USN-4884-1

Loris Reiff discovered that the BPF implementation in the Linux kernel did not properly validate attributes in the getsockopt BPF hook. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-20194)

It was discovered that the priority inheritance futex implementation in the Linux kernel contained a race condition, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-3347)

It was discovered that the network block device (nbd) driver in the Linux kernel contained a use-after-free vulnerability during device setup. A local attacker with access to the nbd device could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-3348)

References

Affected packages

Ubuntu:20.04:LTS / linux-oem-5.10

Package

Name: linux-oem-5.10
Purl: pkg:deb/ubuntu/linux-oem-5.10@5.10.0-1017.18?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.10.0-1017.18

Affected versions

5.*

5.10.0-1008.9

5.10.0-1011.12

5.10.0-1013.14

5.10.0-1014.15

5.10.0-1016.17

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "5.10.0-1017.18",
            "binary_name": "linux-buildinfo-5.10.0-1017-oem"
        },
        {
            "binary_version": "5.10.0-1017.18",
            "binary_name": "linux-headers-5.10.0-1017-oem"
        },
        {
            "binary_version": "5.10.0-1017.18",
            "binary_name": "linux-image-unsigned-5.10.0-1017-oem"
        },
        {
            "binary_version": "5.10.0-1017.18",
            "binary_name": "linux-modules-5.10.0-1017-oem"
        },
        {
            "binary_version": "5.10.0-1017.18",
            "binary_name": "linux-oem-5.10-headers-5.10.0-1017"
        },
        {
            "binary_version": "5.10.0-1017.18",
            "binary_name": "linux-oem-5.10-tools-5.10.0-1017"
        },
        {
            "binary_version": "5.10.0-1017.18",
            "binary_name": "linux-oem-5.10-tools-host"
        },
        {
            "binary_version": "5.10.0-1017.18",
            "binary_name": "linux-tools-5.10.0-1017-oem"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:20.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-3347",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2021-3348",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2021-20194",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "low"
                }
            ]
        }
    ]
}