usn-7939-2
Vulnerability from osv_ubuntu
Published
2025-12-16 22:25
Modified
2026-06-03 10:46
Summary
linux-azure-fips vulnerabilities
Details

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: - Cryptographic API; - ACPI drivers; - HSI subsystem; - I3C subsystem; - InfiniBand drivers; - Media drivers; - Network drivers; - Pin controllers subsystem; - AFS file system; - F2FS file system; - SMB network file system; - Padata parallel execution mechanism; - Timer subsystem; - Tracing infrastructure; - Memory management; - Appletalk network protocol; - Networking core; - Netfilter; (CVE-2022-49026, CVE-2022-49390, CVE-2023-52854, CVE-2024-35867, CVE-2024-47691, CVE-2024-49935, CVE-2024-50061, CVE-2024-50067, CVE-2024-50095, CVE-2024-50196, CVE-2024-53090, CVE-2024-53218, CVE-2024-56664, CVE-2025-21727, CVE-2025-21855, CVE-2025-37838, CVE-2025-37958, CVE-2025-38352, CVE-2025-38666, CVE-2025-39964, CVE-2025-39993, CVE-2025-40018)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2022-49026",
              "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": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-49390",
              "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": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2023-52854",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2024-35867",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2024-47691",
              "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": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2024-49935",
              "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-2024-50061",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2024-50067",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2024-50095",
              "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": "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-2024-50196",
              "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": "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-2024-53090",
              "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": "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-2024-53218",
              "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": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2024-56664",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-21727",
              "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": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-21855",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-37838",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-37958",
              "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-2025-38352",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-38666",
              "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": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-39964",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-39993",
              "severity": [
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-40018",
              "severity": [
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-40300",
              "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": "high",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:FIPS-updates:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "linux-azure-fips-cloud-tools-5.4.0-1157",
            "binary_version": "5.4.0-1157.164+fips1"
          },
          {
            "binary_name": "linux-azure-fips-headers-5.4.0-1157",
            "binary_version": "5.4.0-1157.164+fips1"
          },
          {
            "binary_name": "linux-azure-fips-tools-5.4.0-1157",
            "binary_version": "5.4.0-1157.164+fips1"
          },
          {
            "binary_name": "linux-buildinfo-5.4.0-1157-azure-fips",
            "binary_version": "5.4.0-1157.164+fips1"
          },
          {
            "binary_name": "linux-cloud-tools-5.4.0-1157-azure-fips",
            "binary_version": "5.4.0-1157.164+fips1"
          },
          {
            "binary_name": "linux-headers-5.4.0-1157-azure-fips",
            "binary_version": "5.4.0-1157.164+fips1"
          },
          {
            "binary_name": "linux-image-unsigned-5.4.0-1157-azure-fips",
            "binary_version": "5.4.0-1157.164+fips1"
          },
          {
            "binary_name": "linux-image-unsigned-hmac-5.4.0-1157-azure-fips",
            "binary_version": "5.4.0-1157.164+fips1"
          },
          {
            "binary_name": "linux-modules-5.4.0-1157-azure-fips",
            "binary_version": "5.4.0-1157.164+fips1"
          },
          {
            "binary_name": "linux-modules-extra-5.4.0-1157-azure-fips",
            "binary_version": "5.4.0-1157.164+fips1"
          },
          {
            "binary_name": "linux-tools-5.4.0-1157-azure-fips",
            "binary_version": "5.4.0-1157.164+fips1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:FIPS-updates:20.04:LTS",
        "name": "linux-azure-fips",
        "purl": "pkg:deb/ubuntu/linux-azure-fips@5.4.0-1157.164+fips1?arch=source\u0026distro=fips-updates/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.4.0-1157.164+fips1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.4.0-1022.22+fips1",
        "5.4.0-1073.76+fips1",
        "5.4.0-1074.77+fips1",
        "5.4.0-1076.79+fips1",
        "5.4.0-1078.81+fips1",
        "5.4.0-1080.83+fips1",
        "5.4.0-1083.87+fips1",
