CVE-2026-90262 (GCVE-0-2026-90262)
Vulnerability from cvelistv5
Published
2026-09-17 16:07
Modified
2026-10-19 09:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: retry verity reads for not-uptodate Merkle folios btrfs_read_merkle_tree_page() can find a folio in the mapping that is not uptodate. After taking the folio lock, the current code treats that state as a read error and returns -EIO. That can make a previous transient read failure sticky. If the failed read left a not-uptodate folio in the mapping, later callers find that folio and fail instead of retrying the read. Keep the existing page-cache insertion and locking order, but retry the Merkle item read when a not-uptodate folio is found in the mapping. Also unlock the folio when read_key_bytes() fails so that a later caller can lock it and retry the read.
References
Impacted products
Vendor Product Version
Linux Linux Version: 06ed09351b67eb1114ae106a87a0ee3ea9adb3db
Version: 06ed09351b67eb1114ae106a87a0ee3ea9adb3db
Version: 06ed09351b67eb1114ae106a87a0ee3ea9adb3db
Version: 06ed09351b67eb1114ae106a87a0ee3ea9adb3db
Version: 06ed09351b67eb1114ae106a87a0ee3ea9adb3db
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/verity.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "6.18.52",
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              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: retry verity reads for not-uptodate Merkle folios\n\nbtrfs_read_merkle_tree_page() can find a folio in the mapping that is not\nuptodate.  After taking the folio lock, the current code treats that state\nas a read error and returns -EIO.\n\nThat can make a previous transient read failure sticky.  If the failed read\nleft a not-uptodate folio in the mapping, later callers find that folio and\nfail instead of retrying the read.\n\nKeep the existing page-cache insertion and locking order, but retry the\nMerkle item read when a not-uptodate folio is found in the mapping.  Also\nunlock the folio when read_key_bytes() fails so that a later caller can\nlock it and retry the read."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:00:38.640Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/90e9eae1b5907fa36620ffb7f4f1a4afa9333427"
        },
        {
          "url": "https://git.kernel.org/stable/c/c1fa005cdf3b7ff14cdfd7d512830088a3fc256b"
        },
        {
          "url": "https://git.kernel.org/stable/c/12b6d1a1715cbced2e445ca353f9c9987b8636e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/81241f734f0f662378f5ffc53882b012923e6fe5"
        },
        {
          "url": "https://git.kernel.org/stable/c/8cc569696dac51fc62bb39b3b8f530582b916d29"
        }
      ],
      "title": "btrfs: retry verity reads for not-uptodate Merkle folios",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90262",
    "datePublished": "2026-09-17T16:07:59.435Z",
    "dateReserved": "2026-09-11T19:38:34.796Z",
    "dateUpdated": "2026-10-19T09:00:38.640Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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