usn-7860-3
Vulnerability from osv_ubuntu
Published
2025-11-07 10:35
Modified
2026-06-03 10:46
Summary
linux-fips, linux-aws-fips, inux-gcp-fips 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.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "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:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "linux-aws-fips-cloud-tools-5.15.0-1096",
            "binary_version": "5.15.0-1096.103+fips1"
          },
          {
            "binary_name": "linux-aws-fips-headers-5.15.0-1096",
            "binary_version": "5.15.0-1096.103+fips1"
          },
          {
            "binary_name": "linux-aws-fips-tools-5.15.0-1096",
            "binary_version": "5.15.0-1096.103+fips1"
          },
          {
            "binary_name": "linux-buildinfo-5.15.0-1096-aws-fips",
            "binary_version": "5.15.0-1096.103+fips1"
          },
          {
            "binary_name": "linux-cloud-tools-5.15.0-1096-aws-fips",
            "binary_version": "5.15.0-1096.103+fips1"
          },
          {
            "binary_name": "linux-headers-5.15.0-1096-aws-fips",
            "binary_version": "5.15.0-1096.103+fips1"
          },
          {
            "binary_name": "linux-image-unsigned-5.15.0-1096-aws-fips",
            "binary_version": "5.15.0-1096.103+fips1"
          },
          {
            "binary_name": "linux-image-unsigned-hmac-5.15.0-1096-aws-fips",
            "binary_version": "5.15.0-1096.103+fips1"
          },
          {
            "binary_name": "linux-modules-5.15.0-1096-aws-fips",
            "binary_version": "5.15.0-1096.103+fips1"
          },
          {
            "binary_name": "linux-modules-extra-5.15.0-1096-aws-fips",
            "binary_version": "5.15.0-1096.103+fips1"
          },
          {
            "binary_name": "linux-tools-5.15.0-1096-aws-fips",
            "binary_version": "5.15.0-1096.103+fips1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:FIPS-updates:22.04:LTS",
        "name": "linux-aws-fips",
        "purl": "pkg:deb/ubuntu/linux-aws-fips@5.15.0-1096.103+fips1?arch=source\u0026distro=fips-updates/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.15.0-1096.103+fips1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.15.0-1051.56+fips1",
        "5.15.0-1052.57+fips1",
        "5.15.0-1053.58+fips1",
        "5.15.0-1055.60+fips1",
        "5.15.0-1056.61+fips1",
        "5.15.0-1057.63+fips1",
        "5.15.0-1060.66+fips1",
        "5.15.0-1061.67+fips1",
        "5.15.0-1062.68+fips1",
        "5.15.0-1063.69+fips1",
        "5.15.0-1064.70+fips1",
        "5.15.0-1065.71+fips1",
        "5.15.0-1066.72+fips1",
        "5.15.0-1067.73+fips1",
        "5.15.0-1068.74+fips1",
        "5.15.0-1069.75+fips1",
        "5.15.0-1070.76+fips1",
        "5.15.0-1071.77+fips1",
        "5.15.0-1072.78+fips1",
        "5.15.0-1073.79+fips1",
        "5.15.0-1076.83+fips1",
        "5.15.0-1077.84+fips1",
        "5.15.0-1078.85+fips1",
        "5.15.0-1079.86+fips1",
        "5.15.0-1080.87+fips1",
        "5.15.0-1081.88+fips1",
        "5.15.0-1082.89+fips1",
        "5.15.0-1083.90+fips1",
        "5.15.0-1084.91+fips1",
        "5.15.0-1085.92+fips1",
        "5.15.0-1086.93+fips1",
        "5.15.0-1087.94+fips1",
        "5.15.0-1088.95+fips1",
        "5.15.0-1089.96+fips1",
        "5.15.0-1090.97+fips1",
        "5.15.0-1091.98+fips1",
        "5.15.0-1092.99+fips1",
        "5.15.0-1093.100+fips1",
        "5.15.0-1095.102+fips1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "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:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "linux-buildinfo-5.15.0-161-fips",
            "binary_version": "5.15.0-161.171+fips1"
          },
          {
            "binary_name": "linux-fips-headers-5.15.0-161",
            "binary_version": "5.15.0-161.171+fips1"
          },
          {
            "binary_name": "linux-fips-tools-5.15.0-161",
            "binary_version": "5.15.0-161.171+fips1"
          },
          {
            "binary_name": "linux-headers-5.15.0-161-fips",
            "binary_version": "5.15.0-161.171+fips1"
          },
          {
            "binary_name": "linux-image-unsigned-5.15.0-161-fips",
            "binary_version": "5.15.0-161.171+fips1"
          },
          {
            "binary_name": "linux-image-unsigned-hmac-5.15.0-161-fips",
            "binary_version": "5.15.0-161.171+fips1"
          },
          {
            "binary_name": "linux-modules-5.15.0-161-fips",
            "binary_version": "5.15.0-161.171+fips1"
          },
          {
            "binary_name": "linux-modules-extra-5.15.0-161-fips",
            "binary_version": "5.15.0-161.171+fips1"
          },
          {
            "binary_name": "linux-modules-iwlwifi-5.15.0-161-fips",
            "binary_version": "5.15.0-161.171+fips1"
          },
          {
            "binary_name": "linux-tools-5.15.0-161-fips",
