Vulnerability-Lookup

GHSA-5MQ8-R2RM-Q3GQ

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

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

md/md-llbitmap: skip reading rdevs that are not in_sync

When reading bitmap pages from member disks, the code iterates through all rdevs and attempts to read from the first available one. However, it only checks for raid_disk assignment and Faulty flag, missing the In_sync flag check.

This can cause bitmap data to be read from spare disks that are still being rebuilt and don't have valid bitmap information yet. Reading stale or uninitialized bitmap data from such disks can lead to incorrect dirty bit tracking, potentially causing data corruption during recovery or normal operation.

Add the In_sync flag check to ensure bitmap pages are only read from fully synchronized member disks that have valid bitmap data.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46045"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:23Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/md-llbitmap: skip reading rdevs that are not in_sync\n\nWhen reading bitmap pages from member disks, the code iterates through\nall rdevs and attempts to read from the first available one. However,\nit only checks for raid_disk assignment and Faulty flag, missing the\nIn_sync flag check.\n\nThis can cause bitmap data to be read from spare disks that are still\nbeing rebuilt and don\u0027t have valid bitmap information yet. Reading\nstale or uninitialized bitmap data from such disks can lead to\nincorrect dirty bit tracking, potentially causing data corruption\nduring recovery or normal operation.\n\nAdd the In_sync flag check to ensure bitmap pages are only read from\nfully synchronized member disks that have valid bitmap data.",
  "id": "GHSA-5mq8-r2rm-q3gq",
  "modified": "2026-05-27T15:33:22Z",
  "published": "2026-05-27T15:33:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46045"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3115fa2f62970d98f2a639145fb8e2767db8bbf9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7701e68b5072faa03a8f30b4081dc16df9092381"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98623c7e2a51eab1833c8628d33fa9c6ef3ce325"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46045 (GCVE-0-2026-46045)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:57 – Updated: 2026-05-27 12:57

Title

md/md-llbitmap: skip reading rdevs that are not in_sync

Summary

In the Linux kernel, the following vulnerability has been resolved: md/md-llbitmap: skip reading rdevs that are not in_sync When reading bitmap pages from member disks, the code iterates through all rdevs and attempts to read from the first available one. However, it only checks for raid_disk assignment and Faulty flag, missing the In_sync flag check. This can cause bitmap data to be read from spare disks that are still being rebuilt and don't have valid bitmap information yet. Reading stale or uninitialized bitmap data from such disks can lead to incorrect dirty bit tracking, potentially causing data corruption during recovery or normal operation. Add the In_sync flag check to ensure bitmap pages are only read from fully synchronized member disks that have valid bitmap data.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/98623c7e2a51eab18…
https://git.kernel.org/stable/c/3115fa2f62970d98f…
https://git.kernel.org/stable/c/7701e68b5072faa03…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5ab829f1971dc99f2aac10846c378e67fc875abc , < 98623c7e2a51eab1833c8628d33fa9c6ef3ce325 (git) Affected: 5ab829f1971dc99f2aac10846c378e67fc875abc , < 3115fa2f62970d98f2a639145fb8e2767db8bbf9 (git) Affected: 5ab829f1971dc99f2aac10846c378e67fc875abc , < 7701e68b5072faa03a8f30b4081dc16df9092381 (git)
Linux	Linux	Affected: 6.18 Unaffected: 0 , < 6.18 (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/md-llbitmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "3115fa2f62970d98f2a639145fb8e2767db8bbf9",
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              "version": "5ab829f1971dc99f2aac10846c378e67fc875abc",
              "versionType": "git"
            },
            {
              "lessThan": "7701e68b5072faa03a8f30b4081dc16df9092381",
              "status": "affected",
              "version": "5ab829f1971dc99f2aac10846c378e67fc875abc",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/md-llbitmap.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "version": "6.18.27",
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            },
            {
              "lessThanOrEqual": "7.0.*",
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              "version": "7.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
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              "version": "7.1-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.27",
                  "versionStartIncluding": "6.18",
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                {
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1-rc1",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/md-llbitmap: skip reading rdevs that are not in_sync\n\nWhen reading bitmap pages from member disks, the code iterates through\nall rdevs and attempts to read from the first available one. However,\nit only checks for raid_disk assignment and Faulty flag, missing the\nIn_sync flag check.\n\nThis can cause bitmap data to be read from spare disks that are still\nbeing rebuilt and don\u0027t have valid bitmap information yet. Reading\nstale or uninitialized bitmap data from such disks can lead to\nincorrect dirty bit tracking, potentially causing data corruption\nduring recovery or normal operation.\n\nAdd the In_sync flag check to ensure bitmap pages are only read from\nfully synchronized member disks that have valid bitmap data."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:57:00.839Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/3115fa2f62970d98f2a639145fb8e2767db8bbf9"
        },
        {
          "url": "https://git.kernel.org/stable/c/7701e68b5072faa03a8f30b4081dc16df9092381"
        }
      ],
      "title": "md/md-llbitmap: skip reading rdevs that are not in_sync",
      "x_generator": {
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  "cveMetadata": {
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    "datePublished": "2026-05-27T12:57:00.839Z",
    "dateReserved": "2026-05-13T15:03:33.094Z",
    "dateUpdated": "2026-05-27T12:57:00.839Z",
    "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.

Action not permitted

GHSA-5MQ8-R2RM-Q3GQ

CVE-2026-46045 (GCVE-0-2026-46045)

Tags

Sightings

Nomenclature