RHSA-2026:64807HighCVSS 8.8

Red Hat Security Advisory: valkey security, bug fix, and enhancement update

Published
September 8, 2026
Last Modified
September 8, 2026

🔗 CVE IDs covered (3)

CVE-2026-56684 →CVE-2026-63639 →CVE-2026-66373 →

📋 Description

CVE-2026-56684 — valkey: Valkey: Remote code execution via TLS pending-data processing use-after-free CVE-2026-63639 — valkey: Valkey: Remote code execution via use-after-free in stream deserialization CVE-2026-66373 — redis: Redis: Remote Code Execution via specially crafted RESTORE payload

🎯 Affected products18

  • Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-0:8.0.10-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-0:8.0.10-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-0:8.0.10-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-0:8.0.10-1.el9_8.src as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-0:8.0.10-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-debuginfo-0:8.0.10-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-debuginfo-0:8.0.10-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-debuginfo-0:8.0.10-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-debuginfo-0:8.0.10-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-debugsource-0:8.0.10-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-debugsource-0:8.0.10-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-debugsource-0:8.0.10-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-debugsource-0:8.0.10-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-devel-0:8.0.10-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-devel-0:8.0.10-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-devel-0:8.0.10-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • valkey-devel-0:8.0.10-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Restrict network access to the Valkey instance to trusted clients and networks by configuring firewall rules to limit inbound connections to the Valkey service port. Ensure only authorized and authenticated clients can connect. If TLS is not strictly required, consider disabling it. These network restrictions will persist if the Valkey service is reloaded or restarted. Workaround: To mitigate this issue, restrict network access to the Valkey instance to only trusted clients and networks. This limits an attacker's ability to send malformed RDB stream payloads to the RESTORE command. Implement firewall rules to block unauthorized access to the Valkey port.

🔗 References (7)