            "binary_version": "5.15.0-161.171+fips1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:FIPS-updates:22.04:LTS",
        "name": "linux-fips",
        "purl": "pkg:deb/ubuntu/linux-fips@5.15.0-161.171+fips1?arch=source\u0026distro=fips-updates/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.15.0-161.171+fips1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.15.0-73.80+fips1",
        "5.15.0-92.102+fips1",
        "5.15.0-94.104+fips1",
        "5.15.0-97.107+fips1",
        "5.15.0-100.110+fips1",
        "5.15.0-101.111+fips1",
        "5.15.0-102.112+fips1",
        "5.15.0-105.115+fips1",
        "5.15.0-106.116+fips1",
        "5.15.0-107.117+fips1",
        "5.15.0-111.121+fips1",
        "5.15.0-113.123+fips1",
        "5.15.0-115.125+fips1",
        "5.15.0-117.127+fips1",
        "5.15.0-118.128+fips1",
        "5.15.0-119.129+fips1",
        "5.15.0-121.131+fips1",
        "5.15.0-122.132+fips1",
        "5.15.0-124.134+fips1",
        "5.15.0-125.135+fips1",
        "5.15.0-127.137+fips1",
        "5.15.0-128.138+fips1",
        "5.15.0-130.140+fips1",
        "5.15.0-131.141+fips1",
        "5.15.0-133.144+fips1",
        "5.15.0-134.145+fips1",
        "5.15.0-135.146+fips1",
        "5.15.0-136.147+fips1",
        "5.15.0-138.148+fips1",
        "5.15.0-139.149+fips1",
        "5.15.0-140.150+fips1",
        "5.15.0-141.151+fips1",
        "5.15.0-142.152+fips1",
        "5.15.0-143.153+fips1",
        "5.15.0-144.157+fips1",
        "5.15.0-145.158+fips1",
        "5.15.0-152.162+fips1",
        "5.15.0-153.163+fips1",
        "5.15.0-156.166+fips1",
        "5.15.0-157.167+fips1",
        "5.15.0-160.170+fips1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "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:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "linux-buildinfo-5.15.0-1096-gcp-fips",
            "binary_version": "5.15.0-1096.105+fips1"
          },
          {
            "binary_name": "linux-gcp-fips-headers-5.15.0-1096",
            "binary_version": "5.15.0-1096.105+fips1"
          },
          {
            "binary_name": "linux-gcp-fips-tools-5.15.0-1096",
            "binary_version": "5.15.0-1096.105+fips1"
          },
          {
            "binary_name": "linux-headers-5.15.0-1096-gcp-fips",
            "binary_version": "5.15.0-1096.105+fips1"
          },
          {
            "binary_name": "linux-image-unsigned-5.15.0-1096-gcp-fips",
            "binary_version": "5.15.0-1096.105+fips1"
          },
          {
            "binary_name": "linux-image-unsigned-hmac-5.15.0-1096-gcp-fips",
            "binary_version": "5.15.0-1096.105+fips1"
          },
          {
            "binary_name": "linux-modules-5.15.0-1096-gcp-fips",
            "binary_version": "5.15.0-1096.105+fips1"
          },
          {
            "binary_name": "linux-modules-extra-5.15.0-1096-gcp-fips",
            "binary_version": "5.15.0-1096.105+fips1"
          },
          {
            "binary_name": "linux-tools-5.15.0-1096-gcp-fips",
            "binary_version": "5.15.0-1096.105+fips1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:FIPS-updates:22.04:LTS",
        "name": "linux-gcp-fips",
        "purl": "pkg:deb/ubuntu/linux-gcp-fips@5.15.0-1096.105+fips1?arch=source\u0026distro=fips-updates/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.15.0-1096.105+fips1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.15.0-1048.56+fips1",
        "5.15.0-1055.63+fips2",
        "5.15.0-1058.66+fips1",
        "5.15.0-1059.67+fips1",
        "5.15.0-1060.68+fips1",
        "5.15.0-1062.70+fips1",
        "5.15.0-1063.71+fips1",
        "5.15.0-1064.72+fips1",
        "5.15.0-1065.73+fips1",
        "5.15.0-1066.74+fips1",
        "5.15.0-1067.75+fips1",
        "5.15.0-1068.76+fips1",
        "5.15.0-1069.77+fips1",
        "5.15.0-1070.78+fips1",
        "5.15.0-1071.79+fips1",
        "5.15.0-1072.80+fips1",
        "5.15.0-1073.81+fips1",
        "5.15.0-1074.83+fips1",
        "5.15.0-1075.84+fips1",
        "5.15.0-1077.86+fips1",
        "5.15.0-1078.87+fips1",
        "5.15.0-1079.88+fips1",
        "5.15.0-1080.89+fips1",
        "5.15.0-1081.90+fips1",
        "5.15.0-1082.91+fips1",
        "5.15.0-1083.92+fips1",
        "5.15.0-1084.93+fips1",
        "5.15.0-1085.94+fips1",
        "5.15.0-1086.95+fips1",
        "5.15.0-1087.96+fips1",
        "5.15.0-1088.97+fips1",
        "5.15.0-1090.99+fips1",
        "5.15.0-1091.100+fips1",
        "5.15.0-1092.101+fips1",
        "5.15.0-1093.102+fips1",
        "5.15.0-1095.104+fips1"
      ]
    }
  ],
  "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-7860-3",
  "modified": "2026-06-03T10:46:14Z",
  "published": "2025-11-07T10:35:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7860-3"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-40300"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-fips, linux-aws-fips, inux-gcp-fips vulnerability",
  "upstream": [
    "UBUNTU-CVE-2025-40300"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.