RHSA-2026:76752HighCVSS 9.1

Red Hat Security Advisory: OpenShift Security Profiles Operator bug fix and enhancement update

Published
October 6, 2026
Last Modified
October 9, 2026

🔗 CVE IDs covered (31)

CVE-2025-68121 →CVE-2026-25679 →CVE-2026-32283 →CVE-2026-46595 →CVE-2026-56853 →CVE-2026-34986 →CVE-2026-39820 →CVE-2026-32280 →CVE-2026-39821 →CVE-2026-39829 →CVE-2026-56858 →CVE-2026-56862 →CVE-2026-33186 →CVE-2026-33811 →CVE-2026-39828 →CVE-2026-56860 →CVE-2026-32281 →CVE-2026-39830 →CVE-2026-42504 →CVE-2026-27145 →CVE-2026-32282 →CVE-2026-33810 →CVE-2026-33818 →CVE-2026-39831 →CVE-2026-42499 →CVE-2026-84445 →CVE-2026-39835 →CVE-2026-41178 →CVE-2026-46597 →CVE-2026-50162 →CVE-2026-56859 →

📋 Description

CVE-2025-68121 — crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption CVE-2026-25679 — net/url: Incorrect parsing of IPv6 host literals in net/url CVE-2026-27145 — crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries CVE-2026-32280 — crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building CVE-2026-32281 — crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation CVE-2026-32282 — golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root CVE-2026-32283 — crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages CVE-2026-33186 — google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation CVE-2026-33810 — crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application CVE-2026-33811 — net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME CVE-2026-33818 — encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal CVE-2026-34986 — github.com/go-jose/go-jose/v3: github.com/go-jose/go-jose/v4: Go JOSE: Denial of Service via crafted JSON Web Encryption (JWE) object CVE-2026-39820 — net/mail: golang: Go net/mail: Denial of Service via crafted email inputs CVE-2026-39821 — golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing CVE-2026-39828 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Unauthorized command execution via discarded SSH permissions CVE-2026-39829 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted public key with excessive parameters CVE-2026-39830 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses CVE-2026-39831 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Security key bypass due to missing user presence check CVE-2026-39835 — golang.org/x/crypto/ssh: golang: golang.org/x/crypto/ssh: Denial of Service via crafted SSH certificate CVE-2026-41178 — github.com/open-telemetry/opentelemetry-go: go.opentelemetry.io/otel/baggage: go.opentelemetry.io/otel/propagation: OpenTelemetry-Go: Denial of Service via oversized baggage headers CVE-2026-42499 — net/mail: golang: net/mail: Denial of Service via pathological email address parsing CVE-2026-42504 — mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header CVE-2026-46595 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Authorization bypass due to skipped source-address validation CVE-2026-46597 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted AES-GCM packet decoder inputs CVE-2026-50162 — oras-go: oras-go: File store write outside working directory via symlink traversal CVE-2026-56853 — net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service CVE-2026-56858 — html/template: golang: Go html/template: Cross-Site Scripting via pathological input CVE-2026-56859 — encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue CVE-2026-56860 — net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution CVE-2026-56862 — crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages CVE-2026-84445 — google.golang.org/grpc: gRPC-Go: Denial of Service via malformed RPC requests

