usn-7861-3
Vulnerability from osv_ubuntu
Published
2025-11-13 14:33
Modified
2026-07-13 09:29
Summary
linux-nvidia-6.8, linux-oracle, linux-oracle-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: - HSI subsystem; - Bluetooth subsystem; - Timer subsystem; (CVE-2025-37838, CVE-2025-38118, CVE-2025-38352)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-37838",
              "severity": [
                {
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                  "type": "CVSS_V3"
                },
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                  "type": "Ubuntu"
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            {
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                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-38352",
              "severity": [
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                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
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            },
            {
              "id": "CVE-2025-40300",
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                  "type": "CVSS_V3"
                },
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                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
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              "severity": [
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                },
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                  "type": "CVSS_V3"
                },
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                  "score": "low",
                  "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"
                },
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                {
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                  "type": "CVSS_V3"
                },
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                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
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          },
          {
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          },
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      "database_specific": {
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          "cves": [
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              "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-2025-38118",
              "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-2025-38352",
              "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-2025-40300",
              "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-buildinfo-6.8.0-1039-oracle",
            "binary_version": "6.8.0-1039.40"
          },
          {
            "binary_name": "linux-buildinfo-6.8.0-1039-oracle-64k",
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        "6.8.0-1018.19",
        "6.8.0-1019.20",
        "6.8.0-1020.21",
        "6.8.0-1021.22",
        "6.8.0-1022.23",
        "6.8.0-1023.24",
        "6.8.0-1024.25",
        "6.8.0-1025.26",
        "6.8.0-1026.27",
        "6.8.0-1027.28",
        "6.8.0-1028.29",
        "6.8.0-1029.30",
        "6.8.0-1030.31",
        "6.8.0-1032.33",
        "6.8.0-1033.34",
        "6.8.0-1035.36",
        "6.8.0-1037.38",
        "6.8.0-1038.39"
      ]
    }
  ],
  "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  - HSI subsystem;\n  - Bluetooth subsystem;\n  - Timer subsystem;\n(CVE-2025-37838, CVE-2025-38118, CVE-2025-38352)\n",
  "id": "USN-7861-3",
  "modified": "2026-07-13T09:29:26Z",
  "published": "2025-11-13T14:33:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7861-3"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-37838"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-38118"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-38352"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-40300"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-nvidia-6.8, linux-oracle, linux-oracle-6.8 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-37838",
    "UBUNTU-CVE-2025-38118",
    "UBUNTU-CVE-2025-38352",
    "UBUNTU-CVE-2025-40300"
  ]
}



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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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Detection rules are retrieved from Rulezet.