Vulnerability-Lookup

FKIE_CVE-2022-49991

Vulnerability from fkie_nvd - Published: 2025-06-18 11:15 - Updated: 2026-08-04 10:18

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3ada1b3e58db255a14ec73a59d7913e84dc5a8a4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/da60ddd80d09f8371fbba1a238a4b318d13ba698	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.0
linux	linux_kernel	6.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/hugetlb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "da60ddd80d09f8371fbba1a238a4b318d13ba698",
              "status": "affected",
              "version": "f619147104c8ea71e120e4936d2b68ec11a1e527",
              "versionType": "git"
            },
            {
              "lessThan": "3ada1b3e58db255a14ec73a59d7913e84dc5a8a4",
              "status": "affected",
              "version": "f619147104c8ea71e120e4936d2b68ec11a1e527",
              "versionType": "git"
            },
            {
              "lessThan": "ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/hugetlb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.65",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "70590EA7-AAB6-4DA2-AEF6-5E5E596B89DA",
              "versionEndExcluding": "5.15.65",
              "versionStartIncluding": "5.13",
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            },
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              "matchCriteriaId": "89E99903-E16D-475D-954B-2BAC46C98262",
              "versionEndExcluding": "5.19.6",
              "versionStartIncluding": "5.16",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*",
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*",
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            }
          ],
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        }
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/hugetlb: avoid corrupting page-\u003emapping in hugetlb_mcopy_atomic_pte\n\nIn MCOPY_ATOMIC_CONTINUE case with a non-shared VMA, pages in the page\ncache are installed in the ptes.  But hugepage_add_new_anon_rmap is called\nfor them mistakenly because they\u0027re not vm_shared.  This will corrupt the\npage-\u003emapping used by page cache code."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/hugetlb: evitar la corrupci\u00f3n del mapeo de p\u00e1ginas en hugetlb_mcopy_atomic_pte. En el caso de MCOPY_ATOMIC_CONTINUE con un VMA no compartido, las p\u00e1ginas de la cach\u00e9 de p\u00e1ginas se instalan en los ptes. Sin embargo, se llama a hugepage_add_new_anon_rmap por error porque no son vm_shared. Esto corromper\u00e1 el mapeo de p\u00e1ginas utilizado por el c\u00f3digo de la cach\u00e9 de p\u00e1ginas."
    }
  ],
  "id": "CVE-2022-49991",
  "lastModified": "2026-08-04T10:18:02.283",
  "metrics": {
    "cvssMetricV31": [
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        "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"
        },
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        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
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          "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"
      }
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  },
  "published": "2025-06-18T11:15:26.753",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/3ada1b3e58db255a14ec73a59d7913e84dc5a8a4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
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      "tags": [
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    }
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2022-49991 (GCVE-0-2022-49991)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:00 – Updated: 2026-08-05 08:57

Title

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

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/da60ddd80d09f8371…
https://git.kernel.org/stable/c/3ada1b3e58db255a1…
https://git.kernel.org/stable/c/ab74ef708dc51df7c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f619147104c8ea71e120e4936d2b68ec11a1e527 , < da60ddd80d09f8371fbba1a238a4b318d13ba698 (git) Affected: f619147104c8ea71e120e4936d2b68ec11a1e527 , < 3ada1b3e58db255a14ec73a59d7913e84dc5a8a4 (git) Affected: f619147104c8ea71e120e4936d2b68ec11a1e527 , < ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6 (git)
Linux	Linux	Affected: 5.13 Unaffected: 0 , < 5.13 (semver) Unaffected: 5.15.65 , ≤ 5.15.* (semver) Unaffected: 5.19.6 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/hugetlb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "f619147104c8ea71e120e4936d2b68ec11a1e527",
              "versionType": "git"
            },
            {
              "lessThan": "ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6",
              "status": "affected",
              "version": "f619147104c8ea71e120e4936d2b68ec11a1e527",
              "versionType": "git"
            }
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        },
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          "product": "Linux",
          "programFiles": [
            "mm/hugetlb.c"
          ],
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          "versions": [
            {
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              "version": "5.13"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "lessThanOrEqual": "5.15.*",
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              "version": "5.15.65",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
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        }
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              "value": "AV:L - Exploitation requires local syscalls: memfd_create(MFD_HUGETLB)/mmap, userfaultfd, and UFFDIO_CONTINUE. The vulnerable path is not reachable from the network stack or remote protocols.\nAC:L - The attacker fully controls the trigger sequence (populate the hugetlb page cache, MAP_PRIVATE + UFFD MINOR register, then UFFDIO_CONTINUE) with no race or other conditions outside their control.\nPR:L - An unprivileged user can create hugetlb memfds via memfd_create(MFD_HUGETLB) (HUGETLB_ANONHUGE_INODE needs no CAP_IPC_LOCK) and open userfaultfd with UFFD_USER_MODE_ONLY without privileges.\nUI:N - The attacker performs all setup and triggers UFFDIO_CONTINUE themselves; no action by another user is required.\nS:U - Impact is confined to the local kernel\u0027s memory-management authority (corruption/DoS/potential privilege escalation within the same host); it does not cross a VM or other security boundary.\nC:H - Corrupting page-\u003emapping on a page-cache hugepage into an attacker-owned anon_vma is type confusion; the page can retain a dangling anon_vma pointer after the private VMA is torn down, enabling use-after-free reads of kernel memory.\nI:H - The same mapping/type confusion and mapcount reset via hugepage_add_new_anon_rmap on an existing page-cache page yield a write primitive suitable for control-flow hijacking or privilege escalation.\nA:H - The invariant break reliably causes kernel oops/BUG_ON/panic paths in page-cache, rmap, and hugetlb teardown when the corrupted page is later used."
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        "dateUpdated": "2026-08-05T08:57:03.320Z",
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        {
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    "cveId": "CVE-2022-49991",
    "datePublished": "2025-06-18T11:00:51.745Z",
    "dateReserved": "2025-06-18T10:57:27.386Z",
    "dateUpdated": "2026-08-05T08:57:03.320Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.