UBUNTU-CVE-2026-0665

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Source
https://ubuntu.com/security/CVE-2026-0665
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0665.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-0665
Upstream
  • CVE-2026-0665
Downstream
Related
Published
2026-02-18T21:16:00Z
Modified
2026-03-07T05:03:50.797217Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An off-by-one error was found in QEMU's KVM Xen guest support. A malicious guest could use this flaw to trigger out-of-bounds heap accesses in the QEMU process via the emulated Xen physdev hypercall interface, leading to a denial of service or potential memory corruption.

References

Affected packages

Ubuntu:24.04:LTS / qemu

Package

Name
qemu
Purl
pkg:deb/ubuntu/qemu@1:8.2.2+ds-0ubuntu1.13?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:8.2.2+ds-0ubuntu1.13

Affected versions

1:8.*
1:8.0.4+dfsg-1ubuntu3
1:8.0.4+dfsg-1ubuntu4
1:8.0.4+dfsg-1ubuntu5
1:8.1.3+ds-1ubuntu2
1:8.2.1+ds-1ubuntu1
1:8.2.1+ds-1ubuntu8
1:8.2.1+ds-1ubuntu9
1:8.2.2+ds-0ubuntu1
1:8.2.2+ds-0ubuntu1.2
1:8.2.2+ds-0ubuntu1.4
1:8.2.2+ds-0ubuntu1.5
1:8.2.2+ds-0ubuntu1.6
1:8.2.2+ds-0ubuntu1.7
1:8.2.2+ds-0ubuntu1.8
1:8.2.2+ds-0ubuntu1.9
1:8.2.2+ds-0ubuntu1.10
1:8.2.2+ds-0ubuntu1.11
1:8.2.2+ds-0ubuntu1.12

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "qemu-block-extra",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-block-supplemental",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-guest-agent",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-arm",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-common",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-data",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-gui",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-mips",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-misc",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-modules-opengl",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-modules-spice",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-ppc",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-s390x",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-sparc",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-x86",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-x86-xen",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-system-xen",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-user",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-user-binfmt",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-user-static",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        },
        {
            "binary_name": "qemu-utils",
            "binary_version": "1:8.2.2+ds-0ubuntu1.13"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0665.json"

Ubuntu:25.10 / qemu

Package

Name
qemu
Purl
pkg:deb/ubuntu/qemu@1:10.1.0+ds-5ubuntu2.4?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:10.1.0+ds-5ubuntu2.4

Affected versions

1:9.*
1:9.2.1+ds-1ubuntu5
1:10.*
1:10.0.2+ds-1ubuntu1
1:10.0.2+ds-1ubuntu2
1:10.1.0+ds-1ubuntu1
1:10.1.0+ds-5ubuntu1
1:10.1.0+ds-5ubuntu2
1:10.1.0+ds-5ubuntu2.1
1:10.1.0+ds-5ubuntu2.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "qemu-block-extra",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-block-supplemental",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-guest-agent",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-arm",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-common",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-data",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-gui",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-mips",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-misc",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-modules-opengl",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-modules-spice",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-ppc",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-riscv",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-s390x",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-sparc",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-x86",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-x86-xen",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-system-xen",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-user",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-user-binfmt",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        },
        {
            "binary_name": "qemu-utils",
            "binary_version": "1:10.1.0+ds-5ubuntu2.4"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0665.json"