CVE-2021-3748

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Source
https://cve.org/CVERecord?id=CVE-2021-3748
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-3748.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-3748
Downstream
Related
Published
2022-03-23T20:15:09.893Z
Modified
2026-05-15T12:04:38.047933650Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "CPE_FIELD",
            "cpes": [
                "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
                {
                    "last_affected": "18.04"
                },
                {
                    "last_affected": "20.04"
                },
                {
                    "last_affected": "21.10"
                }
            ]
        },
        {
            "source": "CPE_FIELD",
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
                {
                    "last_affected": "9.0"
                },
                {
                    "last_affected": "10.0"
                }
            ]
        },
        {
            "source": "CPE_FIELD",
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
                {
                    "last_affected": "34"
                }
            ]
        },
        {
            "source": "CPE_FIELD",
            "cpes": [
                "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*"
            ],
            "vendor_product": "redhat:enterprise_linux",
            "extracted_events": [
                {
                    "last_affected": "8.0"
                }
            ]
        },
        {
            "source": "CPE_FIELD",
            "cpes": [
                "cpe:2.3:o:redhat:enterprise_linux_advanced_virtualization_eus:8.4:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:enterprise_linux_advanced_virtualization_eus",
            "extracted_events": [
                {
                    "last_affected": "8.4"
                }
            ]
        }
    ]
}
References

Affected packages