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CVE-2021-3975

CVE-2021-3975

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

A use-after-free flaw was found in libvirt. The qemuMonitorUnregister() function in qemuProcessHandleMonitorEOF is called using multiple threads without being adequately protected by a monitor lock. This flaw could be triggered by the virConnectGetAllDomainStats API when the guest is shutting down. An unprivileged client with a read-only connection could use this flaw to perform a denial of service attack by causing the libvirt daemon to crash.

CVSS 6.5 · Medium · EPSS 1.6% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • libvirt

    Versions
    • Fixed in libvirt v7.1.0: Affected

    No fix published

  • libvirt Debian:12

    Affected ranges
    • ECOSYSTEM: < 7.6.0-1

    Update to 7.6.0-1

  • libvirt Debian:13

    Affected ranges
    • ECOSYSTEM: < 7.6.0-1

    Update to 7.6.0-1

  • libvirt Debian:14

    Affected ranges
    • ECOSYSTEM: < 7.6.0-1

    Update to 7.6.0-1

  • libvirt Ubuntu:18.04:LTS

    Versions
    • 3.6.0-1ubuntu5
    • 3.6.0-1ubuntu6
    • 4.0.0-1ubuntu1
    • 4.0.0-1ubuntu2
    • 4.0.0-1ubuntu3
    • 4.0.0-1ubuntu4
    • 4.0.0-1ubuntu5
    • 4.0.0-1ubuntu6
    • 4.0.0-1ubuntu7
    • 4.0.0-1ubuntu8
    • 4.0.0-1ubuntu8.1
    • 4.0.0-1ubuntu8.2
    • 4.0.0-1ubuntu8.3
    • 4.0.0-1ubuntu8.4
    • 4.0.0-1ubuntu8.5
    • 4.0.0-1ubuntu8.6
    • 4.0.0-1ubuntu8.7
    • 4.0.0-1ubuntu8.8
    • 4.0.0-1ubuntu8.9
    • 4.0.0-1ubuntu8.10
    • 4.0.0-1ubuntu8.11
    • 4.0.0-1ubuntu8.12
    • 4.0.0-1ubuntu8.13
    • 4.0.0-1ubuntu8.14
    • 4.0.0-1ubuntu8.15
    • 4.0.0-1ubuntu8.16
    • 4.0.0-1ubuntu8.17
    • 4.0.0-1ubuntu8.19
    • 4.0.0-1ubuntu8.20
    Affected ranges
    • ECOSYSTEM: < 4.0.0-1ubuntu8.21

    Update to 4.0.0-1ubuntu8.21

  • libvirt Ubuntu:20.04:LTS

    Versions
    • 5.4.0-0ubuntu5
    • 6.0.0-0ubuntu1
    • 6.0.0-0ubuntu2
    • 6.0.0-0ubuntu3
    • 6.0.0-0ubuntu4
    • 6.0.0-0ubuntu5
    • 6.0.0-0ubuntu6
    • 6.0.0-0ubuntu7
    • 6.0.0-0ubuntu8
    • 6.0.0-0ubuntu8.1
    • 6.0.0-0ubuntu8.2
    • 6.0.0-0ubuntu8.3
    • 6.0.0-0ubuntu8.4
    • 6.0.0-0ubuntu8.5
    • 6.0.0-0ubuntu8.7
    • 6.0.0-0ubuntu8.8
    • 6.0.0-0ubuntu8.9
    • 6.0.0-0ubuntu8.10
    • 6.0.0-0ubuntu8.11
    • 6.0.0-0ubuntu8.12
    • 6.0.0-0ubuntu8.13
    • 6.0.0-0ubuntu8.14
    • 6.0.0-0ubuntu8.15
    Affected ranges
    • ECOSYSTEM: < 6.0.0-0ubuntu8.16

    Update to 6.0.0-0ubuntu8.16

  • libvirt Ubuntu:22.04:LTS

    Versions
    • 7.6.0-0ubuntu1
    Affected ranges
    • ECOSYSTEM: < 7.6.0-0ubuntu3

    Update to 7.6.0-0ubuntu3

Original sources

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