Vulnerability-Lookup

GHSA-PRMQ-F3CR-H276

Vulnerability from github – Published: 2025-10-22 18:30 – Updated: 2025-10-22 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

fs/ntfs3: validate BOOT sectors_per_clusters

When the NTFS BOOT sectors_per_clusters field is > 0x80, it represents a shift value. Make sure that the shift value is not too large before using it (NTFS max cluster size is 2MB). Return -EVINVAL if it too large.

This prevents negative shift values and shift values that are larger than the field size.

Prevents this UBSAN error:

UBSAN: shift-out-of-bounds in ../fs/ntfs3/super.c:673:16 shift exponent -192 is negative

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49553"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:31Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate BOOT sectors_per_clusters\n\nWhen the NTFS BOOT sectors_per_clusters field is \u003e 0x80, it represents a\nshift value.  Make sure that the shift value is not too large before using\nit (NTFS max cluster size is 2MB).  Return -EVINVAL if it too large.\n\nThis prevents negative shift values and shift values that are larger than\nthe field size.\n\nPrevents this UBSAN error:\n\n UBSAN: shift-out-of-bounds in ../fs/ntfs3/super.c:673:16\n shift exponent -192 is negative",
  "id": "GHSA-prmq-f3cr-h276",
  "modified": "2025-10-22T18:30:32Z",
  "published": "2025-10-22T18:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49553"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4746c49b11b2403f5b5b07c6eac9e60663dcd9a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58cf68a1886d14ffdc5c892ce483a82156769e88"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a2b6986316a2d106f6951e76db70fa4b2fde64a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3b774342fa752a5290c0de36375289dfcf4a260"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49553 (GCVE-0-2022-49553)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:14 – Updated: 2026-08-05 08:55

Title

fs/ntfs3: validate BOOT sectors_per_clusters

Summary

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: validate BOOT sectors_per_clusters When the NTFS BOOT sectors_per_clusters field is > 0x80, it represents a shift value. Make sure that the shift value is not too large before using it (NTFS max cluster size is 2MB). Return -EVINVAL if it too large. This prevents negative shift values and shift values that are larger than the field size. Prevents this UBSAN error: UBSAN: shift-out-of-bounds in ../fs/ntfs3/super.c:673:16 shift exponent -192 is negative

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/58cf68a1886d14ffd…
https://git.kernel.org/stable/c/4746c49b11b2403f5…
https://git.kernel.org/stable/c/a2b6986316a2d106f…
https://git.kernel.org/stable/c/a3b774342fa752a52…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 58cf68a1886d14ffdc5c892ce483a82156769e88 (git) Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 4746c49b11b2403f5b5b07c6eac9e60663dcd9a3 (git) Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < a2b6986316a2d106f6951e76db70fa4b2fde64a9 (git) Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < a3b774342fa752a5290c0de36375289dfcf4a260 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.45 , ≤ 5.15.* (semver) Unaffected: 5.17.13 , ≤ 5.17.* (semver) Unaffected: 5.18.2 , ≤ 5.18.* (semver) Unaffected: 5.19 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ntfs3/super.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "58cf68a1886d14ffdc5c892ce483a82156769e88",
              "status": "affected",
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "5.15"
            },
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              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.15.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.13",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.18.2",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
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      ],
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.45",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
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                {
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate BOOT sectors_per_clusters\n\nWhen the NTFS BOOT sectors_per_clusters field is \u003e 0x80, it represents a\nshift value.  Make sure that the shift value is not too large before using\nit (NTFS max cluster size is 2MB).  Return -EVINVAL if it too large.\n\nThis prevents negative shift values and shift values that are larger than\nthe field size.\n\nPrevents this UBSAN error:\n\n UBSAN: shift-out-of-bounds in ../fs/ntfs3/super.c:673:16\n shift exponent -192 is negative"
        }
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      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached only by mounting a crafted NTFS block device/image so ntfs_init_from_boot reads attacker-controlled BOOT.sectors_per_clusters; there is no network or adjacent-protocol entry into fs/ntfs3.\nAC:L - A malicious BOOT with sectors_per_clusters in 0x81\u20130xF3 deterministically triggers the out-of-bounds shift in true_sectors_per_clst(); the attacker fully controls that field with no race or special memory layout required.\nPR:N - The attacker needs no account on the target\u2014only a malicious NTFS image (USB stick, disk/container image, or media presented to udisks2/automount), matching the established hostile-image scoring for this ntfs3 class.\nUI:R - ntfs3 is FS_REQUIRES_DEV without FS_USERNS_MOUNT, so a victim or automount daemon must mount the attacker-supplied volume before the vulnerable boot-sector parse runs.\nS:U - Impact is confined to the host kernel\u2019s handling of the mounted volume under the same OS security authority; it is not a VM escape, IOMMU bypass, or sandbox boundary crossing.\nC:H - The undefined shift yields attacker-influenced sectors_per_cluster/cluster_size geometry that can pass mount checks and drive subsequent NTFS parsing; wrong cluster geometry enables out-of-bounds reads of kernel/on-disk structures, so Confidentiality is High.\nI:H - The same poisoned cluster_size/cluster_bits feed allocation, MFT, and runlist paths that perform size-based copies and updates, enabling heap/metadata corruption and control-flow hijack primitives; Integrity is High.\nA:H - The demonstrated UBSAN shift-out-of-bounds in ntfs_fill_super and subsequent operations on invalid cluster geometry can oops/panic the kernel, so Availability impact is High."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:55:39.688Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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          "url": "https://git.kernel.org/stable/c/a2b6986316a2d106f6951e76db70fa4b2fde64a9"
        },
        {
          "url": "https://git.kernel.org/stable/c/a3b774342fa752a5290c0de36375289dfcf4a260"
        }
      ],
      "title": "fs/ntfs3: validate BOOT sectors_per_clusters",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49553",
    "datePublished": "2025-02-26T02:14:02.183Z",
    "dateReserved": "2025-02-26T02:08:31.590Z",
    "dateUpdated": "2026-08-05T08:55:39.688Z",
    "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

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