fkie_cve-2024-49872
Vulnerability from fkie_nvd
Published
2024-10-21 18:15
Modified
2024-11-13 14:26
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/gup: fix memfd_pin_folios alloc race panic If memfd_pin_folios tries to create a hugetlb page, but someone else already did, then folio gets the value -EEXIST here: folio = memfd_alloc_folio(memfd, start_idx); if (IS_ERR(folio)) { ret = PTR_ERR(folio); if (ret != -EEXIST) goto err; then on the next trip through the "while start_idx" loop we panic here: if (folio) { folio_put(folio); To fix, set the folio to NULL on error.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ce645b9fdc78ec5d28067286e92871ddae6817d5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e28f39b359c0cfdcc011603e51187085a5f1e5e3Patch
Impacted products
Vendor Product Version
linux linux_kernel *


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "54D9C704-D679-41A7-9C40-10A6B1E7FFE9",
                     versionEndExcluding: "6.11.3",
                     versionStartIncluding: "6.11",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/gup: fix memfd_pin_folios alloc race panic\n\nIf memfd_pin_folios tries to create a hugetlb page, but someone else\nalready did, then folio gets the value -EEXIST here:\n\n        folio = memfd_alloc_folio(memfd, start_idx);\n        if (IS_ERR(folio)) {\n                ret = PTR_ERR(folio);\n                if (ret != -EEXIST)\n                        goto err;\n\nthen on the next trip through the \"while start_idx\" loop we panic here:\n\n        if (folio) {\n                folio_put(folio);\n\nTo fix, set the folio to NULL on error.",
      },
      {
         lang: "es",
         value: "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/gup: corregir pánico en ejecución de asignación de memfd_pin_folios Si memfd_pin_folios intenta crear una página hugetlb, pero alguien más ya lo hizo, entonces folio obtiene el valor -EEXIST aquí: folio = memfd_alloc_folio(memfd, start_idx); if (IS_ERR(folio)) { ret = PTR_ERR(folio); if (ret != -EEXIST) goto err; luego en el siguiente viaje a través del bucle \"while start_idx\" entramos en pánico aquí: if (folio) { folio_put(folio); Para corregirlo, configure folio en NULL en caso de error.",
      },
   ],
   id: "CVE-2024-49872",
   lastModified: "2024-11-13T14:26:11.547",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "HIGH",
               attackVector: "LOCAL",
               availabilityImpact: "HIGH",
               baseScore: 4.7,
               baseSeverity: "MEDIUM",
               confidentialityImpact: "NONE",
               integrityImpact: "NONE",
               privilegesRequired: "LOW",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
               version: "3.1",
            },
            exploitabilityScore: 1,
            impactScore: 3.6,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2024-10-21T18:15:08.587",
   references: [
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/ce645b9fdc78ec5d28067286e92871ddae6817d5",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/e28f39b359c0cfdcc011603e51187085a5f1e5e3",
      },
   ],
   sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
   vulnStatus: "Analyzed",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-362",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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