🎯 Affected products10

  • OpenShift Security Profiles Operator 1
  • registry.redhat.io/compliance/openshift-security-profiles-operator-bundle@sha256:c72387fec40491e8df9125ca05edfc8809023c91177361bc2fd16f8674d54163_amd64 as a component of OpenShift Security Profiles Operator 1
  • registry.redhat.io/compliance/openshift-security-profiles-rhel8-operator@sha256:34ce8f296a463ea17f20f19ec091e9d92a6c8bb403d05639f0bca20c1bfa92c0_amd64 as a component of OpenShift Security Profiles Operator 1
  • registry.redhat.io/compliance/openshift-security-profiles-rhel8-operator@sha256:8bb1e64b1105386b4ddcb4549bb7618b794181e68ec5875e80f3ee99eea528a8_ppc64le as a component of OpenShift Security Profiles Operator 1
  • registry.redhat.io/compliance/openshift-selinuxd-rhel10@sha256:4310e1d83cbb157cefb9cffb5f05e43193471297c70a3d120428817a41a3da74_ppc64le as a component of OpenShift Security Profiles Operator 1
  • registry.redhat.io/compliance/openshift-selinuxd-rhel10@sha256:724605df834be1a7b03b9bbfdcfaf21c47371f79a15cf014a8d7bec2561b45c4_amd64 as a component of OpenShift Security Profiles Operator 1
  • registry.redhat.io/compliance/openshift-selinuxd-rhel8@sha256:1541055c8cfb27cdcc42d64476fcab9029961fb4f69a8d7e0b0789757fa61898_ppc64le as a component of OpenShift Security Profiles Operator 1
  • registry.redhat.io/compliance/openshift-selinuxd-rhel8@sha256:6f35aaaf2d33fff09ecabbff2048781b66f126dd3b1ed034542d8dc5b2b85aa8_amd64 as a component of OpenShift Security Profiles Operator 1
  • registry.redhat.io/compliance/openshift-selinuxd-rhel9@sha256:0f55528b87d9505b147ede7931c1eb9221bbd4db256c08fbec6d656009059af6_ppc64le as a component of OpenShift Security Profiles Operator 1
  • registry.redhat.io/compliance/openshift-selinuxd-rhel9@sha256:6f90e5ef3592c06e6d26e7bfc7696546a56d879ea75c6acfe44116a7e967f196_amd64 as a component of OpenShift Security Profiles Operator 1

✅ Remediation

Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://docs.openshift.com/container-platform/latest/updating/updating_a_cluster/updating-cluster-cli.html Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: A flaw was found in the Go standard library crypto/x509 package. When verifying a TLS certificate hostname, VerifyHostname processed each DNS Subject Alternative Name (SAN) entry in a loop and repeatedly split the candidate hostname on "." characters. For certificates with a very large DNS SAN list, CPU use could grow quadratically with the number of SAN entries and hostname labels. Because hostname verification runs before the certificate chain is built, this overhead can occur even when the certificate is not trusted. Red Hat rates this issue as Important. It affects Red Hat products that include the Go standard library crypto/x509 code from an affected Go toolchain version (before Go 1.25.11, or from Go 1.26.0 through Go 1.26.3). Applications and container images built with a fixed Go release (1.25.11 or later, or 1.26.4 or later) are not affected. Community distributions such as Fedora are also affected. Upstream fix: Go 1.25.11 and Go 1.26.4 (GO-2026-5037). Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Workaround: To mitigate this issue, implement infrastructure-level normalization to ensure all incoming HTTP/2 `:path` headers are properly formatted with a leading slash before reaching the gRPC-Go server. This can be achieved by configuring a reverse proxy or API gateway to validate and normalize the `:path` header. Ensure that any such intermediary is properly configured and restarted to apply the changes, which may temporarily impact service availability. Workaround: To mitigate this issue, applications can be configured to use the pure Go DNS resolver instead of the `cgo` DNS resolver. This can be achieved by setting the `GODEBUG` environment variable to `netdns=go`. For example, to run a Go application with this mitigation: `GODEBUG=netdns=go /path/to/your/go/application`. This change may require restarting affected applications or services to take effect. Users should verify that this change does not negatively impact DNS resolution for their specific application environment. Workaround: Upgrade to a fixed golang.org/x/net release that includes the idna correction, via updated golang or dependent package rebuilds. Workaround: To mitigate this denial of service vulnerability, restrict network access to any service that utilizes the `golang.org/x/crypto/ssh` library and is exposed to untrusted networks. Implement firewall rules to allow connections only from trusted hosts or networks. This action limits the ability of malicious peers to send unsolicited global request responses. A restart of the affected service may be necessary for the new network rules to be applied effectively. Workaround: To mitigate this issue, restrict network access to services that process MIME headers from untrusted sources. Implement input validation and sanitization for all incoming data, especially MIME headers, to prevent maliciously crafted content from being processed by applications utilizing the vulnerable Golang MIME package.

🔗 References (34)