USN-7874-3

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; - I3C subsystem; - SMB network file system; - Padata parallel execution mechanism; - Timer subsystem; - Networking core; (CVE-2023-52854, CVE-2024-35867, CVE-2024-50061, CVE-2024-56664, CVE-2025-21727, CVE-2025-37838, CVE-2025-38352)

References

https://ubuntu.com/security/notices/USN-7874-3

Affected packages

Ubuntu:Pro:20.04:LTS / linux-iot

Package

Name: linux-iot
Purl: pkg:deb/ubuntu/linux-iot@5.4.0-1056.59?arch=source&distro=esm-infra/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.4.0-1056.59

Affected versions

5.*

5.4.0-1001.3

5.4.0-1004.6

5.4.0-1005.7

5.4.0-1006.8

5.4.0-1009.11

5.4.0-1010.12

5.4.0-1011.13

5.4.0-1012.14

5.4.0-1013.15

5.4.0-1014.16

5.4.0-1017.18

5.4.0-1018.19

5.4.0-1019.20

5.4.0-1021.22

5.4.0-1022.23

5.4.0-1023.24

5.4.0-1024.25

5.4.0-1025.26

5.4.0-1026.27

5.4.0-1028.29

5.4.0-1029.30

5.4.0-1030.31

5.4.0-1031.32

5.4.0-1032.33

5.4.0-1033.34

5.4.0-1034.35

5.4.0-1035.36

5.4.0-1036.37

5.4.0-1037.38

5.4.0-1038.39

5.4.0-1039.40

5.4.0-1040.41

5.4.0-1041.42

5.4.0-1042.43

5.4.0-1043.44

5.4.0-1044.45

5.4.0-1045.46

5.4.0-1048.51

5.4.0-1049.52

5.4.0-1051.54

5.4.0-1052.55

5.4.0-1053.56

5.4.0-1054.57

5.4.0-1055.58

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "linux-buildinfo-5.4.0-1056-iot",
            "binary_version": "5.4.0-1056.59"
        },
        {
            "binary_name": "linux-headers-5.4.0-1056-iot",
            "binary_version": "5.4.0-1056.59"
        },
        {
            "binary_name": "linux-image-unsigned-5.4.0-1056-iot",
            "binary_version": "5.4.0-1056.59"
        },
        {
            "binary_name": "linux-iot-headers-5.4.0-1056",
            "binary_version": "5.4.0-1056.59"
        },
        {
            "binary_name": "linux-iot-tools-5.4.0-1056",
            "binary_version": "5.4.0-1056.59"
        },
        {
            "binary_name": "linux-modules-5.4.0-1056-iot",
            "binary_version": "5.4.0-1056.59"
        },
        {
            "binary_name": "linux-tools-5.4.0-1056-iot",
            "binary_version": "5.4.0-1056.59"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7874-3.json"

cves_map

{
    "cves": [],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}