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dm-integrity: validate the superblock on resume

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: dm-integrity: validate the superblock on resume dm_integrity_resume() re-reads the superblock from the device so that it picks up the flags and the recalculate position. It performs no validation on the result, while the constructor validates the superblock it reads and sizes all the in-memory structures according to it. The user may modify the superblock on the underlying device while the dm-integrity device is suspended, so that the two no longer agree. In particular, access_journal_data() shifts the journal entry index by ic->sb->log2_sectors_per_block, while ic->journal_section_sectors and the journal page list were computed with the value that was present at constructor time. Increasing log2_sectors_per_block makes the index run past the end of the journal, and dm-integrity then writes 512 bytes through lowmem_page_address(NULL). Snapshot the validated superblock in the constructor and refuse to resume if any of the fields that describe the on-disk geometry changed.

Announced Source revision 1
Original source ↗

CVE-2026-99086

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-2026-99086

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": "38625191f32f77a9d5fc7cc15f4f9b78768bfb33",
        "lessThan": "454b67fcc28c18502e47dfb9f067b04c28628ada",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "118ba36e446c01e3cd34b3eedabf1d9436525e1d",
        "lessThan": "e9ec5cbbaf4dd3a02ae3d81719f4fcb9b609aa8e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "118ba36e446c01e3cd34b3eedabf1d9436525e1d",
        "lessThan": "fc79aeb86a2c244c1f1894e2d8f2966fe2b60fa2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "824b9c27d7b600520b95f0cab95a47d1b08a9483",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fb49f209995f729053c6ee728436f98d78a49b6f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c6138af1f5454c2631a837916fda958ea72c0d71",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3ff70e2e31c419e2230d0c66cb2bfb3b1b414b7f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6.18.16",
        "lessThan": "6.18.58",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.1.165",
        "lessThan": "6.2",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.6.128",
        "lessThan": "6.7",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.12.75",
        "lessThan": "6.13",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.19.6",
        "lessThan": "6.20",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "drivers/md/dm-integrity.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "7.0"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "7.0",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.18.58",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.12",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/md/dm-integrity.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-99086

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#52911 · Revision 1
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Publisher date
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