<p>Upgrade <code>Debian:12</code> <code>qemu</code> to version 1:7.0+dfsg-1 or higher.</p>

Use After Free Affecting qemu package, versions <1:7.0+dfsg-1

Snyk CVSS

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality High

Integrity High

Availability High

Threat Intelligence

EPSS 0.07% (30^th percentile)

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Snyk ID SNYK-DEBIAN12-QEMU-2321472
published 17 Dec 2021
disclosed 25 Aug 2022

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Introduced: 17 Dec 2021

CVE-2021-3929 Open this link in a new tab CWE-416 Open this link in a new tab

How to fix?

Upgrade Debian:12 qemu to version 1:7.0+dfsg-1 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.

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.