usn-7864-1
Vulnerability from osv_ubuntu
Published
2025-11-07 09:01
Modified
2026-07-13 09:29
Summary
linux-gcp, linux-gcp-6.8, linux-gke 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; - I2C subsystem; - Bluetooth subsystem; - Timer subsystem; (CVE-2025-37838, CVE-2025-38118, CVE-2025-38352, CVE-2025-38425)

References
To clipboard 

{
  "affected": [
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      "database_specific": {
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                },
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                  "score": "medium",
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            {
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              "severity": [
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                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
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            },
            {
              "id": "CVE-2025-38352",
              "severity": [
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                },
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                  "score": "high",
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                }
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            {
              "id": "CVE-2025-38425",
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                  "score": "CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
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                }
              ]
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        }
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                  "type": "Ubuntu"
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                {
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                  "type": "Ubuntu"
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                  "type": "CVSS_V3"
                },
                {
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                }
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        }
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  ],
  "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  - I2C subsystem;\n  - Bluetooth subsystem;\n  - Timer subsystem;\n(CVE-2025-37838, CVE-2025-38118, CVE-2025-38352, CVE-2025-38425)\n",
  "id": "USN-7864-1",
  "modified": "2026-07-13T09:29:26Z",
  "published": "2025-11-07T09:01:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7864-1"
    },
    {
      "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-2025-38425"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-40300"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-gcp, linux-gcp-6.8, linux-gke vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-37838",
    "UBUNTU-CVE-2025-38118",
    "UBUNTU-CVE-2025-38352",
    "UBUNTU-CVE-2025-38425",
    "UBUNTU-CVE-2025-40300"
  ]
}



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  • 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.


Detection rules are retrieved from Rulezet.