PT-2020-6458 · Qemu+4 · Qemu+4

Ziming Zhang · Published 2020-05-26 · Updated 2026-06-09 · CVE-2020-12829

Positive Technologies (AI Summary)

CVSS v3.1

3.8

Low

Base vector

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

Name of the Vulnerable Software and Affected Versions QEMU versions prior to 5.0.0

Description The issue is related to an integer overflow in the SM501 display driver implementation, specifically in the COPY AREA macro while handling MMIO write operations through the sm501 2d engine write() callback. This can be exploited by a local attacker to crash the QEMU process, resulting in a denial of service. The sm501 2d operation() function in hw/display/sm501.c is affected.

Recommendations For QEMU versions prior to 5.0.0, update to version 5.0.0 or later to resolve the issue. As a temporary workaround, consider restricting access to the SM501 display driver implementation to minimize the risk of exploitation.

Fix

DoS

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

ALT-PU-2020-2595

ALT-PU-2021-1880

ALT-PU-2021-1964

BDU:2021-05135

CVE-2020-12829

DSA-4760-1

OPENSUSE-SU-2021:0600-1

OPENSUSE-SU-2021_0600-1

SUSE-SU-2021:1240-1

SUSE-SU-2021:1241-1

SUSE-SU-2021:1242-1

SUSE-SU-2021:1243-1

SUSE-SU-2021:1244-1

SUSE-SU-2021:1245-1

SUSE-SU-2021:1305-1

SUSE-SU-2021:14704-1

SUSE-SU-2021:14706-1

SUSE-SU-2021_1243-1

SUSE-SU-2021_14704-1

USN-4467-1

USN-4467-3

USN-8412-1

Affected Products

Alt Linux

Linuxmint

Qemu

Suse

Ubuntu

References · 166

• https://osv.dev/vulnerability/openSUSE-SU-2021:0600-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-4206 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1240-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-12829 · Security Note
• https://ubuntu.com/security/notices/USN-4467-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-15863 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-15469 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8412-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1241-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1243-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:14706-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-20221 · Vendor Advisory
• https://debian.org/security/2020/dsa-4760 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-4207 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-12829 · Vendor Advisory