CVE-2021-3507

    Dashboard / Vulnerabilities / CVE-2021-3507

    CVE-2021-3507

    Published: 6 May 2021Last Modified: 8 Jul 2026

    Summary:

    Details: A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory.

    References: https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html, https://security.netapp.com/advisory/ntap-20210528-0005/, https://bugzilla.redhat.com/show_bug.cgi?id=1951118

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    v6.0.0
    v6.0.0-rc5
    v6.0.0-rc4
    v6.0.0-rc3
    v6.0.0-rc2
    v6.0.0-rc1
    v6.0.0-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-2021-3507 | CVE-DB