CVE-2023-6693

    Dashboard / Vulnerabilities / CVE-2023-6693

    CVE-2023-6693

    Published: 2 Jan 2024Last Modified: 28 Oct 2026

    Summary: Qemu: virtio-net: stack buffer overflow in virtio_net_flush_tx()

    Details: A stack based buffer overflow was found in the virtio-net device of QEMU. This issue occurs when flushing TX in the virtio_net_flush_tx function if guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and VIRTIO_NET_F_MRG_RXBUF are enabled. This could allow a malicious user to overwrite local variables allocated on the stack. Specifically, the `out_sg` variable could be used to read a part of process memory and send it to the wire, causing an information leak.

    References: https://access.redhat.com/downloads/content/package-browser/, https://lists.debian.org/debian-lts-announce/2025/04/msg00042.html, https://lists.fedoraproject.org/archives/list/[email protected]/message/OYGUN5HVOXESW7MSNM44E4AE2VNXQB6Y/, https://access.redhat.com/errata/RHSA-2024:2962, https://access.redhat.com/errata/RHSA-2025:4492, https://access.redhat.com/security/cve/CVE-2023-6693, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6693.json, https://nvd.nist.gov/vuln/detail/CVE-2023-6693, https://security.netapp.com/advisory/ntap-20240208-0004/, https://bugzilla.redhat.com/show_bug.cgi?id=2254580

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -f48c205fb42be48e2e47b7e1cd9a2802e5ca17b0

    Affected versions

    v8.2.0
    v8.2.0-rc4
    v8.2.0-rc3
    v8.2.0-rc2
    v8.2.0-rc1
    v8.2.0-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