mm/hugetlb: avoid corrupting page->mapping in hugetlb_mcopy_atomic_pte

{
  "id": "efccbc08a94b63accc81c868e838ed8d09a815db0bdc48fb01330346edf16db3",
  "url": "https://osv.dev/vulnerability/CVE-2022-49991",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mm/hugetlb: avoid corrupting page->mapping in hugetlb_mcopy_atomic_pte",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: avoid corrupting page->mapping in hugetlb_mcopy_atomic_pte In MCOPY_ATOMIC_CONTINUE case with a non-shared VMA, pages in the page cache are installed in the ptes. But hugepage_add_new_anon_rmap is called for them mistakenly because they're not vm_shared. This will corrupt the page->mapping used by page cache code.",
    "evidence": "osv:CVE-2022-49991",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.65",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.19.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-49991",
      "aliases": [
        "CVE-2022-49991"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f619147104c8ea71e120e4936d2b68ec11a1e527"
                },
                {
                  "fixed": "da60ddd80d09f8371fbba1a238a4b318d13ba698"
                },
                {
                  "fixed": "3ada1b3e58db255a14ec73a59d7913e84dc5a8a4"
                },
                {
                  "fixed": "ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49991.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.13.0"
                },
                {
                  "fixed": "5.15.65"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.19.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49991.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.977387760Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3ada1b3e58db255a14ec73a59d7913e84dc5a8a4",
        "https://git.kernel.org/stable/c/ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6",
        "https://git.kernel.org/stable/c/da60ddd80d09f8371fbba1a238a4b318d13ba698",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49991.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49991",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49991.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49991",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496469,
  "published_at": "2025-06-18T11:00:51.745+00:00"
}