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ocfs2: reject FITRIM ranges shorter than a cluster

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ocfs2: reject FITRIM ranges shorter than a cluster ocfs2_trim_mainbm() trims the global bitmap in cluster units, but its too-short range validation only checks sb->s_blocksize. On filesystems with a cluster size larger than the block size, a FITRIM range that is at least one block but shorter than one cluster is accepted and shifted down to len == 0. The later start + len - 1 and len -= ... arithmetic then underflows and can drive trimming past the requested range. Reject ranges shorter than s_clustersize instead. That preserves the existing -EINVAL behavior for requests that cannot discard even one allocation unit and keeps zero-cluster trims out of the group walk.

Announced Source revision 1
Original source ↗

CVE-2026-74349

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-74349

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
        "lessThan": "d903d59c0315f59bdf0214b4f13d71c9feb2c45c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
        "lessThan": "441abb77222f155e8d931dbabb465466db01cfd7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
        "lessThan": "e652d0f5108e447b22da4249bcd23dd1b63c73dd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
        "lessThan": "346314bb0cc2fc52b50b73d6ecc62e0217455c2e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
        "lessThan": "06c0a0431b9856506fcd9b2c1b0c6136567d756d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
        "lessThan": "3fa7139b5f42731a61f78c42433adae13f9adc21",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
        "lessThan": "2c13e02592b918be7725ab5965e01ef4e46c4b57",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "aa89762c54800208d5afdcd8e6bf124818f17fe0",
        "lessThan": "ca1afd88f5eaaff9168e1466e5401385edf59543",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/ocfs2/alloc.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.14"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.14",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/ocfs2/alloc.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-74349

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#33105 · Revision 1
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Publisher date
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