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CVE-2021-3748

CVSS v3.1 7.5 (High)
75% Progress
CVSS v2.0 6.9 (Medium)
69% Progress
EPSS 0.04 % (15th)
0.04% Progress
Affected Products 6
Advisories 24
Info CVSS EPSS Affected Configurations References Security Advisories Packages & Software OVAL Tools, Exploits & PoC Graph Web & Social Timeline

A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.

Weaknesses
CWE-416
Use After Free
Related CVEs
CVE Status
PUBLISHED
CNA
Red Hat, Inc.
Published Date
2022-03-23 20:15:09
(2 years ago)
Updated Date
2023-01-03 15:16:38
(20 months ago)

Affected Products

Canonical

Debian

Fedoraproject

Qemu

Redhat

Configuration #1

    CPE23 From Up To
  Qemu from 0.10.0 version and prior 6.2.0 version cpe:2.3:a:qemu:qemu >= 0.10.0 < 6.2.0

Configuration #2

    CPE23 From Up To
  Debian Linux 9.0 cpe:2.3:o:debian:debian_linux:9.0
  Debian Linux 10.0 cpe:2.3:o:debian:debian_linux:10.0

Configuration #3

    CPE23 From Up To
  Canonical Ubuntu Linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts
  Canonical Ubuntu Linux 20.04 cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts
  Canonical Ubuntu Linux 21.10 cpe:2.3:o:canonical:ubuntu_linux:21.10

Configuration #4

    CPE23 From Up To
  Fedoraproject Fedora 34 cpe:2.3:o:fedoraproject:fedora:34

Configuration #5

    CPE23 From Up To
  Redhat Enterprise Linux 8.0 cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization
  Redhat Enterprise Linux Advanced Virtualization Eus 8.4 cpe:2.3:o:redhat:enterprise_linux_advanced_virtualization_eus:8.4