CVE-2026-53027 (GCVE-0-2026-53027)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-24 16:29
VLAI
Title
fs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked()
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked() When a compressed or sparse attribute has its clusters frame-aligned, vcn is rounded down to the frame start using cmask, which can result in vcn != vcn0. In this case, vcn and vcn0 may reside in different attribute segments. The code already handles the case where vcn is in a different segment by loading its runs before allocation. However, it fails to load runs for vcn0 when vcn0 resides in a different segment than vcn. This causes run_lookup_entry() to return SPARSE_LCN for vcn0 since its segment was never loaded into the in-memory run list, triggering the WARN_ON(1). Fix this by adding a missing check for vcn0 after the existing vcn segment check. If vcn0 falls outside the current segment range [svcn, evcn1), find and load the attribute segment containing vcn0 before performing the run lookup. The following scenario triggers the bug: attr_data_get_block_locked() vcn = vcn0 & cmask <- vcn != vcn0 after frame alignment load runs for vcn segment <- vcn0 segment not loaded! attr_allocate_clusters() <- allocation succeeds run_lookup_entry(vcn0) <- vcn0 not in run -> SPARSE_LCN WARN_ON(1) <- bug fires here!
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c380b52f6c5702cc4bdda5e6d456d6c19a201a0b , < 2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54 (git)
Affected: c380b52f6c5702cc4bdda5e6d456d6c19a201a0b , < d7ea8495fd307b58f8867acd81a1b40075b1d3ba (git)
Affected: 406a037d93b769bca248476bd14bbe548dc1ec35 (git)
Affected: 6.1.132 , < 6.2 (semver)
Create a notification for this product.
Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ntfs3/attrib.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54",
              "status": "affected",
              "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b",
              "versionType": "git"
            },
            {
              "lessThan": "d7ea8495fd307b58f8867acd81a1b40075b1d3ba",
              "status": "affected",
              "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "406a037d93b769bca248476bd14bbe548dc1ec35",
              "versionType": "git"
            },
            {
              "lessThan": "6.2",
              "status": "affected",
              "version": "6.1.132",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ntfs3/attrib.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.1.132",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked()\n\nWhen a compressed or sparse attribute has its clusters frame-aligned,\nvcn is rounded down to the frame start using cmask, which can result\nin vcn != vcn0. In this case, vcn and vcn0 may reside in different\nattribute segments.\n\nThe code already handles the case where vcn is in a different segment\nby loading its runs before allocation. However, it fails to load runs\nfor vcn0 when vcn0 resides in a different segment than vcn. This causes\nrun_lookup_entry() to return SPARSE_LCN for vcn0 since its segment was\nnever loaded into the in-memory run list, triggering the WARN_ON(1).\n\nFix this by adding a missing check for vcn0 after the existing vcn\nsegment check. If vcn0 falls outside the current segment range\n[svcn, evcn1), find and load the attribute segment containing vcn0\nbefore performing the run lookup.\n\nThe following scenario triggers the bug:\n  attr_data_get_block_locked()\n    vcn = vcn0 \u0026 cmask        \u003c- vcn != vcn0 after frame alignment\n    load runs for vcn segment \u003c- vcn0 segment not loaded!\n    attr_allocate_clusters()  \u003c- allocation succeeds\n    run_lookup_entry(vcn0)    \u003c- vcn0 not in run -\u003e SPARSE_LCN\n    WARN_ON(1)                \u003c- bug fires here!"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:29:35.740Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54"
        },
        {
          "url": "https://git.kernel.org/stable/c/d7ea8495fd307b58f8867acd81a1b40075b1d3ba"
        }
      ],
      "title": "fs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53027",
    "datePublished": "2026-06-24T16:29:35.740Z",
    "dateReserved": "2026-06-09T07:44:35.379Z",
    "dateUpdated": "2026-06-24T16:29:35.740Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-53027",
      "date": "2026-07-02",
      "epss": "0.00155",
      "percentile": "0.05075"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53027\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-24T17:17:14.087\",\"lastModified\":\"2026-06-24T17:17:14.087\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked()\\n\\nWhen a compressed or sparse attribute has its clusters frame-aligned,\\nvcn is rounded down to the frame start using cmask, which can result\\nin vcn != vcn0. In this case, vcn and vcn0 may reside in different\\nattribute segments.\\n\\nThe code already handles the case where vcn is in a different segment\\nby loading its runs before allocation. However, it fails to load runs\\nfor vcn0 when vcn0 resides in a different segment than vcn. This causes\\nrun_lookup_entry() to return SPARSE_LCN for vcn0 since its segment was\\nnever loaded into the in-memory run list, triggering the WARN_ON(1).\\n\\nFix this by adding a missing check for vcn0 after the existing vcn\\nsegment check. If vcn0 falls outside the current segment range\\n[svcn, evcn1), find and load the attribute segment containing vcn0\\nbefore performing the run lookup.\\n\\nThe following scenario triggers the bug:\\n  attr_data_get_block_locked()\\n    vcn = vcn0 \u0026 cmask        \u003c- vcn != vcn0 after frame alignment\\n    load runs for vcn segment \u003c- vcn0 segment not loaded!\\n    attr_allocate_clusters()  \u003c- allocation succeeds\\n    run_lookup_entry(vcn0)    \u003c- vcn0 not in run -\u003e SPARSE_LCN\\n    WARN_ON(1)                \u003c- bug fires here!\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/ntfs3/attrib.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c380b52f6c5702cc4bdda5e6d456d6c19a201a0b\",\"lessThan\":\"2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c380b52f6c5702cc4bdda5e6d456d6c19a201a0b\",\"lessThan\":\"d7ea8495fd307b58f8867acd81a1b40075b1d3ba\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"406a037d93b769bca248476bd14bbe548dc1ec35\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.1.132\",\"lessThan\":\"6.2\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/ntfs3/attrib.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d7ea8495fd307b58f8867acd81a1b40075b1d3ba\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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.