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USN-7860-1 (UBUNTU-CVE-2025-40300)

Vulnerability from osv_ubuntu – Published: 2025-11-06 09:02 – Updated: 2026-06-03 10:46 – Source website
VLAI
Summary
linux, linux-aws, linux-aws-6.14, linux-gcp, linux-gcp-6.14, linux-oem-6.14, linux-oracle, linux-oracle-6.14, linux-raspi, linux-realtime vulnerability
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.


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                  "type": "CVSS_V3"
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                  "score": "high",
                  "type": "Ubuntu"
                }
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        }
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                  "type": "CVSS_V3"
                },
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                  "type": "Ubuntu"
                }
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            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
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          "ecosystem": "Ubuntu:24.04:LTS"
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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.\n",
  "id": "USN-7860-1",
  "modified": "2026-06-03T10:46:14Z",
  "published": "2025-11-06T09:02:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7860-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-40300"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux, linux-aws, linux-aws-6.14, linux-gcp, linux-gcp-6.14, linux-oem-6.14, linux-oracle, linux-oracle-6.14, linux-raspi, linux-realtime vulnerability",
  "upstream": [
    "UBUNTU-CVE-2025-40300"
  ]
}



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