USN-8280-3

It was discovered that the Linux kernel algif_aead module did not properly handle in-place cryptographic operations. This flaw is known as Copy Fail. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-31431)

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: - Cryptographic API; - Packet sockets; - TLS protocol; (CVE-2026-31504, CVE-2026-31533, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078)

References

Affected packages

Ubuntu:Pro:20.04:LTS / linux-iot

Package

Name: linux-iot
Purl: pkg:deb/ubuntu/linux-iot?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.4.0-1063.66

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

5.4.0-1056.59

5.4.0-1057.60

5.4.0-1058.61

5.4.0-1060.63

5.4.0-1061.64

5.4.0-1062.65

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "5.4.0-1063.66",
            "binary_name": "linux-buildinfo-5.4.0-1063-iot"
        },
        {
            "binary_version": "5.4.0-1063.66",
            "binary_name": "linux-headers-5.4.0-1063-iot"
        },
        {
            "binary_version": "5.4.0-1063.66",
            "binary_name": "linux-image-unsigned-5.4.0-1063-iot"
        },
        {
            "binary_version": "5.4.0-1063.66",
            "binary_name": "linux-iot-headers-5.4.0-1063"
        },
        {
            "binary_version": "5.4.0-1063.66",
            "binary_name": "linux-iot-tools-5.4.0-1063"
        },
        {
            "binary_version": "5.4.0-1063.66",
            "binary_name": "linux-modules-5.4.0-1063-iot"
        },
        {
            "binary_version": "5.4.0-1063.66",
            "binary_name": "linux-tools-5.4.0-1063-iot"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8280-3.json"

cves_map

{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-31431",
            "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": "high"
                }
            ]
        },
        {
            "id": "CVE-2026-31504",
            "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-2026-31533",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-43033",
            "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-2026-43077",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-43078",
            "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"
                }
            ]
        }
    ]
}