usn-7935-1
Vulnerability from osv_ubuntu
Published
2025-12-15 23:35
Modified
2026-07-13 09:29
Summary
linux-azure, linux-azure-6.8 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; - HSI subsystem; - Media drivers; - Network drivers; - Bluetooth subsystem; - Timer subsystem; - Memory management; - Appletalk network protocol; - Netfilter; - TLS protocol; (CVE-2025-21729, CVE-2025-37838, CVE-2025-37958, CVE-2025-38118, CVE-2025-38227, CVE-2025-38352, CVE-2025-38616, CVE-2025-38666, CVE-2025-38678, CVE-2025-39964, CVE-2025-39993, CVE-2025-40018)


{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-21729",
              "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-2025-37838",
              "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-2025-38118",
              "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-2025-38227",
              "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-2025-38352",
              "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-2025-38616",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "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-2025-38678",
              "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-2025-39964",
              "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:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "linux-azure-6.8-cloud-tools-6.8.0-1044",
            "binary_version": "6.8.0-1044.50~22.04.1"
          },
          {
            "binary_name": "linux-azure-6.8-headers-6.8.0-1044",
            "binary_version": "6.8.0-1044.50~22.04.1"
          },
          {
            "binary_name": "linux-azure-6.8-tools-6.8.0-1044",
            "binary_version": "6.8.0-1044.50~22.04.1"
          },
          {
            "binary_name": "linux-buildinfo-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50~22.04.1"
          },
          {
            "binary_name": "linux-cloud-tools-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50~22.04.1"
          },
          {
            "binary_name": "linux-headers-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50~22.04.1"
          },
          {
            "binary_name": "linux-image-unsigned-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50~22.04.1"
          },
          {
            "binary_name": "linux-modules-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50~22.04.1"
          },
          {
            "binary_name": "linux-modules-extra-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50~22.04.1"
          },
          {
            "binary_name": "linux-modules-involflt-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50~22.04.1"
          },
          {
            "binary_name": "linux-modules-iwlwifi-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50~22.04.1"
          },
          {
            "binary_name": "linux-tools-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50~22.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "linux-azure-6.8",
        "purl": "pkg:deb/ubuntu/linux-azure-6.8@6.8.0-1044.50~22.04.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.8.0-1044.50~22.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.8.0-1008.8~22.04.1",
        "6.8.0-1009.9~22.04.1",
        "6.8.0-1010.10~22.04.1",
        "6.8.0-1012.14~22.04.1",
        "6.8.0-1013.15~22.04.1",
        "6.8.0-1014.16~22.04.1",
        "6.8.0-1015.17~22.04.2",
        "6.8.0-1017.20~22.04.1",
        "6.8.0-1018.21~22.04.1",
        "6.8.0-1020.23~22.04.1",
        "6.8.0-1021.25~22.04.1",
        "6.8.0-1025.30~22.04.1",
        "6.8.0-1026.31~22.04.1",
        "6.8.0-1027.32~22.04.1",
        "6.8.0-1028.33~22.04.1",
        "6.8.0-1029.34~22.04.1",
        "6.8.0-1030.35~22.04.1",
        "6.8.0-1031.36~22.04.1",
        "6.8.0-1034.39~22.04.1",
        "6.8.0-1036.42~22.04.1",
        "6.8.0-1040.46~22.04.1",
        "6.8.0-1041.47~22.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-21729",
              "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-2025-37838",
              "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-2025-38118",
              "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-2025-38227",
              "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-2025-38352",
              "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-2025-38616",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "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-2025-38678",
              "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-2025-39964",
              "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:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "linux-azure-cloud-tools-6.8.0-1044",
            "binary_version": "6.8.0-1044.50"
          },
          {
            "binary_name": "linux-azure-headers-6.8.0-1044",
            "binary_version": "6.8.0-1044.50"
          },
          {
            "binary_name": "linux-azure-tools-6.8.0-1044",
            "binary_version": "6.8.0-1044.50"
          },
          {
            "binary_name": "linux-buildinfo-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50"
          },
          {
            "binary_name": "linux-cloud-tools-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50"
          },
          {
            "binary_name": "linux-headers-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50"
          },
          {
            "binary_name": "linux-image-unsigned-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50"
          },
          {
            "binary_name": "linux-modules-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50"
          },
          {
            "binary_name": "linux-modules-extra-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50"
          },
          {
            "binary_name": "linux-modules-involflt-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50"
          },
          {
            "binary_name": "linux-modules-iwlwifi-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50"
          },
          {
            "binary_name": "linux-tools-6.8.0-1044-azure",
            "binary_version": "6.8.0-1044.50"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "linux-azure",
        "purl": "pkg:deb/ubuntu/linux-azure@6.8.0-1044.50?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.8.0-1044.50"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.5.0-1007.7",
        "6.6.0-1001.1",
        "6.8.0-1001.1",
        "6.8.0-1005.5",
        "6.8.0-1006.6",
        "6.8.0-1007.7",
        "6.8.0-1008.8",
        "6.8.0-1009.9",
        "6.8.0-1010.10",
        "6.8.0-1012.14",
        "6.8.0-1013.15",
        "6.8.0-1014.16",
        "6.8.0-1015.17",
        "6.8.0-1016.18",
        "6.8.0-1017.20",
        "6.8.0-1018.21",
        "6.8.0-1020.23",
        "6.8.0-1021.25",
        "6.8.0-1025.30",
        "6.8.0-1026.31",
        "6.8.0-1027.32",
        "6.8.0-1028.33",
        "6.8.0-1029.34",
        "6.8.0-1030.35",
        "6.8.0-1031.36",
        "6.8.0-1034.39",
        "6.8.0-1038.44",
        "6.8.0-1040.46",
        "6.8.0-1041.47",
        "6.8.0-1042.48"
      ]
    }
  ],
  "aliases": [],
  "details": "Jean-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  - HSI subsystem;\n  - Media drivers;\n  - Network drivers;\n  - Bluetooth subsystem;\n  - Timer subsystem;\n  - Memory management;\n  - Appletalk network protocol;\n  - Netfilter;\n  - TLS protocol;\n(CVE-2025-21729, CVE-2025-37838, CVE-2025-37958, CVE-2025-38118,\nCVE-2025-38227, CVE-2025-38352, CVE-2025-38616, CVE-2025-38666,\nCVE-2025-38678, CVE-2025-39964, CVE-2025-39993, CVE-2025-40018)\n",
  "id": "USN-7935-1",
  "modified": "2026-07-13T09:29:29Z",
  "published": "2025-12-15T23:35:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7935-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-21729"
    },
    {
      "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-2025-38118"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-38227"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-38352"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-38616"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-38666"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-38678"
    },
    {
      "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, linux-azure-6.8 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-21729",
    "UBUNTU-CVE-2025-37838",
    "UBUNTU-CVE-2025-37958",
    "UBUNTU-CVE-2025-38118",
    "UBUNTU-CVE-2025-38227",
    "UBUNTU-CVE-2025-38352",
    "UBUNTU-CVE-2025-38616",
    "UBUNTU-CVE-2025-38666",
    "UBUNTU-CVE-2025-38678",
    "UBUNTU-CVE-2025-39964",
    "UBUNTU-CVE-2025-39993",
    "UBUNTU-CVE-2025-40018",
    "UBUNTU-CVE-2025-40300"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…