CVE-2023-3255

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    CVE-2023-3255

    Published: 13 Sept 2023Last Modified: 12 Aug 2026

    Summary: Qemu: vnc: infinite loop in inflate_buffer() leads to denial of service

    Details: A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the `inflate_buffer` function. This could allow a remote authenticated client who is able to send a clipboard to the VNC server to trigger a denial of service.

    References: https://access.redhat.com/downloads/content/package-browser/, https://access.redhat.com/errata/RHSA-2024:2135, https://access.redhat.com/errata/RHSA-2024:2962, https://access.redhat.com/security/cve/CVE-2023-3255, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3255.json, https://nvd.nist.gov/vuln/detail/CVE-2023-3255, https://security.netapp.com/advisory/ntap-20231020-0008/, https://bugzilla.redhat.com/show_bug.cgi?id=2218486

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    v8.0.3
    v8.0.2
    v8.0.0
    v8.0.1
    v8.0.0-rc4
    v8.0.0-rc3
    v8.0.0-rc2
    v8.0.0-rc1
    v8.0.0-rc0

    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-2023-3255 | CVE-DB