CVE-2022-23606

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    CVE-2022-23606

    Published: 22 Feb 2022Last Modified: 12 Aug 2026

    Summary: Crash when a cluster is deleted in Envoy

    Details: Envoy is an open source edge and service proxy, designed for cloud-native applications. When a cluster is deleted via Cluster Discovery Service (CDS) all idle connections established to endpoints in that cluster are disconnected. A recursion was introduced in the procedure of disconnecting idle connections that can lead to stack exhaustion and abnormal process termination when a cluster has a large number of idle connections. This infinite recursion causes Envoy to crash. Users are advised to upgrade.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23606.json, https://github.com/envoyproxy/envoy/security/advisories/GHSA-9vp2-4cp7-vvxf, https://nvd.nist.gov/vuln/detail/CVE-2022-23606, https://github.com/envoyproxy/envoy/commit/4b6dd3b53cd5c6d4d4df378a2fc62c1707522b31

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 96701cb24611b0f3aac1cc0dd8bf8589fbdf8e9e
    Fixed -4aaf9593152c6996b9da384c8918e9ad4f0abd4d

    Affected versions

    1.21.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2022-23606 | CVE-DB