Red Hat Security Advisory: rhc security update

Fixed packages 1

Vulnerabilities 2

• High 8.7
  CVE-2026-84445

  gRPC-Go: Denial of Service (DoS) via crash due to missing `:authority` and `Host` headers in the xDS servers

  gRPC-Go is the Go language implementation of gRPC. Prior to 1.82.2 and 1.83.2, servers created with xds.NewGRPCServer() allow internal/transport/http2_server.go to accept an RPC containing neither the :authority header nor the Host header, while RouteAndProce…

  grpc grpc-go katib-suggestion-hyperopt katib-suggestion-goptuna-compat Debian Ubuntu Azure Linux Wolfi Go
  Sep 14, 2026
• High 7.5
  CVE-2026-56852 Public exploit

  Infinite loop on invalid input in golang.org/x/text

  A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes.

  golang.org/x/text golang.org/x/text/unicode/norm zot kubescape Debian Ubuntu Azure Linux Wolfi Go
  Jul 21, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2504233
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2533175
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_99826.json
• report
  https://access.redhat.com/security/cve/CVE-2026-56852
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-56852
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-56852
• article
  https://go.dev/cl/794100
• article
  https://go.dev/issue/80142
• advisory
  https://pkg.go.dev/vuln/GO-2026-5970
• report
  https://access.redhat.com/security/cve/CVE-2026-84445
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-84445
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-84445
• article
  https://github.com/grpc/grpc-go/commit/3822494d8ea03b992c089fd2a195f041762fffb7
• article
  https://github.com/grpc/grpc-go/commit/8668b69c167df908b6b3666dcbf40992b9e932a4
• article
  https://github.com/grpc/grpc-go/commit/93e31b48545e2a8aaeb6e06b47fb249f94e6297f
• article
  https://github.com/grpc/grpc-go/issues/9354
• article
  https://github.com/grpc/grpc-go/pull/9365
• article
  https://github.com/grpc/grpc-go/pull/9366
• article
  https://github.com/grpc/grpc-go/pull/9367
• article
  https://github.com/grpc/grpc-go/releases/tag/v1.82.2
• article
  https://github.com/grpc/grpc-go/releases/tag/v1.83.2
• article
  https://github.com/grpc/grpc-go/security/advisories/GHSA-2v4p-qf9q-27wj