Threats Tagged 'cve-2026-39836'

This update includes the following RPMs: golang1.25: * golang1.25-1.25.11-2.hum1 (aarch64, x86_64) * golang1.25-bin-1.25.11-2.hum1 (aarch64, x86_64) * golang1.25-docs-1.25.11-2.hum1 (noarch) * golang1.25-misc-1.25.11-2.hum1 (noarch) * golang1.25-src-1.25.11-2.hum1 (noarch) * golang1.25-tests-1.25.11-2.hum1 (noarch) * golang1.25-1.25.11-2.hum1.src (src)

Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.19.48. See the following advisory for the container images for this release: https://access.redhat.com/errata/RHSA-2026:68540 Security Fix(es): * net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME (CVE-2026-33811) * encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818) * net/mail: golang: Go net/mail: Denial of Service via crafted email inputs (CVE-2026-39820) * golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821) * net/mail: golang: net/mail: Denial of Service via pathological email address parsing (CVE-2026-42499) * mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header (CVE-2026-42504) * html/template: golang: Go html/template: Cross-Site Scripting via pathological input (CVE-2026-56858) * encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue (CVE-2026-56859) * net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution (CVE-2026-56860) * crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. All OpenShift Container Platform 4.19 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli.

This release of the Red Hat OpenShift distributed tracing platform (Tempo) provides new features, security improvements, and bug fixes. Breaking changes: * High availability defaults for TempoStack deployment sizes: Before this update, only the ingester component was scaled for high availability while all other components defaulted to a single replica, leaving the overall ingest and query paths vulnerable to single points of failure. With this update, when you set a non-demo deployment size (1x.pico, 1x.extra-small, 1x.small, or 1x.medium) in the spec.size field of the TempoStack custom resource, the Operator defaults each component to at least 2 replicas, and scales throughput-bound components at larger sizes. Watch your resource consumption, as running more replicas per component increases the total CPU and memory consumed by the deployment. Explicit per-component replicas values always take precedence. For more information, see https://redhat.atlassian.net/browse/TRACING-6169. Deprecations: * Jaeger Query is deprecated: The Jaeger Query component in the Tempo Operator is deprecated and will be removed in a future release. The Tempo Operator emits a warning when the Jaeger Query feature is enabled. To visualize traces, use the distributed tracing UI plugin as the recommended replacement for the Jaeger UI. For more information, see https://redhat.atlassian.net/browse/TRACING-6509. Technology Preview features: * None Enhancements: * High availability for TempoStack deployments: You can use the spec.replicationZones field in the TempoStack custom resource to define zone-aware replication. By using this feature, you can deploy TempoStack instances with higher resilience by spreading replicas across topology zones and ensuring minimum pod availability during disruptions. For more information, see https://redhat.atlassian.net/browse/TRACING-6168. * Service name and namespace auto-complete with query RBAC enabled: When you enable query Role-Based Access Control (RBAC) in a multi-tenant TempoStack deployment, the Tempo gateway supports auto-complete for non-sensitive attributes such as service name and namespace. Before this update, all tag value API endpoints were blocked when query RBAC was enabled, which prevented the Service Name drop-down filter in the distributed tracing console plugin from displaying results. With this update, the gateway allows the search tags API for non-sensitive attributes while still protecting sensitive span data. As a result, the Service Name filter and other non-sensitive attribute drop-down list items work correctly in multi-tenant RBAC mode. For more information, see https://redhat.atlassian.net/browse/TRACING-6485. Bug fixes: * TempoStack and TempoMonolithic status conditions accurately reflect pod readiness: Before this update, the status field of the TempoStack or TempoMonolithic custom resource might show Ready=false even when all pods were ready, or vice versa. With this update, the Operator watches Deployment and StatefulSet status changes, and the status conditions accurately reflect actual pod readiness. Deleted pods are removed from the pod status map. As a result, the status field reliably indicates the current state of the deployment. For more information, see https://redhat.atlassian.net/browse/TRACING-6453. * Gateway redirect URL respects the custom ingress hostname: Before this update, setting a custom hostname with the spec.template.gateway.ingress.host field in the TempoStack custom resource did not update the OpenShift OAuth redirect URL, so authentication redirects pointed to the wrong URL. With this update, the Operator uses the custom hostname when generating the redirect URL, and gateway authentication works correctly with custom ingress hostnames. For more information, see https://redhat.atlassian.net/browse/TRACING-6435. * Gateway starts on clusters that use external OIDC authentication: Before this update, on clusters using external OpenID Connect (OIDC) authentication instead of the built-in OpenShift OAuth server, the Tempo gateway container failed to start because it could not auto-discover the OpenShift OAuth endpoints. With this update, the gateway handles external authentication and starts correctly on such clusters. For more information, see https://redhat.atlassian.net/browse/TRACING-6646. Known issues: * None

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The multicluster engine for Kubernetes provides the foundational components that are necessary for the centralized management of multiple Kubernetes-based clusters across data centers, public clouds, and private clouds. You can use the engine to create new Red Hat OpenShift Container Platform clusters or to bring existing Kubernetes-based clusters under management by importing them. After the clusters are managed, you can use the APIs that are provided by the engine to distribute configuration based on placement policy.