        "5.4.0-1085.90+fips1",
        "5.4.0-1086.91+fips1",
        "5.4.0-1089.94+fips1",
        "5.4.0-1090.95+fips1",
        "5.4.0-1091.96+fips1",
        "5.4.0-1094.100+fips1",
        "5.4.0-1095.101+fips1",
        "5.4.0-1098.104+fips1",
        "5.4.0-1100.106+fips1",
        "5.4.0-1101.107+fips1",
        "5.4.0-1103.109+fips1",
        "5.4.0-1104.110+fips1",
        "5.4.0-1105.111+fips1",
        "5.4.0-1106.112+fips1",
        "5.4.0-1107.113+fips1",
        "5.4.0-1108.114+fips1",
        "5.4.0-1109.115+fips1",
        "5.4.0-1110.116+fips1",
        "5.4.0-1111.117+fips1",
        "5.4.0-1112.118+fips1",
        "5.4.0-1113.119+fips1",
        "5.4.0-1114.120+fips1",
        "5.4.0-1115.122+fips1",
        "5.4.0-1116.123+fips1",
        "5.4.0-1117.124+fips1",
        "5.4.0-1118.125+fips1",
        "5.4.0-1119.126+fips1",
        "5.4.0-1121.128+fips1",
        "5.4.0-1122.129+fips1",
        "5.4.0-1123.130+fips1",
        "5.4.0-1124.131+fips1",
        "5.4.0-1126.133+fips1",
        "5.4.0-1127.134+fips1",
        "5.4.0-1128.135+fips1",
        "5.4.0-1129.136+fips1",
        "5.4.0-1130.137+fips1",
        "5.4.0-1131.138+fips1",
        "5.4.0-1132.139+fips1",
        "5.4.0-1133.140+fips1",
        "5.4.0-1134.141+fips1",
        "5.4.0-1135.142+fips1",
        "5.4.0-1136.143+fips1",
        "5.4.0-1137.144+fips1",
        "5.4.0-1138.145+fips1",
        "5.4.0-1139.146+fips1",
        "5.4.0-1140.147+fips1",
        "5.4.0-1142.149+fips1",
        "5.4.0-1143.150+fips1",
        "5.4.0-1145.152+fips1",
        "5.4.0-1147.154+fips1",
        "5.4.0-1148.156+fips1",
        "5.4.0-1149.157+fips1",
        "5.4.0-1151.158+fips1",
        "5.4.0-1152.159+fips1",
        "5.4.0-1153.160+fips1",
        "5.4.0-1154.161+fips1",
        "5.4.0-1155.162+fips1"
      ]
    }
  ],
  "aliases": [],
  "details": "\nJean-Claude Graf, Sandro R\u00fcegge, Ali Hajiabadi, and Kaveh Razavi discovered\nthat the Linux kernel contained insufficient branch predictor isolation\nbetween a guest and a userspace hypervisor for certain processors. This\nflaw is known as VMSCAPE. An attacker in a guest VM could possibly use this\nto expose sensitive information from the host OS. (CVE-2025-40300)\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  - ACPI drivers;\n  - HSI subsystem;\n  - I3C subsystem;\n  - InfiniBand drivers;\n  - Media drivers;\n  - Network drivers;\n  - Pin controllers subsystem;\n  - AFS file system;\n  - F2FS file system;\n  - SMB network file system;\n  - Padata parallel execution mechanism;\n  - Timer subsystem;\n  - Tracing infrastructure;\n  - Memory management;\n  - Appletalk network protocol;\n  - Networking core;\n  - Netfilter;\n(CVE-2022-49026, CVE-2022-49390, CVE-2023-52854, CVE-2024-35867,\nCVE-2024-47691, CVE-2024-49935, CVE-2024-50061, CVE-2024-50067,\nCVE-2024-50095, CVE-2024-50196, CVE-2024-53090, CVE-2024-53218,\nCVE-2024-56664, CVE-2025-21727, CVE-2025-21855, CVE-2025-37838,\nCVE-2025-37958, CVE-2025-38352, CVE-2025-38666, CVE-2025-39964,\nCVE-2025-39993, CVE-2025-40018)\n",
  "id": "USN-7939-2",
  "modified": "2026-06-03T10:46:17Z",
  "published": "2025-12-16T22:25:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7939-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-49026"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-49390"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-52854"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-35867"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-47691"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-49935"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-50061"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-50067"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-50095"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-50196"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-53090"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-53218"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-56664"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-21727"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-21855"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-37838"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-37958"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-38352"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-38666"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-39964"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-39993"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-40018"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-40300"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-azure-fips vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2022-49026",
    "UBUNTU-CVE-2022-49390",
    "UBUNTU-CVE-2023-52854",
    "UBUNTU-CVE-2024-35867",
    "UBUNTU-CVE-2024-47691",
    "UBUNTU-CVE-2024-49935",
    "UBUNTU-CVE-2024-50061",
    "UBUNTU-CVE-2024-50067",
    "UBUNTU-CVE-2024-50095",
    "UBUNTU-CVE-2024-50196",
    "UBUNTU-CVE-2024-53090",
    "UBUNTU-CVE-2024-53218",
    "UBUNTU-CVE-2024-56664",
    "UBUNTU-CVE-2025-21727",
    "UBUNTU-CVE-2025-21855",
    "UBUNTU-CVE-2025-37838",
    "UBUNTU-CVE-2025-37958",
    "UBUNTU-CVE-2025-38352",
    "UBUNTU-CVE-2025-38666",
    "UBUNTU-CVE-2025-39964",
    "UBUNTU-CVE-2025-39993",
    "UBUNTU-CVE-2025-40018",
    "UBUNTU-CVE-2025-40300"
  ]
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.