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CVE-2021-4145

CVE-2021-4145

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

A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.

CVSS 6.5 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • qemu

    Versions
    • qemu-kvm 6.2.0: Affected

    No fix published

  • qemu Debian:12

    Affected ranges
    • ECOSYSTEM: < 1:6.2+dfsg-1

    Update to 1:6.2+dfsg-1

  • qemu Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:6.2+dfsg-1

    Update to 1:6.2+dfsg-1

  • qemu Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:6.2+dfsg-1

    Update to 1:6.2+dfsg-1

Original sources

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