UBUNTU-CVE-2021-3929

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Source
https://ubuntu.com/security/CVE-2021-3929
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3929.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-3929
Upstream
Downstream
Related
Published
2021-12-24T00:00:00Z
Modified
2025-09-08T16:46:49Z
Severity
  • 8.2 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and, just like it, when the reentrancy write triggers the reset function nvmectrlreset(), data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition or, potentially, executing arbitrary code within the context of the QEMU process on the host.

References

Affected packages

Ubuntu:22.04:LTS / qemu

Package

Name
qemu
Purl
pkg:deb/ubuntu/qemu@1:6.2+dfsg-2ubuntu6.2?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:6.2+dfsg-2ubuntu6.2

Affected versions

1:6.*

1:6.0+dfsg-2expubuntu1
1:6.0+dfsg-2expubuntu2
1:6.0+dfsg-2expubuntu4
1:6.2+dfsg-2ubuntu5
1:6.2+dfsg-2ubuntu6
1:6.2+dfsg-2ubuntu6.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "qemu",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-block-extra",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-guest-agent",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-arm",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-common",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-data",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-gui",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-mips",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-misc",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-ppc",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-s390x",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-sparc",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-x86",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-x86-microvm",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-system-x86-xen",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-user",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-user-binfmt",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-user-static",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        },
        {
            "binary_name": "qemu-utils",
            "binary_version": "1:6.2+dfsg-2ubuntu6.2"
        }
    ]
}