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Ubuntu Security NoticesUSN-8771-1

USN-8771-1: Valkey vulnerabilities

Madelyn Olson discovered that Valkey incorrectly handled TLS connections under certain conditions. A remote attacker could possibly use this issue to cause Valkey to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-56684) It was discovered that Valkey incorrectly handled certain stream RDB payloads when executing the RESTORE command. An authenticated remote attacker could possibly use this issue to cause Valkey to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-63639) It was discovered that Valkey incorrectly handled cluster slot migration operations. A remote attacker could possibly use this issue to cause Valkey to crash, resulting in a denial of service. This issue was only addressed in Ubuntu 26.04 LTS. (CVE-2026-85522)

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Scope

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  1. Published by Ubuntu

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  2. Added to SecurityAlert

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  3. Confirmed at the source

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Vulnerabilities

CVEs named in this advisory

CVE-2026-56684View CVSS, KEV, EPSS, and threat contextCVE-2026-63639View CVSS, KEV, EPSS, and threat contextCVE-2026-85522View CVSS, KEV, EPSS, and threat context
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