PT-2021-7379 · Qemu+5 · Qemu+5

Mauro Matteo Cascella + 1 · Published 2021-04-30 · Updated 2026-06-09 · CVE-2021-3527

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions QEMU (affected versions not specified)

Description A flaw was found in the USB redirector device of QEMU, where small USB packets are combined into a single, large transfer request to improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array on the stack without proper validation, allowing a malicious guest to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

ALT-PU-2021-2713

ALT-PU-2021-3363

ALT-PU-2024-1248

ALT-PU-2024-6235

ALT-PU-2024-7201

BDU:2022-05840

CVE-2021-3527

DLA-2753-1

DLA-3099-1

OESA-2021-1241

OPENSUSE-SU-2021:1202-1

OPENSUSE-SU-2021:2789-1

OPENSUSE-SU-2021:2858-1

OPENSUSE-SU-2021:3614-1

OPENSUSE-SU-2021_1202-1

OPENSUSE-SU-2021_2789-1

OPENSUSE-SU-2021_2858-1

OPENSUSE-SU-2021_3614-1

OPENSUSE-SU-2024:11287-1

SUSE-SU-2021:14848-1

SUSE-SU-2021:2789-1

SUSE-SU-2021:2813-1

SUSE-SU-2021:2858-1

SUSE-SU-2021:3575-1

SUSE-SU-2021:3613-1

SUSE-SU-2021:3614-1

SUSE-SU-2021:3635-1

SUSE-SU-2021_14848-1

USN-5010-1

USN-8412-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Qemu

Suse

Ubuntu

References · 307

• https://ubuntu.com/security/CVE-2021-3592 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-15863 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-15469 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:3614-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3607 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8412-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-5010-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3593 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1955695 · Patch
• https://linux.oracle.com/errata/ELSA-2021-9568.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-12067 · Security Note
• https://osv.dev/vulnerability/CVE-2021-3527 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-20221 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:2789-1 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se47-bulletin-2022-0926SE47 · Vendor Advisory