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CVE-2020-35506

QEMU: use after free vulnerability in esp_do_dma() in hw/scsi/esp.c

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Severity

Moderate

Red Hat Product Security

5

CVSS 3.1

Review impact separately from score.

Published · December 22, 2020

Updated · June 28, 2026

Description

A use-after-free vulnerability was found in the am53c974 SCSI host bus adapter emulation of QEMU during the handling of the 'Information Transfer' command (CMD_TI). This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service or potential code execution with the privileges of the QEMU process.

Statement

This issue does not affect the following products, as the qemu-kvm package does not include support for the am53c974 SCSI controller emulation:

  • Red Hat Enterprise Linux
  • Red Hat Enterprise Linux Advanced Virtualization
  • Red Hat OpenStack Platform

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L

CWE-416 · Use After Free