DEBIAN-CVE-2021-3748

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Source
https://security-tracker.debian.org/tracker/CVE-2021-3748
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-3748.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2021-3748
Upstream
Published
2022-03-23T20:15:09Z
Modified
2025-09-30T05:15:13.105882Z
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.

References

Affected packages

Debian:11 / qemu

Package

Name
qemu
Purl
pkg:deb/debian/qemu?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:5.2+dfsg-11+deb11u1

Affected versions

1:5.*

1:5.2+dfsg-11

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / qemu

Package

Name
qemu
Purl
pkg:deb/debian/qemu?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:6.1+dfsg-6

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / qemu

Package

Name
qemu
Purl
pkg:deb/debian/qemu?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:6.1+dfsg-6

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / qemu

Package

Name
qemu
Purl
pkg:deb/debian/qemu?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:6.1+dfsg-6

Ecosystem specific 

{
    "urgency": "not yet assigned"
}