.org/x/crypto/ssh: golang: golang.org/x/crypto/ssh: Denial of Service via crafted SSH certificate

A flaw was found in golang.org/x/crypto/ssh. SSH servers configured to use CertChecker as a public key callback, without explicitly setting IsUserAuthority or IsHostAuthority, are vulnerable. A remote attacker can exploit this by presenting a specially crafted certificate, causing the server to...

golang.org/x/crypto/ssh: golang: golang.org/x/crypto/ssh: Denial of Service via repeated rejected channel openings

A flaw was found in golang.org/x/crypto/ssh. An authenticated SSH client can cause a Denial of Service DoS by repeatedly opening channels that are rejected by the server. This leads to unbounded memory growth, eventually crashing the server process and affecting all connected users...

golang.org/x/crypto/ssh/agent: golang: golang.org/x/crypto/ssh/agent: Denial of Service via malformed input

A flaw was found in golang.org/x/crypto/ssh/agent. An attacker could provide specially crafted inputs that, when processed, lead to the creation of an ed25519.PrivateKey by casting malformed wire bytes. This improper input handling can cause the program to panic and crash, resulting in a Denial o...

openSUSE 16 Security Update : zk (openSUSE-SU-2026:21814-1)

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21814-1 advisory. Changes in zk: - Update Go vendored dependencies to resolve security issues boo1278625, boo1278447: Upgrade golang.org/x/crypto to v0.56.0 to fi...

CVE-2026-78662

A flaw was found in golang.org/x/crypto/ssh. A malicious remote attacker could flood a channel's incoming requests before it is established, leading to a deadlock of the entire connection. This could result in a denial of service DoS for legitimate users. Mitigation Red Hat is not aware of a...

Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh

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CVE-2026-56855 Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh

Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a protocol error and tear the connectio...

CVE-2026-56855

The golang.org/x/crypto/ssh package is vulnerable to a Denial of Service (DoS) condition where a malicious peer can send crafted messages after a channel is established to deadlock the entire connection . The root cause is the improper handling of channel messages, where certain messages would be...

CVE-2026-56855 Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh

Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a protocol error and tear the connectio...

CVE-2026-78662 Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh

Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time,...

CVE-2026-78662

A vulnerability exists where a channel registered in the mux's chanList was not usable until established, allowing a malicious peer to flood incomingRequests and deadlock the entire connection . The issue is addressed by adding an atomic established state ; once set, the handlePacket function dro...