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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-63639

CVE-2026-63639: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

Red Hat

1 advisory
  • Advisory severityHigh8.8

    High [CVE-2026-63639] Remote code execution via use-after-free in stream deserialization

    CVE-2026-63639Source published Source updated

    Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's RESTORE command accepts a malformed RDB stream payload that assigns one Pending Entry List NACK to multiple consumers during stream consumer-group deserialization, causing a use-after-free when one consumer is deleted while another still references the shared NACK and potentially allowing remote code execution. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1. This occurs when a malformed data stream is processed during stream deserialization, causing a shared resource to be improperly managed. If successfully exploited, this flaw could lead to remote code execution. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness…

    Affected products in this advisory
    • Red Hat Enterprise Linux 10.0 Extended Update Support
    • Red Hat Enterprise Linux 9
    • Red Hat Hardened Images
    • Red Hat package: valkey
    Source-reported affected versions
    • < 7.2.14
    • < 8.0.10
    • < 8.1.9
    • < 9.0.5

    1 more entries in the full advisory.

    Source-reported fixed versions
    • 7.2.14
    • 8.0.10
    • 8.1.9
    • 9.0.5

    9 more entries in the full advisory.

    Mitigation guidance
    • 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.
    Full advisory and evidenceOpen source bulletin

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