UBUNTU-CVE-2021-3929

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

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