USN-5206-1

Nadav Amit discovered that the hugetlb implementation in the Linux kernel did not perform TLB flushes under certain conditions. A local attacker could use this to leak or alter data from other processes that use huge pages.

References

Affected packages

Ubuntu:20.04:LTS / linux-oem-5.14

Package

Name: linux-oem-5.14
Purl: pkg:deb/ubuntu/linux-oem-5.14@5.14.0-1013.13?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.14.0-1013.13

Affected versions

5.*

5.14.0-1004.4

5.14.0-1005.5

5.14.0-1007.7

5.14.0-1008.8

5.14.0-1010.10

5.14.0-1011.11

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "5.14.0-1013.13",
            "binary_name": "linux-buildinfo-5.14.0-1013-oem"
        },
        {
            "binary_version": "5.14.0-1013.13",
            "binary_name": "linux-headers-5.14.0-1013-oem"
        },
        {
            "binary_version": "5.14.0-1013.13",
            "binary_name": "linux-image-unsigned-5.14.0-1013-oem"
        },
        {
            "binary_version": "5.14.0-1013.13",
            "binary_name": "linux-modules-5.14.0-1013-oem"
        },
        {
            "binary_version": "5.14.0-1013.13",
            "binary_name": "linux-oem-5.14-headers-5.14.0-1013"
        },
        {
            "binary_version": "5.14.0-1013.13",
            "binary_name": "linux-oem-5.14-tools-5.14.0-1013"
        },
        {
            "binary_version": "5.14.0-1013.13",
            "binary_name": "linux-oem-5.14-tools-host"
        },
        {
            "binary_version": "5.14.0-1013.13",
            "binary_name": "linux-tools-5.14.0-1013-oem"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5206-1.json"

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-4002",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:20.04:LTS"
}