GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

FKIE_CVE-2024-35801

Vulnerability from fkie_nvd - Published: 2024-05-17 14:15 - Updated: 2026-06-17 07:35
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Keep xfd_state in sync with MSR_IA32_XFD Commit 672365477ae8 ("x86/fpu: Update XFD state where required") and commit 8bf26758ca96 ("x86/fpu: Add XFD state to fpstate") introduced a per CPU variable xfd_state to keep the MSR_IA32_XFD value cached, in order to avoid unnecessary writes to the MSR. On CPU hotplug MSR_IA32_XFD is reset to the init_fpstate.xfd, which wipes out any stale state. But the per CPU cached xfd value is not reset, which brings them out of sync. As a consequence a subsequent xfd_update_state() might fail to update the MSR which in turn can result in XRSTOR raising a #NM in kernel space, which crashes the kernel. To fix this, introduce xfd_set_state() to write xfd_state together with MSR_IA32_XFD, and use it in all places that set MSR_IA32_XFD.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/10e4b5166df9ff7a2d5316138ca668b42d004422Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1acbca933313aa866e39996904c9aca4d435c4cdPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/21c7c00dae55cb0e3810d5f9506b58f68475d41dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92b0f04e937665bde5768f3fcc622dcce44413d8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b61e3b7055ac6edee4be071c52f48c26472d2624Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/10e4b5166df9ff7a2d5316138ca668b42d004422Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1acbca933313aa866e39996904c9aca4d435c4cdPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/21c7c00dae55cb0e3810d5f9506b58f68475d41dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/92b0f04e937665bde5768f3fcc622dcce44413d8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b61e3b7055ac6edee4be071c52f48c26472d2624Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kernel/fpu/xstate.c",
            "arch/x86/kernel/fpu/xstate.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "21c7c00dae55cb0e3810d5f9506b58f68475d41d",
              "status": "affected",
              "version": "672365477ae8afca5a1cca98c1deb733235e4525",
              "versionType": "git"
            },
            {
              "lessThan": "1acbca933313aa866e39996904c9aca4d435c4cd",
              "status": "affected",
              "version": "672365477ae8afca5a1cca98c1deb733235e4525",
              "versionType": "git"
            },
            {
              "lessThan": "92b0f04e937665bde5768f3fcc622dcce44413d8",
              "status": "affected",
              "version": "672365477ae8afca5a1cca98c1deb733235e4525",
              "versionType": "git"
            },
            {
              "lessThan": "b61e3b7055ac6edee4be071c52f48c26472d2624",
              "status": "affected",
              "version": "672365477ae8afca5a1cca98c1deb733235e4525",
              "versionType": "git"
            },
            {
              "lessThan": "10e4b5166df9ff7a2d5316138ca668b42d004422",
              "status": "affected",
              "version": "672365477ae8afca5a1cca98c1deb733235e4525",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kernel/fpu/xstate.c",
            "arch/x86/kernel/fpu/xstate.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.84",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "lessThan": "21c7c00dae55",
              "status": "affected",
              "version": "672365477ae8",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "lessThan": "1acbca933313",
              "status": "affected",
              "version": "672365477ae8",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "lessThan": "92b0f04e9376",
              "status": "affected",
              "version": "672365477ae8",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "lessThan": "b61e3b7055ac",
              "status": "affected",
              "version": "672365477ae8",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "lessThan": "10e4b5166df9",
              "status": "affected",
              "version": "672365477ae8",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "6.6.24",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "6.7.12",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "6.8.3",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "status": "unaffected",
              "version": "6.9"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:5.16:-:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "6.1.84",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "834D9BD5-42A6-4D74-979E-4D6D93F630FD",
              "versionEndExcluding": "6.1.84",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8018C1D0-0A5F-48D0-BC72-A2B33FDDA693",
              "versionEndExcluding": "6.6.24",
              "versionStartIncluding": "6.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6BE9771A-BAFD-4624-95F9-58D536540C53",
              "versionEndExcluding": "6.7.12",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4C59BBC3-6495-4A77-9C82-55EC7CDF5E02",
              "versionEndExcluding": "6.8.3",
              "versionStartIncluding": "6.8",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/fpu: Keep xfd_state in sync with MSR_IA32_XFD\n\nCommit 672365477ae8 (\"x86/fpu: Update XFD state where required\") and\ncommit 8bf26758ca96 (\"x86/fpu: Add XFD state to fpstate\") introduced a\nper CPU variable xfd_state to keep the MSR_IA32_XFD value cached, in\norder to avoid unnecessary writes to the MSR.\n\nOn CPU hotplug MSR_IA32_XFD is reset to the init_fpstate.xfd, which\nwipes out any stale state. But the per CPU cached xfd value is not\nreset, which brings them out of sync.\n\nAs a consequence a subsequent xfd_update_state() might fail to update\nthe MSR which in turn can result in XRSTOR raising a #NM in kernel\nspace, which crashes the kernel.\n\nTo fix this, introduce xfd_set_state() to write xfd_state together\nwith MSR_IA32_XFD, and use it in all places that set MSR_IA32_XFD."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/fpu: mantenga xfd_state sincronizado con MSR_IA32_XFD Confirme 672365477ae8 (\"x86/fpu: actualice el estado de XFD cuando sea necesario\") y confirme 8bf26758ca96 (\"x86/fpu: agregue el estado de XFD a fpstate\") introdujo una variable xfd_state por CPU para mantener el valor MSR_IA32_XFD en cach\u00e9, a fin de evitar escrituras innecesarias en el MSR. En la conexi\u00f3n en caliente de la CPU, MSR_IA32_XFD se restablece a init_fpstate.xfd, lo que elimina cualquier estado obsoleto. Pero el valor xfd almacenado en cach\u00e9 por CPU no se restablece, lo que los desincroniza. Como consecuencia, un xfd_update_state() posterior podr\u00eda no actualizar el MSR, lo que a su vez puede provocar que XRSTOR genere un #NM en el espacio del kernel, lo que bloquea el kernel. Para solucionar este problema, introduzca xfd_set_state() para escribir xfd_state junto con MSR_IA32_XFD y util\u00edcelo en todos los lugares que configuren MSR_IA32_XFD."
    }
  ],
  "id": "CVE-2024-35801",
  "lastModified": "2026-06-17T07:35:24.713",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-35801",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-06-03T16:40:36.565439Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-05-17T14:15:12.827",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/10e4b5166df9ff7a2d5316138ca668b42d004422"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1acbca933313aa866e39996904c9aca4d435c4cd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/21c7c00dae55cb0e3810d5f9506b58f68475d41d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/92b0f04e937665bde5768f3fcc622dcce44413d8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b61e3b7055ac6edee4be071c52f48c26472d2624"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/10e4b5166df9ff7a2d5316138ca668b42d004422"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1acbca933313aa866e39996904c9aca4d435c4cd"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/21c7c00dae55cb0e3810d5f9506b58f68475d41d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/92b0f04e937665bde5768f3fcc622dcce44413d8"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b61e3b7055ac6edee4be071c52f48c26472d2624"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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.