usn-8281-2
Vulnerability from osv_ubuntu
Published
2026-05-22 19:17
Modified
2026-07-04 16:36
Summary
linux-azure-4.15, linux-azure-fips vulnerabilities
Details

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; (CVE-2026-31504, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-31431",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-31504",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-43033",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-43077",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-43078",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
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          },
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          },
          {
            "binary_name": "linux-buildinfo-4.15.0-1201-azure",
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          {
            "binary_name": "linux-cloud-tools-4.15.0-1201-azure",
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      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "linux-azure-4.15",
        "purl": "pkg:deb/ubuntu/linux-azure-4.15@4.15.0-1201.216?arch=source\u0026distro=esm-infra/bionic"
      },
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    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-31431",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-31504",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-43033",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-43077",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-43078",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:FIPS-updates:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "linux-azure-fips-cloud-tools-4.15.0-2110",
            "binary_version": "4.15.0-2110.116"
          },
          {
            "binary_name": "linux-azure-fips-headers-4.15.0-2110",
            "binary_version": "4.15.0-2110.116"
          },
          {
            "binary_name": "linux-azure-fips-tools-4.15.0-2110",
            "binary_version": "4.15.0-2110.116"
          },
          {
            "binary_name": "linux-buildinfo-4.15.0-2110-azure-fips",
            "binary_version": "4.15.0-2110.116"
          },
          {
            "binary_name": "linux-cloud-tools-4.15.0-2110-azure-fips",
            "binary_version": "4.15.0-2110.116"
          },
          {
            "binary_name": "linux-headers-4.15.0-2110-azure-fips",
            "binary_version": "4.15.0-2110.116"
          },
          {
            "binary_name": "linux-image-unsigned-4.15.0-2110-azure-fips",
            "binary_version": "4.15.0-2110.116"
          },
          {
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            "binary_version": "4.15.0-2110.116"
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            "binary_name": "linux-tools-4.15.0-2110-azure-fips",
            "binary_version": "4.15.0-2110.116"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:FIPS-updates:18.04:LTS",
        "name": "linux-azure-fips",
        "purl": "pkg:deb/ubuntu/linux-azure-fips@4.15.0-2110.116?arch=source\u0026distro=fips-updates/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.15.0-2110.116"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
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        "4.15.0-2006.7",
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        "4.15.0-2094.100",
        "4.15.0-2095.101",
        "4.15.0-2096.102",
        "4.15.0-2097.103",
        "4.15.0-2098.104",
        "4.15.0-2099.105",
        "4.15.0-2100.106",
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        "4.15.0-2105.111",
        "4.15.0-2106.112",
        "4.15.0-2109.115"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that the Linux kernel algif_aead module did not properly\nhandle in-place cryptographic operations. This flaw is known as Copy Fail.\nA local attacker could use this to escalate privileges, or possibly escape\na container. (CVE-2026-31431)\n\nSeveral security issues were discovered in the Linux kernel.\nAn attacker could possibly use these to compromise the system.\nThis update corrects flaws in the following subsystems:\n  - Cryptographic API;\n  - Packet sockets;\n(CVE-2026-31504, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078)\n",
  "id": "USN-8281-2",
  "modified": "2026-07-04T16:36:18Z",
  "published": "2026-05-22T19:17:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8281-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-31431"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-31504"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43033"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43077"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43078"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-azure-4.15, linux-azure-fips vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-31431",
    "UBUNTU-CVE-2026-31504",
    "UBUNTU-CVE-2026-43033",
    "UBUNTU-CVE-2026-43077",
    "UBUNTU-CVE-2026-43078"
  ]
}



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