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CVE-2021-3929

CVE-2021-3929

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and, just like it, when the reentrancy write triggers the reset function nvme_ctrl_reset(), data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition or, potentially, executing arbitrary code within the context of the QEMU process on the host.

CVSS 8.2 · High · EPSS 0.7% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • qemu

    Versions
    • Fixed in qemu-kvm 7.0.0-rc0: Affected

    No fix published

  • qemu Debian:12

    Affected ranges
    • ECOSYSTEM: < 1:7.0+dfsg-1

    Update to 1:7.0+dfsg-1

  • qemu Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:7.0+dfsg-1

    Update to 1:7.0+dfsg-1

  • qemu Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:7.0+dfsg-1

    Update to 1:7.0+dfsg-1

  • qemu Ubuntu:22.04:LTS

    Versions
    • 1:6.0+dfsg-2expubuntu1
    • 1:6.0+dfsg-2expubuntu2
    • 1:6.0+dfsg-2expubuntu4
    • 1:6.2+dfsg-2ubuntu5
    • 1:6.2+dfsg-2ubuntu6
    • 1:6.2+dfsg-2ubuntu6.1
    Affected ranges
    • ECOSYSTEM: < 1:6.2+dfsg-2ubuntu6.2

    Update to 1:6.2+dfsg-2ubuntu6.2

Original sources

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