Allocation of Resources Without Limits or Throttling Affecting qemu-arm package, versions <4.2.1-11.28.1


Severity

Recommended
0.0
low
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-SLES152-QEMUARM-2668533
  • published14 Apr 2022
  • disclosed20 Aug 2021

Introduced: 20 Aug 2021

CVE-2021-3527  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade SLES:15.2 qemu-arm to version 4.2.1-11.28.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-arm package and not the qemu-arm package as distributed by SLES. See How to fix? for SLES:15.2 relevant fixed versions and status.

A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service.

CVSS Scores

version 3.1