USN-7861-4

Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - HSI subsystem; - Bluetooth subsystem; - Timer subsystem; (CVE-2025-37838, CVE-2025-38118, CVE-2025-38352)

References

Affected packages

Ubuntu:22.04:LTS / linux-aws-6.8

Package

Name: linux-aws-6.8
Purl: pkg:deb/ubuntu/linux-aws-6.8@6.8.0-1042.44~22.04.1?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

6.8.0-1042.44~22.04.1

Affected versions

6.*

6.8.0-1009.9~22.04.2

6.8.0-1010.10~22.04.2

6.8.0-1011.12~22.04.1

6.8.0-1013.14~22.04.1

6.8.0-1014.15~22.04.1

6.8.0-1015.16~22.04.1

6.8.0-1016.17~22.04.2

6.8.0-1017.18~22.04.1

6.8.0-1018.19~22.04.1

6.8.0-1019.21~22.04.1

6.8.0-1020.22~22.04.1

6.8.0-1021.23~22.04.1

6.8.0-1023.25~22.04.1

6.8.0-1024.26~22.04.1

6.8.0-1027.29~22.04.1

6.8.0-1028.30~22.04.1

6.8.0-1029.31~22.04.1

6.8.0-1030.32~22.04.1

6.8.0-1031.33~22.04.1

6.8.0-1032.34~22.04.1

6.8.0-1033.35~22.04.1

6.8.0-1035.37~22.04.1

6.8.0-1036.38~22.04.1

6.8.0-1039.41~22.04.1

6.8.0-1040.42~22.04.1

6.8.0-1041.43~22.04.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-aws-6.8-cloud-tools-6.8.0-1042"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-aws-6.8-headers-6.8.0-1042"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-aws-6.8-tools-6.8.0-1042"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-buildinfo-6.8.0-1042-aws"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-buildinfo-6.8.0-1042-aws-64k"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-cloud-tools-6.8.0-1042-aws"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-cloud-tools-6.8.0-1042-aws-64k"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-headers-6.8.0-1042-aws"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-headers-6.8.0-1042-aws-64k"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-image-unsigned-6.8.0-1042-aws"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-image-unsigned-6.8.0-1042-aws-64k"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-modules-6.8.0-1042-aws"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-modules-6.8.0-1042-aws-64k"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-modules-extra-6.8.0-1042-aws"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-modules-extra-6.8.0-1042-aws-64k"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-tools-6.8.0-1042-aws"
        },
        {
            "binary_version": "6.8.0-1042.44~22.04.1",
            "binary_name": "linux-tools-6.8.0-1042-aws-64k"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "cves": [
        {
            "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-2025-37838"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ],
            "id": "CVE-2025-38118"
        },
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ],
            "id": "CVE-2025-38352"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ],
            "id": "CVE-2025-40300"
        }
    ],
    "ecosystem": "Ubuntu:22.04:LTS"
}