CVE-2022-29227

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    CVE-2022-29227

    Published: 9 Jun 2022Last Modified: 12 Aug 2026

    Summary: Use after free in Envoy

    Details: Envoy is a cloud-native high-performance edge/middle/service proxy. In versions prior to 1.22.1 if Envoy attempts to send an internal redirect of an HTTP request consisting of more than HTTP headers, there’s a lifetime bug which can be triggered. If while replaying the request Envoy sends a local reply when the redirect headers are processed, the downstream state indicates that the downstream stream is not complete. On sending the local reply, Envoy will attempt to reset the upstream stream, but as it is actually complete, and deleted, this result in a use-after-free. Users are advised to upgrade. Users unable to upgrade are advised to disable internal redirects if crashes are observed.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/29xxx/CVE-2022-29227.json, https://github.com/envoyproxy/envoy/security/advisories/GHSA-rm2p-qvf6-pvr6, https://nvd.nist.gov/vuln/detail/CVE-2022-29227, https://github.com/envoyproxy/envoy/commit/fe7c69c248f4fe5a9080c7ccb35275b5218bb5ab

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -ae27fb5280d30e1400b7e9c9cbd448bfcd4ad9f5

    Affected versions

    v1.22.0

    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-2022-29227 | CVE-DB