CVE-2021-20196

A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Database specific

{
    "unresolved_ranges": [
        {
            "source": "CPE_STRING",
            "extracted_events": [
                {
                    "introduced": "9.0"
                },
                {
                    "last_affected": "9.0"
                },
                {
                    "introduced": "10.0"
                },
                {
                    "last_affected": "10.0"
                }
            ],
            "vendor_product": "debian:debian_linux",
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ]
        }
    ]
}

References

Affected packages

Git / github.com/qemu/qemu

Affected ranges

Type

GIT

Repo

https://github.com/qemu/qemu

Events

Introduced

553032db17440f8de011390e5a1cfddd13751b0b

Last affected

553032db17440f8de011390e5a1cfddd13751b0b

Database specific

{
    "cpe": "cpe:2.3:a:qemu:qemu:5.2.0:-:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "5.2.0-NA"
        },
        {
            "last_affected": "5.2.0-NA"
        }
    ],
    "source": "CPE_STRING"
}

Affected versions

5.*

5.2.0-NA

v5.*

v5.2.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20196.json"

Git / gitlab.com/qemu-project/qemu

Affected ranges

Type

GIT

Repo

https://gitlab.com/qemu-project/qemu

Events

Introduced

553032db17440f8de011390e5a1cfddd13751b0b

Last affected

553032db17440f8de011390e5a1cfddd13751b0b

Database specific

{
    "source": "CPE_STRING",
    "cpe": "cpe:2.3:a:qemu:qemu:5.2.0:-:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "5.2.0-NA"
        },
        {
            "last_affected": "5.2.0-NA"
        }
    ]
}

Affected versions

5.*

5.2.0-NA

v5.*

v5.2.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20196.json"