An update is now available for Red Hat OpenShift GitOps.

A security update for the Go Toolset in Red Hat Enterprise Linux 8 addresses multiple vulnerabilities affecting various Go components including net/mail, cmd/go, html/template, net/http, and net packages. The issues include denial of service, cross-site scripting, arbitrary file overwrite, and integrity bypass. These vulnerabilities could lead to denial of service, security control bypass, and arbitrary file writes. Red Hat has rated this update as important and released patches for multiple architectures and variants of Red Hat Enterprise Linux 8.

CVE-2026-39836 is a high-severity vulnerability in the Go standard library's net package on Windows platforms. The Dial and LookupPort functions panic when given input containing a NUL (0) character, causing an uncaught exception that can crash the application. This results in a denial of service condition. There is no impact on confidentiality or integrity reported. No official patch or remediation guidance is currently available, and no exploits are known in the wild.

This update for go1.25-openssl fixes the following issues - Update to version go1.25.12 (bsc#1244485). - CVE-2025-61732: cmd/cgo: discrepancy between Go and C/C++ comment parsing allows for C code smuggling (bsc#1257692). - CVE-2025-68121: crypto/tls: Config.Clone copies automatically generated session ticket keys, session resumption does not account for the expiration of full certificate chain (bsc#1256818). - CVE-2026-25679: net/url: reject IPv6 literal not at start of host (bsc#1259264). - CVE-2026-27139: os: FileInfo can escape from a Root (bsc#1259268). - CVE-2026-27140: cmd/go: trust layer bypass when using cgo and SWIG (bsc#1261653). - CVE-2026-27142: html/template: URLs in meta content attribute actions are not escaped (bsc#1259265). - CVE-2026-27143: cmd/compile: possible memory corruption after bound check elimination (bsc#1261654). - CVE-2026-27144: cmd/compile: no-op interface conversion bypasses overlap checking (bsc#1261655). - CVE-2026-27145: crypto/x509: split candidate hostname only once (bsc#1267450). - CVE-2026-32280: crypto/x509: unexpected work during chain building (bsc#1261656). - CVE-2026-32281: crypto/x509: inefficient policy validation (bsc#1261657). - CVE-2026-32282: os: Root.Chmod can follow symlinks out of the root on Linux (bsc#1261658). - CVE-2026-32283: crypto/tls: multiple key update handshake messages can cause connection to deadlock (bsc#1261659). - CVE-2026-32288: archive/tar: unbounded allocation when parsing old format GNU sparse map (bsc#1261660). - CVE-2026-32289: html/template: JS template literal context incorrectly tracked (bsc#1261661). - CVE-2026-33811: net: crash when handling long CNAME response (bsc#1264508). - CVE-2026-33814: net/http: infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE (bsc#1264506). - CVE-2026-39817: cmd/go: "go tool pack" does not sanitize output paths (bsc#1264505). - CVE-2026-39819: cmd/go: "go bug" follows symlinks in predictable temporary filenames (bsc#1264504). - CVE-2026-39820: net/mail: quadratic string concatentation in consumeComment (bsc#1264503). - CVE-2026-39822: os: Root escape via symlink plus trailing slash (bsc#1271014). - CVE-2026-39823: html/template: bypass of meta content URL escaping causes XSS (bsc#1264509). - CVE-2026-39825: net/http/httputil: ReverseProxy forwards queries with more than urlmaxqueryparams parameters (bsc#1264500). - CVE-2026-39826: html/template: escaper bypass leads to XSS (bsc#1264507). - CVE-2026-39836: net: panic in Dial and LookupPort when handling NUL byte on Windows (bsc#1264501). - CVE-2026-42499: net/mail: quadratic string concatenation in consumePhrase (bsc#1264502). - CVE-2026-42501: cmd/go: malicious module proxy can bypass checksum database (bsc#1264499). - CVE-2026-42504: mime: quadratic complexity in WordDecoder.DecodeHeader (bsc#1267442). - CVE-2026-42505: crypto/tls: omit PSK in ECH outer client hello (bsc#1271015). - CVE-2026-42507: net/textproto: arbitrary input are included in errors without any escaping (bsc#1267444).

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