NULL Pointer Dereference Affecting qemu package, versions <1:2.5+dfsg-4


0.0
medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.06% (25th percentile)
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NVD
5.5 medium
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Red Hat
3.5 low

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  • Snyk ID SNYK-DEBIAN12-QEMU-1558349
  • published 29 Dec 2016
  • disclosed 29 Dec 2016

How to fix?

Upgrade Debian:12 qemu to version 1:2.5+dfsg-4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue.