Use After Free Affecting qemu-kvm-common package, versions <17:7.0.0-13.el9


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.13% (49th percentile)

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  • Snyk IDSNYK-ALMALINUX9-QEMUKVMCOMMON-5657039
  • published28 May 2023
  • disclosed14 Nov 2023

Introduced: 28 May 2023

CVE-2021-3750  (opens in a new tab)
CWE-416  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade AlmaLinux:9 qemu-kvm-common to version 17:7.0.0-13.el9 or higher.
This issue was patched in ALSA-2022:7967.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-kvm-common package and not the qemu-kvm-common package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead 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 execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0.

CVSS Scores

version 3.1